Table 2. Crude and adjusted analysis of factors associated with an unmet need for modern contraception in mothers participating in the 2015 Pelotas Birth Cohort.
| Variable | Prevalence of unmet need | Crude analysis | Adjusted analysis | |||||
|---|---|---|---|---|---|---|---|---|
|
|
|
|
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| % | 95%CI | OR | 95%CI | p-valor* | OR | 95%CI | p-valor* | |
| Age (Years) | 0.002 | 0.008** | ||||||
| < 25 | 14.6 | 12.1 – 17.4 | Ref.. | Ref.. | ||||
| 25–29 | 10.9 | 9.0 – 13.1 | 0.7 | 0.5–0.9 | 0.8 | 0.5–1.0 | ||
| 30–34 | 9.0 | 7.2–11.0 | 0.6 | 0.4–0.8 | 0.6 | 0.4–0.8 | ||
| ≥ 35 | 9.4 | 7.8–11.3 | 0.6 | 0.5–0.8 | 0.6 | 0.5–0.9 | ||
| Family income in minimum monthly wages (BRL 998.00) | 0.007 | 0.130 | ||||||
| < 1 | 14.1 | 11.0–18.1 | 1.9 | 1.3–2.8 | 1.5 | 1.1–2.4 | ||
| 1.1–3.0 | 11.6 | 10.2–13.2 | 1.5 | 1.2–2.0 | 1.4 | 1.0–1.9 | ||
| 3.1–6.0 | 7.9 | 6.4–9.9 | Ref.. | Ref.. | ||||
| 6.1–10 | 10.7 | 7.5–15.0 | 1.4 | 0.9–2.2 | 1.4 | 0.9–2.3 | ||
| > 10 | 9.7 | 6.6–14.0 | 1.2 | 0.8–2.0 | 1.3 | 0.8–2.1 | ||
| Education level in years | 0.007 | 0.117 | ||||||
| 0–5 | 16.5 | 12.6–21.3 | Ref.. | Ref.. | ||||
| 5–9 | 11.3 | 9.6–13.5 | 0.6 | 0.4–0.9 | 0.6 | 0.4–0.9 | ||
| 10–11 | 9.7 | 8.1–11.7 | 0.5 | 0.4–0.8 | 0.6 | 0.4–0.9 | ||
| ≥ 12 | 9.5 | 8.0–11.3 | 0.5 | 0.4–0.8 | 0.7 | 0.5–1.0 | ||
| Married or in a stable union | < 0.001 | < 0.001 | ||||||
| No | 16.4 | 13.7–19.5 | 1.9 | 1.5–2.4 | 1.9 | 1.4–2.6 | ||
| Yes | 9.4 | 8.4–10.5 | Ref. | Ref. | ||||
| Received medical advice on how to avoid pregnancy | 0.583 | - | ||||||
| No | 10.4 | 8.9–12.0 | Ref. | |||||
| Yes | 11.0 | 9.7–12.4 | 1.1 | 0.9–1.3 | - | |||
| Possessing health insurance or health plan | 0.398 | - | ||||||
| No | 11.1 | 9.8–12.6 | Ref. | |||||
| Yes | 10.2 | 8.8–11.8 | 0.9 | 0.7–1.1 | - | |||
| Source of payment for hospitalization when the child was born | 0.158 | 0.766 | ||||||
| SUS | 11.2 | 10.0–12.6 | 1.4 | 0.9–2.1 | 1.1 | 0.7–1.8 | ||
| Healthcare insurance | 10.2 | 8.3–12.6 | 1.3 | 0.8–2.0 | 1.2 | 0.7–1.9 | ||
| Private | 8.1 | 5.7–11.4 | Ref. | Ref. | ||||
| Watches TV often | 0.803 | - | ||||||
| No | 10.9 | 8.9–13.4 | Ref. | - | ||||
| Yes | 10.6 | 9.5–11.8 | 0.9 | 0.7–1.3 | - | |||
| Head of the household | 0.007 | 0.047 | ||||||
| Child´s father | 9.1 | 7.9–10.6 | 0.7 | 0.5–0.9 | 0.9 | 0.7–1.1 | ||
| Child´s mother | 12.7 | 11.0–14.7 | Ref. | Ref. | ||||
| Other | 10.4 | 7.9–13.7 | 0.8 | 0.6–1.1 | 0.6 | 04–0.9 | ||
| Number of pregnancies | < 0.001 | 0.001 | ||||||
| 1–2 | 9.9 | 8.9–11.0 | Ref. | Ref. | ||||
| ≥ 3 | 19.0 | 14.9–24.0 | 2.1 | 1.6–2.9 | 1.9 | 1.3–2.6 | ||
| Number of stillborn children after the birth of the child participating in the cohort | 0.261 | - | ||||||
| None | 10.6 | 9.6–11.7 | Ref. | - | - | |||
| At least one | 16.3 | 7.7–31.1 | 1.6 | - | - | |||
| Number of induced abortions or miscarriages after the birth of the child participating in the cohort | 0.047 | |||||||
| None | 10.4 | 9.4–11.5 | Ref. | Ref. | ||||
| At least one | 23.5 | 14.8–35.3 | 2.7 | 1.5–4.7 | 1.9 | 1.0–3.6 | ||
*Likelihood ratio test
**Linear trend test
OR: odds ratio; 95%CI: 95 % confidence interval.