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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