Table 2 Prevalence of folic acid and iron salt use by pregnant women in the 2015 Pelotas Birth Cohort perinatal study, crude and adjusted prevalence ratios and respective confidence intervals (95% CI) (N = 4270 women)
Iron salts | Folic acid | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Crude analysis | Adjusted analysisa | Crude analysis | Adjusted analysisa | |||||||
95% CI | 95% CI | 95% CI | 95% CI | |||||||
P (%) | PR | (p value) | PR | (p value) | P (%) | PR | (p value) | PR | (p value) | |
Ethnicity | (< 0.001) | (< 0.001) | (< 0.001) | (0.03) | ||||||
White | 68.2 | 1 | 1 | 73.4 | 1 | 1 | ||||
Other | 85.8 | 1.25 | 1.20–1.31 | 1.11 | 1.07–1.16 | 66.6 | 0.90 | 0.85–0.96 | 0.97 | 0.91–1.03 |
Black | 82.8 | 1.21 | 1.15–1.27 | 1.08 | 1.03–1.13 | 62.4 | 0.85 | 0.79–0.91 | 0.91 | 0.85–0.98 |
Education (years) | < 0.001 | < 0.001 | (< 0.001) | (< 0.001)c | ||||||
≤ 4 years | 90.6 | 1.72 | 1.61–1.83 | 1.46 | 1.36–1.56 | 58.6 | 0.71 | 0.65–0.79 | 0.78 | 0.71–0.86 |
5–8 | 87.4 | 1.66 | 1.56–1.75 | 1.45 | 1.35–1.53 | 62.7 | 0.77 | 0.72–0.81 | 0.82 | 0.77–0.87 |
9–11 | 77.3 | 1.46 | 1.38–1.56 | 1.31 | 1.23–1.40 | 69.9 | 0.86 | 0.82–0.89 | 0.88 | 0.84–0.93 |
≥ 12 | 52.6 | 1 | 1 | 81.3 | 1 | 1 | ||||
Family Income b | (< 0.001) | (< 0.001) | (< 0.001) | (0.02) c | ||||||
≤ 1 | 86.4 | 1.93 | 1.68–2.23 | 1.39 | 1.20–1.61 | 57.9 | 0.68 | 0.61–0.74 | 0.82 | 0.74–0.90 |
1.1–3.0 | 80.7 | 1.81 | 1.57–2.07 | 1.39 | 1.20–1.59 | 68.3 | 0.80 | 0.75–0.85 | 0.91 | 0.85–0,97 |
3.1–6.0 | 67.3 | 1.50 | 1.30–1.74 | 1.28 | 1.11–1.48 | 75.8 | 0.88 | 0.83–0.94 | 0.95 | 0.89–1.01 |
6.1–10.0 | 48.8 | 1.10 | 0.91–1.31 | 1.06 | 0.89–1.26 | 77.6 | 0.90 | 0.84–0.98 | 0.92 | 0.85–1.00 |
> 10.0 | 44.6 | 1 | 1 | 85.3 | 1 | 1 | ||||