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PLOS One logoLink to PLOS One
. 2020 May 7;15(5):e0232364. doi: 10.1371/journal.pone.0232364

Induced abortion incidence and safety in Côte d’Ivoire

Suzanne O Bell 1,*, Grace Sheehy 1, Andoh Kouakou Hyacinthe 2, Georges Guiella 3, Caroline Moreau 1,4
Editor: Luisa N Borrell5
PMCID: PMC7205243  PMID: 32379768

Abstract

Background

In Côte d’Ivoire, induced abortion is legally restricted unless a pregnancy threatens a woman’s life. Yet the limited available evidence suggests abortion is common and that unsafe abortion is contributing to the country’s high maternal mortality. Our study aimed to estimate the one-year incidence of induced abortion in Côte d’Ivoire using both direct and indirect methodologies, determine the safety of reported abortions, and identify the women most likely to experience a recent induced abortion or an unsafe abortion.

Methods

In 2018, we conducted a nationally representative, population-based survey of women age 15 to 49 in Côte d’Ivoire. Women reported their own abortion experiences and those of their closest female confidante. We estimated the one-year incidence of induced abortion, and the safety of the abortions women experienced. Using bivariate and multivariate regression, we separately assessed sociodemographic characteristics associated with having had a recent abortion or an unsafe abortion.

Results

Overall, 2,738 women participated in the survey, approximately two-thirds of whom reported on the abortion experiences of their closest female friend. Based on respondent data, the one-year incidence of induced abortion was 27.9 (95% CI 18.6–37.1) per 1,000 women of reproductive age, while the confidante incidence was higher at 40.7 (95% CI 33.3–48.1) per 1,000. Among respondents, 62.4% of abortions were most unsafe, while 78.5% of confidante abortions were most unsafe. Adolescents, less educated women, and the poorest women had the most unsafe abortions.

Conclusion

This study provides the first national estimates of induced abortion incidence and safety in Côte d’Ivoire, using a population-based approach to explore social determinants of abortion and unsafe abortion. Consistent with other research, our results suggest that legal restrictions on abortion in Côte d’Ivoire are not preventing women from having abortions, but rather pushing women to use unsafe, potentially dangerous abortion methods. Efforts to reduce the harms of unsafe abortion are urgently needed.

Introduction

The West African country of Côte d’Ivoire has a relatively young population and a fast-growing economy; however, a decade of conflict and instability that destroyed 42% of health facilities weakened the health system and has contributed to poor population health indicators [1]. Use of effective methods of contraception among women of reproductive age is low, with a modern contraceptive prevalence of 20.9%, and more than one-third (34.9%) of women reporting their last pregnancy was unintended [2]. The total fertility rate remains high at five children per woman and has declined only minimally in recent years [3]. Further, the country has one of the highest maternal mortality rates in the region, with estimates ranging from 502 to 944 deaths per 100,000 live births [4, 5]. These deaths are in large part a result of limited emergency obstetric care, but unsafe abortion is a significant contributor.

In Côte d’Ivoire, induced abortion is legally restricted unless a pregnancy threatens a woman’s life. The country’s Penal Code states that two medical providers must examine a woman and agree that an abortion is necessary to save her life before a pregnancy can be legally terminated [6]. Despite a lack of evidence of enforcement, anyone who provides or assists in providing an abortion—as well as the woman who obtains an abortion herself—can be punished under the law with a prison sentence and fine [7]. Although there are no national estimates of the abortion rate in Côte d’Ivoire, available evidence suggests that abortion, particularly unsafe abortion, is common.

West Africa has some of the highest rates of unsafe abortion in the world, with estimates indicating as many as 85% of abortions in the region are unsafe, which the World Health Organization (WHO) defines as being performed by an individual lacking the necessary training or in an environment not conforming to minimal medical standards [8]. These unsafe abortions are subsequently responsible for 10 to 18% of maternal deaths [5, 9]. Despite these risks, existing research suggests that abortion is a common means of fertility control in Côte d’Ivoire. In one national survey, 42.5% of women of reproductive age with a history of pregnancy reported having had a prior abortion [10]. The same study found that 50.1% of abortions reported took place in the home, using methods such as plants, while 47.9% took place in a health facility. Nearly half (49.4%) of reported abortions were performed by traditional practitioners or women themselves. Most women who had an abortion were under the age of 25 and unmarried. Based on these limited available data, the majority of abortions in Côte d’Ivoire are likely to be unsafe.

While unsafe abortion is a significant contributor to maternal morbidity and mortality, the measurement of abortion is challenging due to underreporting in facility statistics, omission of abortions that take place outside the healthcare system, and underreporting in self-report questions in population-based surveys. Research on women’s abortion experiences outside the formal healthcare system, particularly self-managed medication abortion, is scarce and typically not representative. Capturing these experiences is essential to understanding the scope and determinants of abortion and of unsafe abortion in Côte d’Ivoire.

The first aim of this study was to estimate the one-year incidence of induced abortion in Côte d’Ivoire overall and by women’s background characteristics, using both direct and indirect methodologies. Our second aim was to determine the safety of reported abortions and identify the women who were most likely to experience the most unsafe abortions.

Methods

Sampling

Data for this study come from the population-based survey of reproductive age (15–49) women in Côte d’Ivoire conducted by Performance Monitoring and Accountability 2020 (PMA2020)/Côte d’Ivoire. PMA2020 is a multi-disciplinary team of researchers that conducts rapid-turnaround survey-based research in 11 countries using smart phones. The Institut National de la Statistique de la Côte d’Ivoire (INS-Côte d’Ivoire) and the Coordination du Programme National de Santé de la Mère et de l’Enfant (DC-PNSME) within the Ministry of Health implemented the PMA2020/Côte d’Ivoire abortion project with guidance from the Institut Supérieur des Sciences de la Population in Ouagadougou, Burkina Faso and overall direction and support provided by the Bill & Melinda Gates Institute for Population and Reproductive Health at the Johns Hopkins Bloomberg School of Public Health.

These data were collected as part of the second round of PMA2020/Côte d’Ivoire, which occurred from July through August 2018. The sampling strategy relied on an urban-rural stratified cluster design with probability proportional to size selection of 73 enumeration areas (EAs), each of which represented a cluster of approximately 200 households. The National Statistics Institute (INS) selected the EAs from a sampling frame provided by the 2014 General Census of Population and Housing. In each EA, female resident interviewers mapped and listed all households and supervisors randomly selected 35 households from each EA sampling frame created. All women age 15 to 49 identified in selected households were eligible to participate in the face-to-face surveys, which interviewers conducted in French or local languages using smartphones, entering data via an Open Data Kit (ODK) application on the phone; the English and the French translation of the questionnaire are provided in the supplementary materials (S1 Doc and S2 Doc). In order for the data to be nationally representative we constructed survey weights, which we calculated using the inverse of the probability of selection, accounting for the probability of EA selection, probability of household selection, and household and female response rates. The final sample included 2,738 de facto women (female response rate 98.1%). The Johns Hopkins Bloomberg School of Public Health institutional review board (IRB) and the Comité d'Éthique de la Recherche of Côte d’Ivoire provided ethical approval for this study. Women provided verbal informed consent prior to participation, with minors treated as adults in accordance with local IRB approval. Interviewers indicated receipt of verbal consent by checking a box in the smartphone survey to confirm and entering their name as a witness to the consent process.

Measures

The household survey produced data on household wealth while the linked female survey covered socio-demographic characteristics, current and past pregnancies, contraceptive knowledge and use, and related reproductive health topics. All women who consented to participate in the core PMA2020 female questionnaire also answered questions in the abortion module, which explored abortion frequency, methods, and sources in Côte d’Ivoire. The female abortion module included additional questions related to the respondent and her closest confidante’s experiences with abortion.

In the abortion module, the interviewer first asked the respondent to indicate the number of close female confidantes she had, defining a close female confidante as a woman age 15 to 49 currently living in Côte d’Ivoire who shares personal information with the respondent and with whom the respondent shares personal information. The respondent provided the age and education of their closest female confidante before the interviewer asked about the confidante’s experience with abortion. No prior questions in the survey had mentioned abortion so as not to bias respondents’ confidante selection. This indirect confidante approach builds off prior social network-based measurement of abortion [1113]. We write about this method in more detail elsewhere [14].

Terminology and question phrasing are particularly important when addressing a sensitive topic like induced abortion. In order to avoid inclusion of miscarriage experiences, interviewers read the following preamble at the outset of the abortion module to indicate that subsequent questions were in the context of an unintended pregnancy: “Sometimes women are worried they are pregnant or get pregnant when they do not want to be and they do something to remove the pregnancy.” To assess respondent interpretation, the pilot questionnaires included quantitative face validity questions where the interviewer asked the respondent to describe how she interpreted or understood the phrases “pregnancy removal” and “period regulation at a time when you were worried you were pregnant”. In total, interviewers conducted 31 pilot surveys in Cote d’Ivoire. Interviewers indicated that 100% of pilot survey respondents interpreted the “pregnancy removal” and “period regulation” phrases correctly.

After collecting details on the respondent’s confidantes, the interviewer asked separate questions of the respondent regarding the confidante’s experience with pregnancy removal at a time the confidante was pregnant or worried she was pregnant, or period regulation at a time the confidante was worried she was pregnant. The interviewer then collected additional details about reported pregnancy removals and period regulations, including year, whether the woman did multiple things to terminate the pregnancy, method(s), and source(s). We were unable to collect information on repeated abortions thus these details correspond to the most recent pregnancy removal or period regulation. For confidantes who did multiple things in the process of terminating, subsequent questions inquired about the first method and source and the last method and source. The interviewer then asked these questions with regard to the respondent’s own experience. Abortion methods included surgery, medication abortion (MA) drugs, other pills (antibiotics, antimalarial medication) or unspecified pills, and traditional or other methods (industrial products like bleach, herbal remedies, inserting materials into the vagina). Sources included public facilities, private facilities (including non-governmental organizations and private doctors), pharmacies or chemist shops, and traditional or other sources (including shops, markets, friends or relatives, or home). Interviewers did not read method and source options aloud; women volunteered their answer and interviewers probed when necessary to determine the appropriate response option to select. In the pilot, women were unable to provide detail regarding the specific surgery type (e.g. dilation and curettage, manual vacuum aspiration), thus interviewers only selected the one “surgery” option if a woman described having a procedure.

We operationalized abortion safety using the method and source information, corresponding to two dimensions of safety: 1) whether the process involved any non-recommended methods (i.e. other than surgery or medication abortion drugs) that put the woman at potentially high risk of abortion-related morbidity or mortality; and 2) whether the source(s) used were clinical (public or private facilities) or non-clinical (any other source). For respondents or confidantes who did more than one thing to terminate the pregnancy, we categorized their abortion as involving a non-recommended method if either the first or last method was something other than surgery or MA drugs. Similarly, we categorized an abortion as involving a non-clinical source if at any point the woman accessed care outside of a public or private facility. To create a single measure of safety, we combined these two dimensions to create the following four categories of abortion safety: 1) recommended method(s) involving only clinical source(s); 2) recommended method(s) involving non-clinical source(s); 3) non-recommend method(s) involving only clinical source(s); and 4) non-recommended method(s) involving non-clinical source(s). We deemed abortions in group four as the most unsafe [15].

Analysis

We conducted univariate analyses of respondent and confidante characteristics. Due to questionnaire length constraints, we only collected information on confidantes’ age and education. We made a number of adjustments to the confidante data to improve the validity of the abortion incidence and safety estimates. The confidante estimates included all confidante pregnancy removals and period regulations that respondents reported with certainty (response option “Yes, I am certain”) or less certainty (response option “Yes, I think so”) when they could still provide the specific method(s) the confidante used. Inclusion of the less certain abortions helped to counteract respondent’s incomplete knowledge of their confidante’s abortions (i.e. transmission bias). We also adjusted the confidante estimates for potential selection bias resulting from the fact that some respondents reported zero confidantes. For this adjustment, we ran a Poisson model to predict the likelihood of these “missing” confidantes having had an abortion in the prior year. This model regressed the socioeconomic characteristics of the confidantes and the respondents with no confidantes on the available confidante abortion incidence data. We then used the model to predict the likelihood of the “missing” confidantes having had a recent abortion based on the corresponding respondents’ characteristics. We used this information to create a new variable that combined respondent reported confidante abortion data for those with confidantes, and the predicted probability of abortion in the prior year for the confidantes who were not in the sample because they had no close friends who we could have captured in the respondent sample. Research on mortality rate estimation using survey data has employed a similar modeling approach [16]. To ensure these confidante data had characteristics that reflected the population of reproductive aged women in Cote d’Ivoire, we constructed post-stratification weights using the weighted respondent data distributions as the reference.

We separately calculated the one-year pregnancy removal and period regulation incidence rates. We were unable to collect data on month of the event due to questionnaire length constraints, thus we included events from 2017 through the date of interview in 2018. To convert this to an annualized one-year incidence rate, we divided the number of events in 2017 and 2018 by the number of woman-years between January 1, 2017 through the date of the interview in 2018; each respondent contributed on average 1.55 woman-years. We then multiplied the value by 1,000 to generate the approximate one-year incidence rate per 1,000 women age 15 to 49. We scaled the standard errors in the same manner. We also calculated the combined pregnancy removal and period regulation one-year incidence rate (which we refer to as “likely-abortion”). To calculate the final one-year incidence rates of induced abortion, we averaged the pregnancy removal rate and the likely-abortion rate. We averaged the two point estimates because we believe the pregnancy removal data fails to capture some abortions (that women may not view as abortions or are not willing to admit are abortions) while the period regulation data likely include some experiences that we would not consider to be abortions. We generated all these estimates separately for respondents and confidantes.

We calculated one-year pregnancy removal incidence rates, likely-abortion incidence rates, and the associated averages overall and by age and education for respondents and confidantes; we also calculated these rates by residence and wealth for respondents, for whom we had data on these characteristics. The final incidence analyses involved bivariate and multivariable logistic regression to determine which characteristics were independently associated with experiencing a recent likely-abortion in the approximately one year prior to the survey (2017 through beginning of 2018). We used the unadjusted confidante likely-abortion dichotomous incidence data in order to conduct the logistic regression analyses as the model assumes a Bernoulli distributed outcome variable whereas the Poisson predicted confidante incidence variable is continuous.

The abortion safety analyses first assessed the overall distribution of safety for respondents and confidantes along the two dimensions previously described. We separately estimated the proportion of respondents and confidantes who experienced the most unsafe abortions (i.e. those involving non-recommended methods from non-clinical sources) overall and by age and education for both respondents and confidantes, and residence and wealth for respondents only. We then conducted bivariate and multivariable logistic regressions to examine which characteristics were independently associated with increased odds of experiencing a most unsafe abortion. The safety analyses do not include any Poisson imputed safety data, unlike the incidence calculations. For the final analysis we estimated the one-year incidence rate of the most unsafe abortions and the corresponding annual number of most unsafe abortions in Côte d’Ivoire.

We conducted all analyses in Stata version 15.1 [17]. We weighted results using the Taylor linearization method and calculated standard errors using a robust variance estimator to account for the complex sampling design and clustering, respectively.

Results

Sample characteristics

The final sample included 2,738 respondents, 64.1% of whom reported having at least one close female confidante, resulting in a confidante sample of 1,756 women (Table 1). The average age of respondents was 28.5, and the majority had little formal schooling, with 45.2% having never attended school and 25.9% having attended primary school. Approximately two-thirds (64.8%) of respondents were currently married or cohabitating. The majority of women were religious (88.9%), primarily identifying as Muslim (39.5%) or Catholic (20.3%). Respondents represented a range of ethnic groups, with the largest proportion identifying as Akan (34.6%), 20.8% as a non-Ivoirian ethnicity, and 20.8% as Mande. One-quarter of participants had no children, while 32.2% had 1 to 2 children, 21.5% had 3 to 4 children, and 20.6% had five or more children. The majority of participants resided in urban parts of the country (61.5%). Confidantes were not significantly different from respondents in terms of age and education level.

Table 1. Characteristics of female respondents age 15 to 49 and their closest female confidantes age 15 to 49 in Côte d'Ivoire1.

Respondent Unadjusted Confidante Adjusted Confidante2
N % N % N %
Mean age 2,738 28.5 1,756 29.0 2,738 28.8
Age
15–19 542 20.1 305 17.9 484 19.0
20–24 500 18.1 307 17.9 481 17.8
25–29 495 17.9 298 16.0 470 17.2
30–34 436 16.3 306 18.3 462 17.2
35–39 351 12.8 255 13.6 370 12.7
40–44 262 9.4 166 9.4 275 9.7
45–49 152 5.5 119 6.9 196 6.4
Education
Never 1,254 45.2 773 42.8 1,267 45.3
Primary 714 25.9 366 20.7 621 24.7
Secondary 615 23.0 484 28.2 672 23.9
Higher 152 6.0 134 8.3 176 6.5
Marital status
Currently married/cohabiting 1,767 64.8 -- -- -- --
Divorced or separated/widowed 126 4.4 -- -- -- --
Never married 844 30.8 -- -- -- --
Religion of household
Muslim 1,148 39.5 -- -- -- --
Catholic 544 20.3 -- -- -- --
Evangelical 406 15.4 -- -- -- --
Other 382 13.7 -- -- -- --
No religion 258 11.1 -- -- -- --
Ethnicity of household
Akan 889 34.6 -- -- -- --
Mande (nord and sud) 575 20.8 -- -- -- --
Gur 404 14.4 -- -- -- --
Other Ivoirian 274 9.3 -- -- -- --
Other non-Ivoirian 594 21.0 -- -- -- --
Parity
0 704 25.8 -- -- -- --
1–2 867 32.2 -- -- -- --
3–4 590 21.5 -- -- -- --
5+ 572 20.6 -- -- -- --
Residence
Rural 1,062 38.5 -- -- -- --
Urban 1,676 61.5 -- -- -- --
Mean number of confidantes 2,720 0.8 -- -- --
Total 2,738 100.0 1,761 100.0 2,738 100.0

Abortion incidence

The overall one-year likely-abortion incidence (pregnancy removal and period regulation combined) in Côte d’Ivoire was 36.9 (95% confidence interval (CI) 25.4–48.5) per 1,000 women of reproductive age when using respondent data. The adjusted confidante likely-abortion incidence was higher at 50.0 (95% CI 41.9–58.1) per 1,000 women. Excluding the reported period regulations, the pregnancy removal incidence for respondents and confidantes were 18.8 (95% CI 11.8–25.8) and 31.5 (95% CI 24.8–38.1) for respondents and confidantes, respectively. Averaging these estimates, we calculated a final one-year induced abortion incidence of 27.9 (95% CI 18.6–37.1) per 1,000 women of reproductive age based on self-reports and 40.7 (95% CI 33.3–48.1) per 1,000 based on confidante data. The subsequent results are based on the average of pregnancy removal and pregnancy removal/period regulation incidences, which we simply refer to as abortion.

Respondents 20 to 24 years old had the highest one-year abortion incidence at 44.2 abortions per 1,000, while confidantes 25 to 29 years old had the highest rates at 60.4 per 1,000 (Fig 1). Higher levels of education were associated with higher one-year abortion incidence among respondents: women with higher than a secondary education had an abortion incidence of 45.5, those with secondary schooling had an incidence of 36.8, and those with primary education had an incidence of 29.9. Trends differed somewhat for confidantes, with the highest incidence observed both among those who attended higher education (49.9), and those who had attended primary school (51.1). For both groups, the lowest abortion incidence was among women with no formal education, at 19.9 among respondents and 32.3 among confidantes. For respondents, the likelihood of abortion did not differ by residence, with 26.4 abortions per 1,000 in rural areas compared to 28.8 in urban areas. Additionally, wealthier respondents were more likely to have had a recent abortion. Examining the ratio of confidante to respondent abortion incidences, women age 15 to 19 were the least likely to report their own abortion experiences while women with primary education or less were less likely to report than women with higher levels of education.

Fig 1. One-year incidence of abortion (average of pregnancy removal and period regulation rates) per 1,000 women ag 15 to 49 among female respondents and their closest female confidantes in Côte d’Ivoire by background characteristics.

Fig 1

In our logistic regressions, we found that being age 20 to 24 (compared to those age 15 to 19) was significantly associated with greater abortion incidence for respondents, while older confidantes (45 to 49) were significantly less likely to have had a recent abortion (Table 2). Greater education was positively associated with recent abortion for respondents and remained so in the multivariable regression while this factor did not rise to the level of significance for confidantes (Table 2). Place of residence (i.e. rural or urban) and wealth were not significantly associated with abortion incidence for respondents.

Table 2. Bivariate and multivariate regressions of characteristics associated with experiencing a recent likely-abortion among Côte d'Ivoire respondents and confidantes age 15 to 491.

Respondent (n = 2,733) Confidante (n = 1,760)
OR 95% CI aOR 95% CI OR 95% CI aOR 95% CI
Age
15–19 1.00 -- -- 1.00 -- -- 1.00 -- -- 1.00 -- --
20–24 2.03 1.22 3.38 2.14 1.29 3.57 0.84 0.37 1.92 0.80 0.34 1.91
25–29 1.61 0.97 2.69 1.77 1.03 3.03 1.19 0.68 2.10 1.08 0.56 2.07
30–34 1.09 0.44 2.72 1.24 0.52 2.97 0.58 0.26 1.30 0.53 0.22 1.25
35–39 1.35 0.57 3.19 1.52 0.64 3.62 0.34 0.09 1.32 0.31 0.07 1.27
40–44 0.89 0.41 1.95 1.04 0.48 2.27 0.29 0.08 1.09 0.26 0.06 1.09
45–49 0.52 0.15 1.84 0.59 0.17 2.01 0.06 0.01 0.45 0.05 0.01 0.45
Education
Never 1.00 -- -- 1.00 -- -- 1.00 -- -- 1.00 -- --
Primary 1.45 0.79 2.66 1.35 0.76 2.40 1.56 0.80 3.08 1.57 0.78 3.16
Secondary 1.82 0.99 3.33 1.86 1.11 3.14 1.20 0.63 2.27 0.98 0.48 1.99
Higher 2.42 1.15 5.11 2.38 1.19 4.75 1.57 0.69 3.53 1.42 0.62 3.24
Residence
Rural 1.00 -- -- 1.00 -- -- -- -- -- -- -- --
Urban 0.96 0.46 2.02 0.65 0.36 1.21 -- -- -- -- -- --
Wealth quintile
Poorest 1.00 -- -- 1.00 -- -- -- -- -- -- -- --
Second poorest 1.00 0.57 1.74 1.03 0.58 1.80 -- -- -- -- -- --
Middle 0.91 0.34 2.48 1.00 0.40 2.50 -- -- -- -- -- --
Second wealthiest 1.48 0.56 3.91 1.70 0.76 3.80 -- -- -- -- -- --
Wealthiest 1.19 0.49 2.88 1.18 0.52 2.64 -- -- -- -- -- --

1Bolding indicates statistical significance at the p<0.05 level

Abortion safety

The majority of likely-abortions (pregnancy removal and period regulation combined) reported by women in the study were unsafe. Among respondents, 62.4% had likely-abortions that would be categorized as most unsafe (involving non-recommended methods and non-clinical providers), while 78.5% of confidantes had most unsafe likely-abortions (Table 3). Approximately one-third (32.7%) of respondents had the most safe likely-abortions, involving recommended methods and a clinical provider, while only 18.2% of confidante reported abortions were classified as most safe. Very few respondents or confidantes used recommended methods with a non-clinical provider (3.0% and 2.4%) or non-recommended methods with a clinical provider (1.9% and 0.9%). Among likely-abortions reported in the last five years, a larger percentage of respondent and confidante likely-abortions were considered most unsafe; 71.5% and 79.9%, respectively (estimates not shown).

Table 3. Safety of most recent reported likely-abortion among female respondents age 15 to 49 and their closest female confidantes age 15 to 49 in Côte d'Ivoire.

Respondent Confidante
Estimate N Estimate N
Recommended method, clinical provider 32.7 198 18.2 75
Recommended method, non-clinical provider 3.0 21 2.4 11
Non-recommended method, clinical provider 1.9 18 0.9 6
Non-recommended method, non-clinical provider 62.4 408 78.5 322
Total 100.0 645 100.0 414

Abortion safety varied by respondent and confidante sociodemographic characteristics (Fig 2). Among respondents, the youngest women (age 15 to 19) had the most unsafe likely-abortions (78.0%), while among confidantes the older women had the most unsafe likely-abortions (91.3% among women 40 to 44). Among both respondents and confidantes, those with no formal education were most likely to have had the most unsafe likely-abortion (72.9% and 88.9%), compared to those with higher education who had the lowest levels of most unsafe (46.2% and 56.7%). Women in rural settings were more likely than those in urban settings to have the most unsafe likely-abortions, with 74.9% of respondents in rural parts of the country having the most unsafe likely-abortions. Based on respondent household wealth data, the poorest women were also most likely to have the least safe likely-abortions (80.1%); the proportion of likely-abortions categorized as most unsafe decreased steadily, with the wealthiest women least likely to have a most unsafe likely-abortion (44.4%).

Fig 2. Percentage of most recent likely-abortion among female respondents and their closest female confidantes in Côte d’Ivoire that were the most unsafe by background characteristics.

Fig 2

In the multivariable analysis conducted among respondents reporting a likely-abortion, wealth remained significantly associated with unsafe abortion, while age, education and residence were no longer statistically significant (Table 4). In the confidante regressions, age and education were significantly associated with unsafe likely-abortion in both the bivariate and multivariate analyses, with increasing educated associated with reduced likelihood of having a most unsafe likely-abortion and older age and adolescence associated with increased likely of having a most unsafe likely-abortion (Table 4).

Table 4. Bivariate and multivariate regression of characteristics associated with experiencing a most unsafe likely-abortion among Côte d'Ivoire respondents and confidantes age 15 to 491.

Respondent (n = 645) Confidante (n = 414)
OR 95% CI aOR 95% CI OR 95% CI aOR 95% CI
Age
15–19 1.00 -- -- 1.00 -- -- 1.00 -- -- 1.00 -- --
20–24 0.44 0.19 1.03 0.51 0.22 1.20 3.41 1.19 9.81 3.81 1.26 11.52
25–29 0.62 0.29 1.32 0.67 0.30 1.47 1.16 0.49 2.71 1.20 0.47 3.07
30–34 0.38 0.17 0.88 0.42 0.17 1.00 1.48 0.55 3.99 1.33 0.49 3.65
35–39 0.36 0.15 0.84 0.42 0.17 1.04 1.93 0.67 5.60 1.94 0.69 5.46
40–44 0.43 0.16 1.11 0.50 0.19 1.32 4.88 1.15 20.80 5.29 1.25 22.29
45–49 0.58 0.21 1.61 0.48 0.19 1.22 2.95 0.81 10.80 1.78 0.48 6.64
Education
Never 1.00 -- -- 1.00 -- -- 1.00 -- -- 1.00 -- --
Primary 0.61 0.37 1.00 0.66 0.41 1.07 0.40 0.15 1.05 0.39 0.16 0.99
Secondary 0.44 0.26 0.76 0.62 0.37 1.06 0.33 0.13 0.84 0.33 0.13 0.80
Higher 0.32 0.11 0.96 0.60 0.21 1.76 0.16 0.06 0.43 0.14 0.06 0.35
Residence
Rural 1.00 -- -- 1.00 -- -- -- -- -- -- -- --
Urban 0.41 0.21 0.79 0.91 0.42 2.01 -- -- -- -- -- --
Wealth quintile
Poorest 1.00 -- -- 1.00 -- -- -- -- -- -- -- --
Second poorest 0.75 0.34 1.67 0.78 0.37 1.65 -- -- -- -- -- --
Middle 0.51 0.21 1.24 0.56 0.22 1.40 -- -- -- -- -- --
Second wealthiest 0.38 0.14 0.99 0.46 0.17 1.30 -- -- -- -- -- --
Wealthiest 0.20 0.08 0.48 0.27 0.10 0.73 -- -- -- -- -- --

1Bolding indicates statistical significance at the p<0.05 level

Discussion

This study provides the first national estimates of induced abortion incidence and safety in Côte d’Ivoire. In line with the limited available evidence on abortion pathways in the country, our findings indicate that abortion in Côte d’Ivoire is common and predominantly takes place using non-recommended methods and performed by untrained providers. Our respondent findings indicate there are 27.9 abortions per 1,000 women of reproductive age while the confidante data suggest a higher annual rate of 40.7. Given concerns about underestimation in self-reported data, we believe the confidante incidence is closer to the true rate. Our final 2017 national incidence of 40.7 is just outside the uncertainty range of regional abortion incidence estimates for West Africa from 2010–2014 (31, 90% uncertainty interval 28–39) [18]. Using our incidence estimate and data on the Côte d’Ivoire population, we estimate there were more than 230,000 induced abortions in 2017, the majority of which were unsafe (62.4% for respondents and 78.5% for confidantes). Since more complicated abortions are likely to be more visible to one’s social network, we view the confidante safety estimate as an overestimate. Thus, the respondent finding that 62.4% of abortions were most unsafe is more accurate. This estimate is between the WHO regional least safe (52.1%) and unsafe (84.7%) abortion estimates for West Africa, although our measurement of abortion safety differed [8]. However, the Cote d’Ivoire safety distribution was nearly identical to recent findings from Nigeria, where 63.4% of abortions were most unsafe [15].

Young women (under 30) and women with more education had the highest rates of abortion, while adolescents (age 15–19), less educated women, and the poorest women had the most unsafe abortions. Similar to our findings, Vroh and colleagues (2012) found higher abortion prevalence among women under the age of 25 in their 2007 cross-sectional study in Côte d’Ivoire. However, the authors also found higher occurrence of abortion among women with lower levels of literacy and women residing in urban parts of the country, which are in contrast to our findings. This study only had direct reporting of respondent’s prior abortion experiences, thus their estimates may suffer from differential underreporting more so than our confidante data. In another study of women who had been admitted to gynecological departments, investigators similarly found that the majority of abortions were performed using unsafe abortion methods outside of clinical settings [19]. As a whole, these findings suggest that access to safe abortion methods, including information on how to safely self-manage an abortion, are not equitably available to all groups of women. As in other legally restrictive settings, women with greater education or financial resources are able to access safer abortion care, while more vulnerable women must rely on less safe abortion methods, putting them at greater risk of abortion-related morbidity and mortality [20]; a recent study from Nigeria corroborate these findings [21]. Additionally, the methods and sources used for recent abortions suggests that the safety profile of abortions in Côte d’Ivoire is not improving; we estimate the rate of most unsafe abortions in recent years to be 25.4 based on our final incidence and safety estimates.

This study is not without limitations. The primary limitation is our inability to validate the abortion incidence or safety estimates. Although we believe the confidante measure is more accurate than the respondent estimate given concerns about underreporting with self-reported abortion data, we cannot confirm this using an external, objective measure. While other work we have done demonstrates incomplete sharing of abortions between respondents and confidantes [14], analytic decisions we made to include confidante abortions reported with less certainty helped to adjust for these biases. Another concern is that 35.9% of respondents reported no confidantes. We sought to counteract potential selection bias in the confidante data generated by the 64.1% who did report at least one confidante, however, biases may remain. Further work is needed to determine the best confidante relationship definition that optimizes representativeness of the surrogate confidante sample and respondent knowledge of confidante’s abortion experiences. Our inclusion of questions on period regulation when a woman was worried she was pregnant provided a less stigmatizing opportunity for respondents to report their own or their confidante’s abortion, but it may have resulted in the inclusion of non-abortions. By averaging the pregnancy removal and combined pregnancy removal/period regulation estimates, we believe we have reduced the likelihood that our final estimate includes substantial non-abortions. However, our rates do not include repeat abortions over the 2017/2018 period, thus to the extent that Ivorian women are having repeat abortions in quick succession, our rates would be underestimates. Additionally, differential underreporting or sharing of abortions could result in inaccurate bivariate and multivariate relationships. Although not always significant, the incidence patterns across respondents and confidantes were generally similar. The failure to detect statistical significance in many relationships may have been related to limited power as a result of small sample sizes and relatively few reported abortions among some sub-groups. Related to abortion safety, differential underreporting by method and source is the primary concern. Another limitation is related to the potential for misclassification. Women were unable to provide details on the specific surgery or training of their provider, nor were many able to provide details about the specific pills they took. This could result in misclassification in both directions (e.g. facility-based surgery that was actually performed by an untrained provider, medication abortion drugs categorized as “other pills”), which would reduce the likelihood of systematic error in the end results. Lastly, although pilot results indicated correct interpretation of the pregnancy removal and period regulation phrases, the novel framing of these questions could be unintentionally capturing some miscarriages.

Our study has several strengths. Data come from a large, diverse, nationally representative sample. Our use of multiple methods to measure abortion incidence allowed us to improve the validity of incidence estimates and address potential sources of bias. In particular, use of the confidante method helped to address social desirability bias in self-reporting on abortion experiences, and adjustment for “missing” confidantes reduced likelihood of selection bias in the confidante sample. Our study provides individual, nationally representative data on abortion incidence and safety, and includes data on a range of sociodemographic characteristics, which allowed us to estimate these abortion related measures by background characteristics. A further strength of this study is our ability to document patterns of abortion incidence and safety outside the formal health care system, including self-management of abortion using pills and non-recommended methods. Considerable effort was made by the study team to develop and pilot survey questions that captured the range of women’s abortion experiences and methods used in the local context, including questions on period regulation, which may not be captured in typical questions on abortion.

Conclusion

In Côte d’Ivoire, the low prevalence of modern contraceptive use, high unmet need for family planning, and high rates of unintended pregnancy all suggest that women may frequently turn to induced abortion to manage their family size. Our findings support this, indicating that approximately 4% of women have an abortion each year, nearly two-thirds of which are unsafe. The high incidence of unsafe abortion is a significant contributor to the country’s rates of maternal mortality and morbidity; Vroh et al (2012) found that 55.8% of women who reported having had an abortion also reported experiencing post-abortion complications. Consistent with other research, our results suggest that legal restrictions on abortion in Côte d’Ivoire are not keeping women from having abortions, but rather pushing women to use unsafe, potentially dangerous abortion methods. As such, efforts to address high rates of abortion and abortion-related morbidity and mortality are needed. Such measures must include ensuring access to contraceptive services offering a range of methods, quality postabortion care services, and safe abortion for legal indications. Additionally, expanding the conditions under which women can seek safe, legal abortion has the most potential to dramatically reduce the levels of unsafe abortion and abortion-related morbidity and mortality.

Supporting information

S1 Doc. CIR2-female-questionnaire-English-v6-jkp.

(PDF)

S2 Doc. CIR2-female-questionnaire-French-v6-jkp.

(PDF)

Acknowledgments

We would like to acknowledge and thank our in-country team, including the Central Staff, Supervisors and interviewers who were instrumental in the data collection, as well as the women who took time to participate.

Data Availability

Data for this study are publicly available and can be requested online at pmadata.org. The authors used the Cote d'Ivoire Round 2 household/female dataset for this analysis.

Funding Statement

All funding for this study provided by an Anonymous Donor (grant number 127941). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript, and the authors are not aware of any donor competing interests.

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Decision Letter 0

Luisa N Borrell

21 Jan 2020

PONE-D-19-34624

The first national abortion incidence and safety estimates for Cote d'Ivoire

PLOS ONE

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Reviewer #1: Incidence of abortion and safety estimates for Cote d’Ivoire

It is extremely important to come up with estimates of abortion and abortion safety for Cote d’Ivoire. I have questions about the methodology that can likely be addressed by the authors.

Abstract

There is a missing link between abortion is common and its contributing to maternal mortality. I think you need to add that it is often unsafe. Because many countries have high abortion rates and low abortion related morbidity and mortality.

Why are these the first national estimates when you cite the Vroh study. Regardless, claims to primacy should not be in the title.

Intro

What do you mean by “unmet need”? Some estimates don’t actually ask women whether they want to be using a contraceptive. If this is the sort of measure you are using, find another. The high rate of unintended pregnancy may not be a result of unmet need for family planning but instead is a result of a low desire for childbearing.

Line 76. Is anyone ever punished? Reporting that providing abortions is punishable is not relevant if nobody is ever prosecuted for conducting an abortion. How can 47.9% of abortions take place in a health facility? Clearly what is on the law books is not the whole story.

Define unsafe on line 80.

Methods

The description of PMA 2020 as doing research on smartphones is very confusing. Did they do that for this study? Later it says face-to-face interviews.

How does the identification of a confidante work? I would like to know what question is asked – do you have a friend with whom you talk about personal matters like sex and pregnancy?

It seems very difficult to get a woman to describe the procedure that was done to her in an abortion well enough to know if the technique was sound. And certainly impossible that she should know this about a confidante’s abortion. Reports of higher unsafety among confidantes seems likely due to women just not knowing. Women don’t even necessarily know what pills they are given. How were these questions asked? “Surgery” is definitely a confusing term. I hope that wasn’t used. Real medication abortion pills (miso and mife) are safe even when provided by someone untrained.

Why was the term “pregnancy removal” used and what does it mean? Does it include miscarriage management?

Some women (apparently) don’t have confidantes. If this is real and not just an unwillingness to disclose to your interviewer, then these people are not represented in your confidante-based estimates. Do they have higher abortion rates than women with confidantes? If so, your estimate of confidante abortions is underestimated because the type of woman who has no confidantes is not represented. Or vice versa if their abortion rate is lower. Why not have the confidante’s data included along with those with no confidante. Otherwise the sort of people who don’t have friends aren’t represented. How do those with no confidantes differ in terms of willingness to disclose other sensitive info, socioeconomic circumstances, unintended pregnancy risk? It seems important to know who is omitted in the confidante estimates.

Why would the estimate of safety differ by whether it was a respondent or confidante based estimate? Is it because you learn more about the methods and training of the provider when it is the woman’s own abortion? Or is it because you only learn about your confidante’s abortion when it results in a complication?

An annual rate of 39.9 abortions per 1000 women is not the same as 4% of women getting an abortion if the rate includes multiple abortions per woman. Does it?

Typo Page 17 35.9% reported no confidantes. Not no abortions. This seems very high, by the way. What question was asked where more than a third of women have no close friends.

I think it is problematic that you do not compensate women for their time to participate. If you do, change “volunteered” their time.

Reviewer #2: January 19, 2020

Review of Manuscript: PONE-D-19-34624

The manuscript entitled “The first national abortion incidence and safety estimates for Cote d'Ivoire” aims to estimate induced abortion directly and indirectly and examines correlates of unsafe abortion, based on a population-based survey of women of reproductive age. The manuscript is largely a descriptive study and has the potential to contribute to the literature. However, it suffers from the below important methodological and structural issues.

1) Lines 104-124. The method of data collection, the structure of abortion data have not been clearly and precisely described. The authors need to provide a detailed description of method of data collection, structure of the questionnaire, sampling, and representativeness of the sample, and the survey method. I suspect that method of “smart phones” has covered all the study population; because many people are likely that they do not have a cellphone. Therefore, most likely the sample is not representative.

2) Lines 127-169: The authors’ description of “measures” of abortion rates are not at all precise, clear and useful. It is not clear how the abortion incidence rates have been calculated and what kind of data structure have been used to estimate one-year incidence rate and so on. The authors need to write in details and with precision how one-year pregnancy removal rate, one-year abortion incidence rate, combined pregnancy removal/period regulation rate were calculated.

3) The manuscript includes several levels of analysis of abortion: abortion rate estimates and correlates, and multivariate analysis of unsafe abortion. Instead of having an undeveloped manuscript with different mixed results, I would suggest the authors to break down this manuscript into two separate manuscripts: 1) estimating abortion rates; 2) studying unsafe abortion.

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PLoS One. 2020 May 7;15(5):e0232364. doi: 10.1371/journal.pone.0232364.r002

Author response to Decision Letter 0


25 Feb 2020

Dear PLOS ONE Editorial Review Committee and Reviewers,

We would like to thank you for reviewing our manuscript and for the opportunity to revise and resubmit our work for further consideration at your esteemed journal. We appreciate the thoughtful and detailed feedback that the reviewers provided, and we have done our best to incorporate the recommended changes and additions. We feel these edits have strengthened our manuscript and hope you will agree. We look forward to hearing back from you regarding your final decision.

Best,

The Authors

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We updated the file naming to be consistent with journal requirements. We believe the rest of the file is formatted in accordance with PLOS ONE style requirements.

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We have incorporated more details into the methods section, which we describe below in response to the specific reviewer comments. We also uploaded the questionnaires in English and French with the resubmission.

]3. Please provide additional details regarding participant consent. In the ethics statement in the Methods and online submission information, please ensure that you have specified (1) whether consent was informed and (2) what type you obtained (for instance, written or verbal, and if verbal, how it was documented and witnessed). If your study included minors, state whether you obtained consent from parents or guardians.

Interviewers obtained informed, verbal consent from all participants, including minors, who were treated as adults in accordance with local IRB approval. More details and the specific new text that we added to clarify this protocol are provided in response to the specific reviewer comments below.

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Reviewer 1 Comments

Incidence of abortion and safety estimates for Cote d’Ivoire

It is extremely important to come up with estimates of abortion and abortion safety for Cote d’Ivoire. I have questions about the methodology that can likely be addressed by the authors.

Abstract

There is a missing link between abortion is common and its contributing to maternal mortality. I think you need to add that it is often unsafe. Because many countries have high abortion rates and low abortion related morbidity and mortality.

The reviewer makes a good point. We have modified a sentence in the background section of the abstract to clarify:“In Côte d’Ivoire, abortion is legally restricted unless a pregnancy threatens a woman’s life. Yet the limited available evidence suggests abortion is common and that unsafe abortion is contributing to the country’s high maternal mortality.”

Why are these the first national estimates when you cite the Vroh study. Regardless, claims to primacy should not be in the title.

The Vroh et al. study did not provide an abortion incidence. They only provided a lifetime prevalence and restricted the denominator to a population of women who had a child, so we could not determine the population rate from published findings. Upon the reviewer’s feedback, we changed the title to “Abortion incidence and safety in Cote d’Ivoire”.

Intro

What do you mean by “unmet need”? Some estimates don’t actually ask women whether they want to be using a contraceptive. If this is the sort of measure you are using, find another. The high rate of unintended pregnancy may not be a result of unmet need for family planning but instead is a result of a low desire for childbearing.

We were using the standard measure of unmet need from the DHS, which is an algorithm that estimates a population-level measure of unmet need using several related measures of risk of pregnancy, desire for a/another child, and use of contraception. While we acknowledge this measure is not without problems, it is a common measure in the field of demography and is useful in providing a population-level estimate that can be compared across time and geographies. However, given the reviewer’s concerns, we have removed reference to unmet need. With regard to the fact that more than one-third of pregnancies were unintended, we do not think this simply reflects a low desire for childbearing; fertility is high (total fertility rate is 5) and low desire for childbearing could be managed via contraception or avoiding sexual activity, so 35% of pregnancies being unintended is communicating something other than low desire for childbearing.

Line 76. Is anyone ever punished? Reporting that providing abortions is punishable is not relevant if nobody is ever prosecuted for conducting an abortion. How can 47.9% of abortions take place in a health facility? Clearly what is on the law books is not the whole story.

It is not uncommon for abortion to be illegal and punishable with jail time but for abortion to nonetheless be quite common. We do think it is important to describe the official law, regardless of enforcement, but we have added reference to the fact the punishment is rarely, if ever, enforced: “Despite a lack of evidence of enforcement, anyone who provides or assists in providing an abortion—as well as the woman who obtains an abortion herself—can be punished under the law with a prison sentence and fine.”

Define unsafe on line 80.

We added the WHO definition to the second half of that sentence to clarify: “West Africa has some of the highest rates of unsafe abortion in the world, with estimates indicating as many as 85% of abortions in the region are unsafe, which the World Health Organization defines as being performed by an individual lacking the necessary training or in an environment not conforming to minimal medical standards.”

Methods

The description of PMA 2020 as doing research on smartphones is very confusing. Did they do that for this study? Later it says face-to-face interviews.

PMA interviewers use smartphones to implement the survey, but the respondent is not self-administering the questionnaire. We have added the second half of this sentence to clarify: “All women age 15 to 49 were eligible to participate in the face-to-face surveys, which interviewers conducted in French or local languages using smartphones, entering data via an Open Data Kit (ODK) application on the phone.”

How does the identification of a confidante work? I would like to know what question is asked – do you have a friend with whom you talk about personal matters like sex and pregnancy?

We describe the confidante identification process and definition in the second paragraph of the Measures section within the Methods section, but we have made it more explicit that the interviewer defined the confidante relationship to the respondent: “In the abortion module, the interviewer first asked the respondent to indicate the number of close female confidantes she had, defining a close female confidante as a woman age 15 to 49 currently living in Côte d’Ivoire who shares personal information with the respondent and with whom the respondent shares personal information.”

It seems very difficult to get a woman to describe the procedure that was done to her in an abortion well enough to know if the technique was sound. And certainly impossible that she should know this about a confidante’s abortion. Reports of higher unsafety among confidantes seems likely due to women just not knowing. Women don’t even necessarily know what pills they are given. How were these questions asked? “Surgery” is definitely a confusing term. I hope that wasn’t used. Real medication abortion pills (miso and mife) are safe even when provided by someone untrained.

The reviewer makes a good point regarding not knowing the specific type and clinical context of the reported surgery, which we identify as a limitation: “Women were unable to provide details on the specific surgery or training of their provider, nor were many able to provide details about the specific pills they took. This could result in misclassification in both directions (e.g. facility-based surgery that was actually performed by an untrained provider, medication abortion drugs categorized as “other pills”), which would reduce the likelihood of systematic error in the end results.”

Regarding the “surgery” term, interviewers were not reading that option (or others) aloud; they were only selecting it if the woman described having a procedure from a provider. In the Measures section of the Methods section, we added the following additional detail: “Interviewers did not read method and source options aloud; women volunteered their answer and interviewers probed when necessary to determine the appropriate response option to select. In the pilot, women were unable to provide detail regarding the specific surgery type (e.g. dilation and curettage, manual vacuum aspiration), thus interviewers only selected the one “surgery” option if a woman described having a medical procedure.”

We agree with the reviewer that the higher level of unsafe abortions among confidantes may be related to lack of knowledge about the more safe abortions (that don’t result in complications). We explain as much in the Discussion: “Using our incidence estimate and data on the Côte d’Ivoire population, we estimate there were more than 225,000 induced abortions in 2017, the majority of which were unsafe (62.4% for respondents and 78.4% for confidantes). Since more complicated abortions are likely to be more visible to one’s social network, we view the confidante safety estimate as an overestimate. Thus, the respondent finding that 62.4% of abortions are most unsafe is more accurate.”

Why was the term “pregnancy removal” used and what does it mean? Does it include miscarriage management?

During the pilot, we tried to determine more descriptive terminology to refer to abortion instead of simply using the direct translation of “induced abortion”, which is a more stigmatizing or triggering term/phrase. We did not intend for it to include miscarriage management, although it might have. To reduce the likelihood of this, we had an initial preamble in conjunction with the first question of the abortion section that made clear we were talking about “pregnancy removal” in the context of an unintended pregnancy (“Sometimes women are worried they are pregnant or get pregnant when they do not want to be and they do something to remove the pregnancy.”). We added more detail about the piloting and intent of this phrase in the Methods section: “Terminology and question phrasing are particularly important when addressing a sensitive topic like induced abortion. In order to avoid inclusion of miscarriage experiences, interviewers read the following preamble at the outset of the abortion module to indicate that subsequent questions were in the context of an unintended pregnancy: “Sometimes women are worried they are pregnant or get pregnant when they do not want to be and they do something to remove the pregnancy.” To assess respondent interpretation, the pilot questionnaires included quantitative face validity questions where the interviewer asked the respondent to describe how she interpreted or understood the phrases “pregnancy removal” and “period regulation at a time when you were worried you were pregnant”. In total, interviewers conducted 31 pilot surveys in Cote d’Ivoire. Interviewers indicated that 100% of pilot survey respondents the “pregnancy removal” and “period regulation” phrases correctly.”

We also added reference to the possibility that we capture some miscarriages in the limitations of the Discussion section: “Lastly, although pilot results indicated correct interpretation of the pregnancy removal and period regulation phrases, the novel framing of these questions could be unintentionally capturing some miscarriages.”

Some women (apparently) don’t have confidantes. If this is real and not just an unwillingness to disclose to your interviewer, then these people are not represented in your confidante-based estimates. Do they have higher abortion rates than women with confidantes? If so, your estimate of confidante abortions is underestimated because the type of woman who has no confidantes is not represented. Or vice versa if their abortion rate is lower. Why not have the confidante’s data included along with those with no confidante. Otherwise the sort of people who don’t have friends aren’t represented. How do those with no confidantes differ in terms of willingness to disclose other sensitive info, socioeconomic circumstances, unintended pregnancy risk? It seems important to know who is omitted in the confidante estimates.

The reviewer brings up an important potential bias, which we tried to address in the analysis (using a similar approach to what the reviewer suggested, in fact!). We have a separate confidante methods paper that provides a far more detailed description of the confidante method assumptions and adjustments taken to account for violations of method assumptions, which is currently under review. However, an early version of the paper was submitted at a conference last year and is available online (See Bell, SO. 2019. Methodological Advances in Survey-Based Abortion Measurement: Promising Findings From Nigeria, India, and Cote d’Ivoire. Population Association of America Annual Meeting, Austin, TX. Available at: http://paa2019.populationassociation.org/uploads/191027). We have provided more detail on these adjustments in the analysis section of the Methods section in the revised submission. In summary, we found that confidantes had somewhat different characteristics (likely as a result of the “missing” confidantes that correspond to the 35% of respondents who reported no confidante). We essentially imputed the likelihood of these missing confidantes having had a recent abortion using a Poisson model that regresses the characteristics of the respondents who had no confidantes, which is essentially what the reviewer is recommending; we seem to have had the same idea but hadn’t described it sufficiently! It is important to account for these “missing” confidantes as we found the respondents who had no confidantes had significantly different characteristics and were less likely to have reported their own abortion. We also constructed post-stratification weights using the respondent characteristics as a reference point in order to get the surrogate sample (i.e. the confidante data) to be representative of women of reproductive age.

Why would the estimate of safety differ by whether it was a respondent or confidante based estimate? Is it because you learn more about the methods and training of the provider when it is the woman’s own abortion? Or is it because you only learn about your confidante’s abortion when it results in a complication?

We have thought critically about the direction of the bias in comparing the respondent and confidante safety estimates. A priori, we thought the confidante estimates suffer from bias in the direction of overestimating unsafe abortions because respondents (and people generally) would be more likely to know about confidante’s abortions that resulted in complications and perhaps required the involvement and support of more people in the process of terminating the pregnancy and receiving treatment; our results support this hypothesis. Very few respondents reported a confidante’s abortion but were unable to report the method or source so that is unlikely to be the reason the confidante estimate of unsafe abortion is higher. The first paragraph of the discussion details this interpretation: “Using our incidence estimate and data on the Côte d’Ivoire population, we estimate there were more than 225,000 induced abortions in 2017, the majority of which are unsafe (62.4% for respondents and 78.4% for confidantes). Since more complicated abortions are likely to be more visible to one’s social network, we view the confidante safety estimate as an overestimate. Thus, the respondent finding that 62.4% of abortions were most unsafe is more accurate.”

An annual rate of 39.9 abortions per 1000 women is not the same as 4% of women getting an abortion if the rate includes multiple abortions per woman. Does it?

We did not ask about repeated abortions for the respondent or the confidantes. So the 4% is an accurate prevalence based on the available data. We added a sentence to the Methods section to clarify: “We did not collect information about repeated abortions thus these details correspond to the most recent pregnancy removal or period regulation.”

Typo Page 17 35.9% reported no confidantes. Not no abortions. This seems very high, by the way. What question was asked where more than a third of women have no close friends.

Thanks for catching the typo. We have addressed it. And yes, we were similarly surprised by this. We added additional clarity around the confidante definition (“a close female confidante as a woman age 15 to 49 currently living in Côte d’Ivoire who shares personal information with the respondent and with whom the respondent shares personal information”). We think the requirement around mutual sharing of personal information may have biased the relationship and caused women who do have close female friends to not report them thinking they do not meet this criterion. We raise the concern in our discussion of the limitations: “Another concern is that 35.9% of respondents reported no confidantes. We sought to counteract potential selection bias in the confidante data generated by the 64.1% who did report at least one confidante, however, biases may remain. Further work is needed to determine the best confidante relationship definition that optimizes representativeness of the surrogate confidante sample and respondent knowledge of confidante’s abortion experiences.” In future work, we want to experiment with using this phrase and a simple “closest friend” phrase to see how confidante results differ.

I think it is problematic that you do not compensate women for their time to participate. If you do, change “volunteered” their time.

Households received a small amount of phone credit (1000 CFA, which is approximately 1.6 USD), but individual women within the household did not receive an incentive for their participation. In the acknowledgement, we now say, “…as well as the women who took time to participate.”

Reviewer 2 Comments

Review of Manuscript: PONE-D-19-34624

The manuscript entitled “The first national abortion incidence and safety estimates for Cote d'Ivoire” aims to estimate induced abortion directly and indirectly and examines correlates of unsafe abortion, based on a population-based survey of women of reproductive age. The manuscript is largely a descriptive study and has the potential to contribute to the literature. However, it suffers from the below important methodological and structural issues.

1) Lines 104-124. The method of data collection, the structure of abortion data have not been clearly and precisely described. The authors need to provide a detailed description of method of data collection, structure of the questionnaire, sampling, and representativeness of the sample, and the survey method. I suspect that method of “smart phones” has covered all the study population; because many people are likely that they do not have a cellphone. Therefore, most likely the sample is not representative.

Sorry about the confusion; we obviously needed to clarify aspects of our sampling design! We used the same approach as the DHS, relying on the statistical bureau to select enumeration areas (clusters) using probability proportional to size sampling within sampling strata (i.e. urban/rural) and generating weights that represent the inverse of the probability of selection. Sampling had nothing to do with having a cell phone. Interviewers mapped and listed all households in selected clusters and invited women aged 15 to 49 in sampled households to participate. Interviewers used smartphones to conduct the face-to-face interview; respondents did not need a phone to participate, nor did they self-administer the questionnaire on a phone. This section of the methods description now reads as follows: “The sampling strategy relied on an urban-rural stratified cluster design with probability proportional to size selection of 73 enumeration areas (EAs), each of which represented a cluster of approximately 200 households. The National Statistics Institute (INS) selected the EAs from a sampling frame provided by the 2014 General Census of Population and Housing. In each EA, female resident interviewers mapped and listed all households and supervisors randomly selected 35 households from each EA sampling frame created. All women age 15 to 49 identified in selected households were eligible to participate in the face-to-face surveys, which interviewers conducted inn French or local languages using smartphones, entering data via an Open Data Kit (ODK) application on the phone; the English and the French translation of the questionnaire are provided in the supplementary materials (S1–S2). In order for the data to be nationally representative we constructed survey weights, which we calculated using the inverse of the probability of selection, accounting for the probability of EA selection, probability of household selection, and household and female response rates. The final sample included 2,738 de facto women (female response rate 98.1%). The Johns Hopkins Bloomberg School of Public Health and the Comité d'Éthique de la Recherche of Côte d’Ivoire provided ethical approval for this study. Women provided verbal informed consent prior to participation, with minors treated as adults in accordance with local IRB approval. Interviewers indicated receipt of verbal consent by checking a box in the smartphone survey to confirm receive of consent and entering their name as a witness to the consent process.” We hope this additional detail has addressed the reviewer’s concerns.

2) Lines 127-169: The authors’ description of “measures” of abortion rates are not at all precise, clear and useful. It is not clear how the abortion incidence rates have been calculated and what kind of data structure have been used to estimate one-year incidence rate and so on. The authors need to write in details and with precision how one-year pregnancy removal rate, one-year abortion incidence rate, combined pregnancy removal/period regulation rate were calculated.

We have restructured the analysis section and provided additional details on the abortion incidence calculation to improve clarity. Hopefully this addresses the reviewer’s concerns.

“We conducted univariate analyses of respondent and confidante characteristics. Due to questionnaire length constraints, we only collected information on confidantes’ age and education. We made a number of adjustments to the confidante data to improve the validity of the abortion incidence and safety estimates. The confidante estimates included all confidante pregnancy removals and period regulations that respondents reported with certainty (response option “Yes, I am certain”) or less certainty (response option “Yes, I think so”) when they could still provide the specific method(s) the confidante used. Inclusion of the less certain abortions helped to counteract respondent’s incomplete knowledge of their confidante’s abortions (i.e. transmission bias). We also adjusted the confidante estimates for potential selection bias resulting from the fact that some respondents reported zero confidantes. For this adjustment, we ran a Poisson model to predict the likelihood of these “missing” confidantes having had an abortion in the prior year. This model regressed the socioeconomic characteristics of the confidantes and the respondents with no confidantes on the available confidante abortion incidence data. We then used the model to predict the likelihood of the “missing” confidantes having had a recent abortion based on the corresponding respondents’ characteristics. We used this information to create a new variable that combined respondent reported confidante abortion data for those with confidantes, and the predicted probability of abortion in the prior year for the confidantes who were not in the sample because they had no close friends who we could have captured in the respondent sample. Research on mortality rate estimation using survey data has employed a similar modeling approach [16]. To ensure these confidante data had characteristics that reflected the population of reproductive aged women in Cote d’Ivoire, we constructed post-stratification weights using the weighted respondent data distributions as the reference.

We calculated the one-year pregnancy removal incidence rate by determining the number of pregnancy removals reported in 2017 and in 2018 divided by the number of women in each sample. To convert the proportion into a one-year incidence rate, we divided the estimate by the total number of years covered from January 1, 2017 through the date of the interview. We then multiplied the value by 1,000 to generate the one-year estimate of pregnancy removal per 1,000 women age 15 to 49. We scaled the standard errors in the same manner. We also calculated the combined pregnancy removal and period regulation one-year incidence rate (which we refer to as “likely-abortion”). To calculate the final one-year incidence rates of induced abortion, we averaged the pregnancy removal rate and the likely-abortion rate. We averaged the two point estimates because we believe the pregnancy removal data fails to capture some abortions (that women may not view as abortions or are not willing to admit are abortions) while the period regulation data likely includes some experiences that we would not consider to be abortions. We generated all these estimates separately for respondents and confidantes.

We calculated one-year pregnancy removal incidence rates, likely-abortion incidence rates, and the associated averages overall and by age and education for respondents and confidantes; we also calculated these rates by residence and wealth for respondents, for whom we had data on these characteristics. The final incidence analyses involved bivariate and multivariable logistic regression to determine which characteristics were independently associated with experiencing an abortion in the year prior to the survey. We used the unadjusted confidante likely-abortion dichotomous incidence data in order to conduct the logistic regression as the model assumes a Bernoulli distributed outcome variable whereas the Poisson predicted confidante incidence variable is continuous.”

3) The manuscript includes several levels of analysis of abortion: abortion rate estimates and correlates, and multivariate analysis of unsafe abortion. Instead of having an undeveloped manuscript with different mixed results, I would suggest the authors to break down this manuscript into two separate manuscripts: 1) estimating abortion rates; 2) studying unsafe abortion.

While we understand this is a lot of information, we feel it is important to include both incidence and safety estimates in this manuscript as they are related measures that together provide a comprehensive picture of abortion in Cote d’Ivoire. We hope we have laid out the content coherently, in a manner that allows the reader to easily follow the information. On a more practical level, this is a multi-country study and we do not have sufficient project funds to separate each of these country specific abortion papers into two while ensuring open access, which is a priority for us.

Attachment

Submitted filename: PONE-ResponseToReviewers-v2-2020-02-20-sob.docx

Decision Letter 1

Luisa N Borrell

25 Mar 2020

PONE-D-19-34624R1

Abortion incidence and safety in Cote d'Ivoire

PLOS ONE

Dear Dr. Bell,

Thank you for submitting your manuscript to PLOS ONE. After careful consideration, we feel that it has merit but does not fully meet PLOS ONE’s publication criteria as it currently stands. Therefore, we invite you to submit a revised version of the manuscript that addresses the points raised during the review process.

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PLoS One. 2020 May 7;15(5):e0232364. doi: 10.1371/journal.pone.0232364.r004

Author response to Decision Letter 1


6 Apr 2020

Dear PLOS ONE Editorial Review Committee and Reviewers,

We would like to thank you for a second opportunity to revise and resubmit our manuscript. We believe we have clarified and addressed the reviewer concerns and look forward to hearing back from you regarding the final decision.

Best,

The Authors

Reviewer 2

The revised manuscript has improved significantly; I really appreciate the authors for addressing most of the concerns that I raised in the first round of my review. However, there are serious problems in the calculation of abortion rates, based on the new description of calculation of abortion rates, which make the manuscript unpublishable if the authors cannot address them given the nature of data they have collected.

1) Lines 232-243. Please make it clear whether the number of abortions (each specific one: pregnancy removals, period regulations, et.) in the numerator of all of the rates you calculated is “life-time” incidences or only the abortions happened in the year preceding the interview. For example, when you say, “We calculated the one-year pregnancy removal incidence rate by determining the number of pregnancy removals reported in 2017 and in 2018 divided the number of pregnancy removals reported in 2017 and in 2018”. Do you mean all pregnancy removals that a woman has had over her reproductive lifetime (say, from age 15 to the time of the interview) or the number of pregnancy removals that occurred over the year before the interview. If the number of incidences in the numerator of the calculated rate is “life-time” abortions, then your estimated rates cannot be one-year rate, you should use the number of incidences over the past year (before the date of the interview); in this case, you should have asked date of abortions in the questionnaire. Have you done this? If you clarify the structure of data that you have collected in the questionnaire can be helpful here; I don’t see English translated copy of the questionnaire in the revised manuscript. How did you determined the number of abortions in 2017 or 2018?

- From what you have written in Line *** (“The final incidence analyses involved bivariate and multivariable logistic regression to determine which characteristics were independently associated with experiencing an abortion in the year prior to the survey.”, I gather that you have calculated the abortion rates for the abortions that happened in the 12-months before the interview. If this is the case, please revise your rates based on what I have discussed above.

Response: Our paper reports on the one-year abortion incidence rate, not lifetime incidence. The numerator for each rate is the number of events (i.e. pregnancy removal, period regulations, or the combination) in 2017 and 2018 up to the date of the interview. However, the denominator accounted for the additional 0.55 year in 2018 as we divided by the total number of woman-years so that the result, when multiplied by 1,000, represents the approximate one-year incidence rate per 1,000 women of reproductive age. We clarified this approach in the methods section: “We separately calculated the one-year pregnancy removal and period regulation incidence rates. Since we were unable to collect data on month of the event, we included events from 2017 through the date of interview in 2018. To convert this to an annualized one-year incidence rate, we divided the number of events in in 2017 and 2018 by the number of woman-years between January 1, 2017 through the date of the interview in 2018; each respondent contributed on average 1.55 woman-years. We then multiplied the value by 1,000 to generate the one-year incidence rate per 1,000 women age 15 to 49. We scaled the standard errors in the same manner.”

Since we cannot do a similar adjustment in the case of the bivariate and multivariate analyses, we reframed the bivariate/multivariate logistic regression analysis as follows to be more accurate: “The final incidence analyses involved bivariate and multivariable logistic regression to determine which characteristics were independently associated with experiencing a recent abortion in the approximately one year prior to the survey (2017 through beginning of 2018).”

The English version of the questionnaire should be attached as a supplemental file for review.

2) Line 174-175. I see here you are saying, “We did not collect information about repeated abortions thus these details correspond to the most recent pregnancy removal or period regulation.” So, did you include the most recent abortion incidence in the numerator of all incidence rates? If this is the case, therefore, you cannot claim that you have calculated “abortion rate” in this paper. Your study is limited to the pregnancy removal of the last pregnancy of women aged 15-49 in the study population. Following point 2 above, abortion rates refer to the total number of abortions that happen in a given period over the women-years of exposure to the risk of abortions in the same period. If you have not done this calculation, the section of abortion estimates is totally incorrect and unpublishable.

Response: The reviewer brings up an important limitation that much of the survey-based abortion literature in low-resource settings also has. We know of no national estimates of repeat abortion and associated timing in Cote d’Ivoire. Data from the US suggests 48% of abortions are repeat, but the average duration between repeat abortions is 44 months (see Jones et al, 2006. Repeat abortion in the US: Occasional Report no. 29). Thus, while this would result in our incidence estimates being biased downward, we do not think the impact would be substantial. The methods section already clarifies that our data do not account for repeat abortion, but we added a sentence to the discussion section to explicitly describe this limitation: “... However, our rates do not include repeat abortions over the 2017/2018 period, thus to the extent that Ivoirian women are having repeat abortions in quick succession, our rates would be underestimates.”

To the reviewer’s other comment regarding abortion incidence calculation, see our prior response.

3) Lines 233-235. Following my pervious concern, you said that “To convert the proportion into a one-year incidence rate, we divided the estimate by the total number of years covered from January 1, 2017 through the date of the interview.” I am wondering how you can do this when the rate you calculated is based on the abortions that happened up to 2017 or up 2018. You cannot extend it to after 2017 or 2018. To calculate an annual rate of abortion, it is correct you divide the total number of abortions that happened in a give period by 1,000 woman-years of exposure to the risk of abortion in the same given period. For example, you should divide the total number of abortions that happened in the three-year period before the interview by the women-years of exposure to the risk of abortion in the same three years.

Response: Our responses to the reviewer’s prior comments have sought to clarify how we calculated the annualized one-year incidence estimates, dividing by the total woman-years over the same period as the numerator, with each woman in the sample contributing on average 1.55 years. We hope this has addressed the reviewer’s methodological concerns.

Attachment

Submitted filename: PONE-ResponseToReviewers2-v2-2020-04-07-sob.docx

Decision Letter 2

Luisa N Borrell

14 Apr 2020

Abortion incidence and safety in Cote d'Ivoire

PONE-D-19-34624R2

Dear Dr. Bell,

We are pleased to inform you that your manuscript has been judged scientifically suitable for publication and will be formally accepted for publication once it complies with all outstanding technical requirements.

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Academic Editor

PLOS ONE

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You have addressed the reviewers' comments satisfactorily.

Reviewers' comments:

Reviewer's Responses to Questions

Comments to the Author

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Reviewer #2: All comments have been addressed

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2. Is the manuscript technically sound, and do the data support the conclusions?

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Reviewer #2: Yes

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3. Has the statistical analysis been performed appropriately and rigorously?

Reviewer #2: I Don't Know

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4. Have the authors made all data underlying the findings in their manuscript fully available?

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Reviewer #2: (No Response)

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Reviewer #2: (No Response)

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6. Review Comments to the Author

Please use the space provided to explain your answers to the questions above. You may also include additional comments for the author, including concerns about dual publication, research ethics, or publication ethics. (Please upload your review as an attachment if it exceeds 20,000 characters)

Reviewer #2: The second round of revision is satisfactory. The authors only need to acknowledge as a data limitation, that the survey did not collect complete date of abortion (only by year), so calculation of women-years exposure to abortion in the 12 months before the survey is not exact because it is only based on "year" of abortion incidence.

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Reviewer #2: Yes: Professor Amir Erfani

Acceptance letter

Luisa N Borrell

24 Apr 2020

PONE-D-19-34624R2

Induced abortion incidence and safety in Côte d’Ivoire

Dear Dr. Bell:

I am pleased to inform you that your manuscript has been deemed suitable for publication in PLOS ONE. Congratulations! Your manuscript is now with our production department.

If your institution or institutions have a press office, please notify them about your upcoming paper at this point, to enable them to help maximize its impact. If they will be preparing press materials for this manuscript, please inform our press team within the next 48 hours. Your manuscript will remain under strict press embargo until 2 pm Eastern Time on the date of publication. For more information please contact onepress@plos.org.

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on behalf of

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Academic Editor

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Associated Data

    This section collects any data citations, data availability statements, or supplementary materials included in this article.

    Supplementary Materials

    S1 Doc. CIR2-female-questionnaire-English-v6-jkp.

    (PDF)

    S2 Doc. CIR2-female-questionnaire-French-v6-jkp.

    (PDF)

    Attachment

    Submitted filename: PONE-ResponseToReviewers-v2-2020-02-20-sob.docx

    Attachment

    Submitted filename: Review R2.pdf

    Attachment

    Submitted filename: PONE-ResponseToReviewers2-v2-2020-04-07-sob.docx

    Data Availability Statement

    Data for this study are publicly available and can be requested online at pmadata.org. The authors used the Cote d'Ivoire Round 2 household/female dataset for this analysis.


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