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Table 3 Fertility rates and relative inclusion ratios (RIR) for HIV positive and HIV negative women by age in the urban area of Cameroon, 2004.

From: Association between fertility and HIV status: what implications for HIV estimates?

HIV positive women HIV negative women
Age
bracket
(years)
Number of
births
(A1)
Woman-years
at risk
(B1)
Fertility rate
(95% CI)
C1 = (A1/B1)*1000
Number of
births
(A2)
Woman-years
at risk
(B2)
Fertility rate
(95% CI)
C2 = (A2/B2)*1000
RIR
(95% CI)
C1/C2
15–19 14 84.4 165.8 (98.1–257.9) 196 2139.9 91.6 (79.4–105.1) 1.81 (1.59–2.08)
20–24 20 177.0 113.0 (71.0–171.4) 240 1491.0 161.0 (141.6–182.3) 0.70 (0.63–0.77)
25–29 25 185.3 134.9 (89.5–196.0) 219 1151.6 190.2 (166.2–216.6) 0.71 (0.64–0.77)
30–34 6 104.2 57.6 (23.3–119.8) 140 1050.4 133.3 (113.8–155.4) 0.44 (0.35–0.52)
≥ 35 5 130.6 38.3 (14.2–83.2) 83 1470.8 56.4 (45.3–69.7) 0.68 (0.55–0.79)
Total 70 681.5 102.7 (80.7–129.0) 878 7079.7 124.0 (116.0–1312.4) 0.83 (0.76–0.89)
  1. CI = confidence interval; RIR = relative inclusion ratio; HIV = Human Immunodeficiency Virus
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