Table 2.
1.5 to 5.5-year weighted risk differences and risk ratios for the effect of age-disparate partnership on incident HIV infection among sexually active young women without prevalent infectiona.
| No. infected | Risk (%) | Risk difference (%) | (95% CI, %) | Risk Ratio | (95% CI) | |
|---|---|---|---|---|---|---|
| Year 1.5 | 24 | |||||
| Not age-disparate (<5 years) | 17 | 2.0 | 0 | 0 | 1 | 1 |
| Age-disparate (≥5 years) | 7 | 3.7 | 1.7 | (−1.2 to 4.6) | 1.86 | (0.70–4.91) |
| Year 2.5 | 62 | |||||
| Not age-disparate (<5 years) | 43 | 5.1 | 0 | 0 | 1 | 1 |
| Age-disparate (≥5 years) | 19 | 7.6 | 2.5 | (−1.6 to 6.6) | 1.49 | (0.81–2.75) |
| Year 3.5 | 82 | |||||
| Not age-disparate (<5 years) | 53 | 6.7 | 0 | 0 | 1 | 1 |
| Age-disparate (≥5 years) | 29 | 10.2 | 3.5 | (−1.0 to 8.0) | 1.51 | (0.91–2.52) |
| Year 4.5 | 126 | |||||
| Not age-disparate (<5 years) | 74 | 12.7 | 0 | 0 | 1 | 1 |
| Age-disparate (≥5 years) | 52 | 21.6 | 9.0 | (1.8–16.2) | 1.71 | (1.14–2.55) |
| Year 5.5 | 146 | |||||
| Not age-disparate (<5 years) | 84 | 16.9 | 0 | 0 | 1 | 1 |
| Age-disparate (≥5 years) | 62 | 29.5 | 12.6 | (1.9–23.3) | 1.74 | (1.13–2.68) |
CI, confidence interval.
a
Weighted for age at baseline, intervention assignment at baseline, time-varying school enrolment or completion, time-varying alcohol use.