Table 3.
Hazard ratios for the effect of age-disparate partnership on incident HIV infection among sexually active young women aged 13–26 years without prevalent infection, enrolled in HPTN 068 from 2011 to 2017a.
| Model | Unweighted no. of events | Unweighted person-months of follow-up | Unweighted HR (95% CI) | Weighted HR (95% Cl)b | Weighted including TS (95% Cl)c | Weighted including condomless sex (95% Cl)b |
|---|---|---|---|---|---|---|
| HIV | ||||||
| Total | 146 | 59 651 | ||||
| Age-disparate (≥5 years) | 62 | 18 857 | 2.27 (1.64–3.14) | 1.91 (1.33–2.74) | 1.85 (1.26–2.73) | 1.99 (1.22–3.26) |
| Not age-disparate (<5 years | 84 | 40 794 | 1 | 1 | 1 | 1 |
| Continuous maximum age difference (1-year change)c | – | – | 1.05 (1.03–1.07) | 1.05 (1.03–1.08) | 1.05 (1.02–1.08) | 1.05 (1.03–1.08) |
CI, confidence interval; HR, hazard ratio.
a
Weighted models conditioned on the following covariates: age at baseline, time-varying school enrolment or completion, time-varying alcohol use, intervention assignment at baseline.
b
Three HIV cases missing age difference information, one of these is also missing condomless sex.
c
Sixteen HIV cases missing transactional sex information (N = 130 incident cases).