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International Journal of Pediatrics logoLink to International Journal of Pediatrics
. 2020 Apr 15;2020:6468492. doi: 10.1155/2020/6468492

Prevalence of Neonatal Sepsis in Ethiopia: A Systematic Review and Meta-Analysis

Moges Agazhe Assemie 1,, Muluneh Alene 1, Lieltwork Yismaw 1, Daniel Bekele Ketema 1, Yonas Lamore 2, Pammla Petrucka 3,4, Simegn Alemu 1
PMCID: PMC7180396  PMID: 32351579

Abstract

Introduction

Neonatal sepsis is a systemic infection occurring in infants during the first 4 weeks of life and is a major cause of mortality and morbidities of newborns due to their age-related weak and immature immune systems. In Ethiopia, despite many studies being conducted on neonatal sepsis, the reported findings are inconsistent. The aim of this study is to determine the prevalence of neonatal sepsis to enhance the utility and interpretation of the evidence.

Methods

An extensive systematic review and meta-analysis were performed to extract studies on the prevalence of neonatal sepsis in Ethiopia. The PubMed, Cochrane Library, ScienceDirect, Web of Science, and Google Scholar were systematically searched. Two independent authors selected and extracted the data from each included article. The heterogeneity of included studies was assessed using the Higgins I2 test, and a random-effects model was performed in Stata/se Version 14.

Results

Eighteen studies with a sample size of 10,495 study subjects were included with a reported range of neonatal sepsis from 17% to 78%. The pooled prevalence of neonatal sepsis was 45% (95% CI: 35, 55; I2 = 99.3%, p < 0.01). Early onset neonatal sepsis was found to have a prevalence of 75.4% (95% CI: 68.3, 82.6). Subgroup analysis in the study area (i.e., by region) was calculated revealing the highest neonatal sepsis in Amhara region at 64.4% (95% CI: 44.9, 84.0) and the lowest in Southern Nations, Nationality, and People at 28% (95% CI: 16, 40).

Conclusion

In this review, the prevalence of neonatal sepsis in Ethiopia was found to be high, especially in terms of early onset neonatal sepsis. As a result of the findings, it is important to consider the early and optimal points for interventions to better manage the prevalence and outcomes of neonatal sepsis. Further research is needed to investigate the neonatal sepsis status at different regions and associated factors for neonatal sepsis not yet studied.

1. Introduction

The neonatal period is the most vulnerable time for children's survival. Globally every year about 4 million children die in the first 4 weeks of life, of which 99% of the deaths occur in low- and middle-income countries and of which 75% are considered avoidable [1]. Even though neonatal mortality shows a declining trend over the last 20 years from 50.6 per 1000 live births in 1998 to 28.9 per 1000 live births in 2017 [2], Ethiopia continuous to struggle with a prevalence of about 42% or 81,000 newborn deaths every year [1]. Thus, neonatal sepsis is a major cause of neonatal mortality due to a higher risk of infection because of their weak and immature immune systems related to their age [3, 4].

Neonatal sepsis is a systemic infection occurring in infants at the first 4 weeks of life which can be classified as either early or late onset sepsis [1, 5]. Clinical signs and symptoms of sepsis in newborns vary by gestational age and severity of infection. It is more common for a septic infant to be hypothermic upon presentation [6]. Among all major causes of neonatal deaths, sepsis accounts for 25% of all neonatal deaths in sub-Saharan Africa and southern Asia [7]. Even though there are some improvements to access essential preventive, primary child health care services and sector training [1], neonatal sepsis is still the major cause of newborn deaths resulting in more than one-third of all neonatal deaths [1, 8].

To date, there are inconsistent findings and no systematic review and meta-analysis have been done to enhance the quality and consistency of the evidence. Therefore, the aim of this study was to consider the evidence to determine the prevalence of neonatal sepsis in Ethiopia while serving as a baseline for clinicians and policy makers to design future infrastructure and system strengthening to improve the quality of health.

2. Methods

2.1. Search Strategy

To locate potential articles, PubMed, Google Scholar, Cochrane Library, Web of Science, and ScienceDirect were comprehensively searched between January 27 and June 3, 2019. We extended our search by reviewing reference lists of eligible articles, hand searching for grey literature, and other important literature collections including the Addis Ababa Digital Library and Saint Mary's University repositories. The search protocol was formulated by using common keywords: prevalence AND associated factors AND pediatrics OR infant OR newborn OR neonate's sepsis AND Ethiopia (MeSH Terms). The data selection of this systematic review was presented according to the preferred reporting items for systematic reviews and meta-analysis (PRISMA) guidelines [9]. However, it was not registered on the prospective registration of systematic review and meta-analysis (PROSPERO), which is addressed in Limitations of the Study.

2.2. Eligibility

Included articles were both published and unpublished full text observational study designs reporting the prevalence of neonatal sepsis in Ethiopia, whereas case reports, national reports, clinical studies, and reviews were excluded.

2.3. Outcome Variables

Neonatal sepsis is the main outcome of the study and calculated as the total number of sepsis cases divided by the total number of live birth infants in the study multiplied by 100. Neonatal sepsis can be classified as early onset sepsis acquired from birth to 7 days and late onset sepsis acquired after delivery in the normal newborn nursery, the neonatal intensive care unit, or the community (8 to 30 days). Thus, meta-analysis was performed for two or more studies reporting the same outcomes [10].

2.4. Data Selection and Extraction

Two independent reviewers (SA and YL) screened the downloaded articles and extracted all necessary data from included articles; discussions and mutual consensus were used when discrepancies arose. The extraction format included primary author, study design, classification of sepsis onset, data source, health facility, study area/region, study period, publication year, quality score, sample size, and prevalence with 95% confidence interval.

2.5. Quality Assessment and Appraisal

We had performed a critical appraisal of the research evidence to assess the methodological quality of a study to determine the extent to which a study has addressed the possibility of bias in its design, conduct, and analysis using a standardized data appraisal format adapted from the Joanna Briggs Institute (JBI) checklist [11].

Moreover, to assess the quality of each primary study, the Newcastle-Ottawa Scale (NOS) for cross-sectional studies was adopted [12]. The tool has three main components and uses a star grading system. The first component has possible five stars and considers the credibility on the selection of study groups. The second section of the tool deals with the comparability of the groups with a possibility of two stars. The third section of the grading system focuses on the ascertainment for either exposure or outcome of each original study with a possibility of three stars to be assessed. In addition, quality appraisal of included studies was evaluated by two authors (MA and LY) independently and any discrepancy was resolved by a third author (MAA). Articles with a NOS score of ≥5 stars out of 10 were considered as high quality [13] for the purposes of our work (Supplementary Table).

2.6. Risk of Bias Assessment

The risk of bias assessment of included articles was evaluated by two authors (LY and SA) independently using the Hoy et al. (2012) adapted tool for prevalence studies which consists of 10 items addressing four domains of bias plus a summary risk of bias assessment [14]. Any discrepancy was resolved by discussion and mutual consensus mediated by a third author (MAA).

2.7. Data Processing and Analysis

Data were extracted in a Microsoft™ Excel spreadsheet, and analysis was carried out using Stata/se Version 14 statistical software. Heterogeneity among reported prevalence was assessed by computing p values of Higgins's I2 statistics; I2 was considered as significant at a p value < 0.10 [15]. The DerSimonian and Laird's random-effects meta-analysis model was used to determine the pooled effect size, since the true effect is not the same in all studies [16].

We deal heterogeneity with subgroup analysis, metaregression, and sensitivity analysis. Subgroup analysis was done based on study settings. In addition, an effort to understand the sources of heterogeneity, univariate metaregression analysis was conducted for sample size, publication year, study design, quality score, and midyear study period. Metaregression was used instead of subgroup analyses since it allowed for the use of continuous covariates and permitted the inclusion of more than one covariate at a time. Moreover, sensitivity analysis was computed to assess the influence of a single study on the pooled estimates.

A forest plot was used to describe pooled prevalence with 95% confidence intervals. The size of each box indicated the weight of the study, while each crossed line refers to a 95% confidence interval with the mean effect at the center. The possibility of publication bias was assessed visually with funnel plots, and the objectivity test of Egger's test with p value less than 0.05 was considered evidence of publication bias.

3. Results

3.1. Study Selection

We followed the PRISMA guideline to present the findings of this review. We extracted 1167 articles regarding neonatal sepsis using PubMed, Google Scholar, Cochrane Library, Web of Science, and ScienceDirect. After removing duplicates, 236 articles were screened of which 119 were excluded after reading the title and abstracts. The remaining 117 full text articles were assessed for eligibility. Eighteen studies met the eligibility criteria and were included in the final analysis, as shown in the chart of study selection process (Figure 1).

Figure 1.

Figure 1

PRISMA study selection flow diagram for systematic review and meta-analysis on neonatal sepsis in Ethiopia, 2019 (n = 18).

3.2. Descriptive Summary of Included Neonatal Sepsis Articles

As described in Table 1, these 18 studies were cross-sectional and cohort study designs published between March 2005 and March 18, 2019, along with selected grey literature. In the current systematic review and meta-analysis, 10,495 neonates were included. The sample size by study ranged from 169 in Tikur Anbesa Specialized Hospital (TASH), Addis Ababa [17], to 3418 in Dilchora Referral Hospital (DRH), Dire Dawa City Administration [18]. The prevalence of neonatal sepsis reported was between 22% in Karamara General Hospital (KGH), Somalia region [19], and 78% in Shashemene Referral Hospital (SRH), Oromia region [20].

Table 1.

Descriptive summary of studies included in the systematic review and meta-analysis of neonatal sepsis in Ethiopia.

Authorship (reference) Study period Publication (yr) Study design Facility name Study area (region) Source of data Sample Early onset sepsis Late onset sepsis Prevalence (95% CI)
Woldehanna and Idejene [21] 1/9/1994–31/8/1999 2005 Retrospective GTH Gondar (Amhara) Chart review 330 NA NA 75 (70, 80)
Tewabe et al. [22] 30/4/16-30/5/2016 2018 Retrospective FHRH Bahir Dar (Amhara) Chart review 410 NA NA 24 (20, 28)
Farah et al. [19] 8/2014-2017 2018 Retrospective KGH Karamara (Somalia) Char review 792 NA NA 22 (19, 25)
Kokeb and Desta [23] 1/1/2014- 31/3/2014 2016 Cross-sectional GTH Gondar (Amhara) Primary 325 NA NA 78 (73, 82)
Yismaw and Tarekegn [24] 1/2016–3/2018 2018 Retrospective GTH Gondar (Amhara) Chart review 516 NA NA 78 (74, 81)
Sorsa et al. [25] 4/2016–5/2017 2019 Cross-sectional ATH Asela (Oromia) Primary 902 NA NA 33 (30, 36)
Ketema et al. [26] 9-10,2017 2019 Retrospective JGH Jinka (SNNP) Chart review 335 NA NA 33 (28,39)
Roba and Diro [18] 1/1/2013-10/1/2017 2017 Retrospective DRH Dire Dawa Chart review 3418 NA NA 35 (34, 37)
Woldu et al. [27] 15/4/2014-15/10/2014 2014 Cross-sectional BGH Bishoftu (Oromia) Primary 306 81 19 72 (67, 77)
Serbesa and Iffa [28] 2–5,2017 2019 Cross-sectional ARH Mekelle (Tigray) Primary 301 65.1 34.9 23 (18, 28)
Mersha et al. [29] 22/4/2018-29/6/2018 2019 Cross-sectional WSTH & SCH Wolaita (SNNP) Primary 275 66.5 34.5 34 (28, 39)
Getabelew et al. [20] 2/2016-2/2017 2018 Cross-sectional SRH and MGH Shashemene (Oromia) Primary 244 65 35 78 (73, 83)
Demisse et al. [30] 1/12/2015–31/8/2016 2017 Retrospective GTH Gondar (Amhara) Chart review 769 87.7 12.3 68 (65, 71)
Mengistie et al. [31] 1-2/2018 2018 Cross-sectional HTH & AGH Hawassa (SNNP) Primary 402 80.9 19.1 62 (57, 68)
Alemu [32] 9/2016 2/2017 2017 Retrospective TASH Addis Ababa Chart review 304 80 20 17 (13, 21)
Bayana et al. [33] 1/1/2016-31/12/2017 2018 Retrospective JTH Jimma (Oromia) Chart review 341 NA NA 20 (16, 25)
Gudeta [34] 11/8/2014-1/11/2016 2017 Retrospective TASH Addis Ababa Chart review 356 NA NA 19 (15, 23)
Getachew [17] 11/2017-7/2018 2018 Cross-sectional TASH Addis Ababa Primary 169 NA NA 40 (32, 47)

MGH = Melkaoda General Hospital; WSTH = Wolaita Sodo Teaching Hospital; SCH = Sodo Christian Hospital; HTH = Hawassa Teaching Hospital; AGR = Adare General Hospital; ARH = Ayder Referral Hospital; BGH = Bishoftu General Hospital; FHRH = Felege Hiwot Referral Hospital; ATH = Asela Teaching Hospital; JGH = Jinka General Hospital; JTH = Jimma Teaching Hospital.

3.3. Prevalence of Neonatal Sepsis in Ethiopia

Prevalence of neonatal sepsis was found to be 45% (95% CI: 35, 55; I2 = 99.3%, p < 0.01) which indicates high heterogeneity (Figure 2). Hence, subgroup analysis, based on the study regions, was computed and did not show a significant level of difference/heterogeneity for neonatal sepsis. The highest prevalence was found in Amhara region to be 64% (95% CI: 45, 84), followed by the Oromia region at 51% (95% CI: 24, 77), whereas the lowest prevalence was found in Southern Nations, Nationality, and People at 28% (95 CI: 16, 40) (Figure 3).

Figure 2.

Figure 2

Forest plot of the pooled prevalence of neonatal sepsis in Ethiopia, 2019 (n = 18).

Figure 3.

Figure 3

Subgroup analysis of neonatal sepsis by study area (region) of Ethiopia, 2019 (n = 18).

Among the included studies, seven of the studies reported neonatal sepsis as early and late onset neonatal sepsis classification. Thus, early onset neonatal sepsis was reported in the range of 65% SRH, Oromia, and 88% in Gondar Teaching Hospital (GTH), Amhara. Thus, we found 75.4% (95% CI: 68.3, 82.6) pooled early onset neonatal sepsis (Figure 4).

Figure 4.

Figure 4

Prevalence of early onset of neonatal sepsis in Ethiopia, 2019 (n = 7).

In addition, univariate metaregression analysis was conducted to identify possible sources of heterogeneity for midyear study period, publication year, quality score, and sample size. Again, all of these covariates were found to be statistically nonsignificant (Table 2).

Table 2.

Univariate metaregression for related factors to heterogeneity of neonatal sepsis.

Variables Coefficient p value
Sample size -0.0000 0.62
Publication year -0.0342 0.053
Quality score -0.0055 0.97
Midyear study period -0.0177 0.15

Moreover, sensitivity analysis was computed to evaluate whether the exclusion of any single study altered the magnitude or statistical results of the summary estimate. None of the studies influenced the summary pooled estimates (Figure 5).

Figure 5.

Figure 5

Sensitivity analysis for neonatal sepsis eligible studies in Ethiopia, 2019 (n = 18).

Publication bias was assessed by a funnel plot and absence of bias was represented by substantial symmetry (Figure 6). To confirm the absence of publication bias, Egger's test was employed and did not show the presence of bias (p = 0.627).

Figure 6.

Figure 6

Funnel plot with 95% confidence limits of the pooled prevalence of neonatal sepsis in Ethiopia, 2019 (n = 18).

4. Discussion

Neonates are at a higher risk of infection because of their developmentally weak and immature immune systems. In this study, the pooled prevalence of neonatal sepsis for Ethiopia was found to be 45%, while early onset neonatal sepsis acquired before or during delivery accounted for 75.4%.

This study revealed that pooled prevalence of neonatal sepsis in Ethiopia is consistent with the findings from Cameroon (37.9%) [35], Tanzania (38.9%) [36], and Egypt (45%) [37]. However, our finding is higher than previous studies reported in Iran (18.4%) [38], Mexico (4.3%) [39], and Egypt (8.6%) [40]. This variation could be due to unique cultural features of the population, local obstetrics and neonatal practices, socioeconomic and sexual practice, hygiene, and nutritional differences over settings [41] as well as due to clinical features for sepsis identification, study methodology, and sample size difference which we observed during our study.

The subgroup analysis of neonatal sepsis studies based on region of the country found 64% (95% CI: 45, 84) in Amhara region where studies were from specialized hospital chart review followed by the Oromia region at 51% (95% CI: 24, 77), whereas the lowest was observed in Southern Nations, Nationality, and People at 28%(95% CI: 16, 40) primary study at district hospital. The possible explanation for this variation could be due to the differences in health facility, study design, and sample size variation across studies.

4.1. Limitations of the Study

A number of the studies included in this review had a relatively small sample size which may decrease the power of the study. Secondly, there are studies only from five regions and two city administrations of Ethiopia, which restrict the representativeness of the study. This study also emphasized only the prevalence of neonatal sepsis. In addition, this study is not registered in PROSPERO which could compromise transparency and credibility of the study.

5. Conclusion

In this review, the prevalence of neonatal sepsis in Ethiopia was found to be high, especially in terms of early onset neonatal sepsis. As a result of the findings, it is important to consider the timing and optimal points for interventions to better manage the occurrence of neonatal sepsis. Further research is needed to investigate the neonatal sepsis status at different regions not yet studied and associated factors for neonatal sepsis.

Acknowledgments

The authors of the primary study is acknowledged.

Data Availability

Minimal data can be accessed upon request from first author.

Conflicts of Interest

The authors declare that they have no competing interests.

Authors' Contributions

MAA helped in the conception of research protocol, study design, literature review, data extraction, data analysis, interpretation, and drafting the manuscript. MA contributed on data extraction, quality assessment, data analysis, and manuscript review. LY contributed on data extraction, quality assessment, data analysis, interpretation, and manuscript review. DBK helped in the study design, data analysis, editing, and manuscript review. YL contributed on study design, literature review, data extraction, data analysis, interpretation, and manuscript review. SA helped in the conception of research protocol and study design and contributed on data extraction, quality assessment, data analysis, and manuscript review. PMP contributed on critically review, editing, and validating the research and manuscript content. All authors read and approved of the final manuscript.

Supplementary Materials

Supplementary Materials

Table S2: assessing the risk of bias for the included studies.

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Associated Data

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

Supplementary Materials

Supplementary Materials

Table S2: assessing the risk of bias for the included studies.

Data Availability Statement

Minimal data can be accessed upon request from first author.


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