Table 6. Stratified analysis by age for selected outcomes.
| Gender | Endpoint | 18 years (N = 752) |
19–20 years (N = 711) |
21–22 years (N = 616) |
Original | |||
|---|---|---|---|---|---|---|---|---|
| AOR [95% CI] 1, 2 | P-value | AOR [95% CI] 1, 2 | P-value | AOR [95% CI] 1, 2 | P-value | AOR [95% CI] 1, 2 | ||
| Males | Knowledge and self-efficacy (% responding “correctly” to questions) | |||||||
| STD acquisition (2 questions) | 0.97 [0.70–1.33] | 0.84 | 1.71 [1.24–2.35] | <0.01 | 1.51[1.30–0.76] | <0.01 | 1.32 [1.08–1.61] | |
| Attitudes–control over sex (% responding “correctly” to questions) | ||||||||
| ≥ 7/10 questions responded to “correctly”3 | 1.11 [0.79–1.56] | 0.55 | 0.98 [0.72–1.33] | 0.91 | 1.64 [1.21–2.24] | <0.01 | 1.18 [0.94–1.48] | |
| Reported sexual behavior (reported on ACASI) | ||||||||
| Did not use condom at last sex4 | 0.97 [0.53–1.78] | 0.91 | 1.57 [1.10–2.24] | 0.01 | 0.73 [0.52–1.03] | 0.07 | 1.03 [0.83–1.29] | |
| Females | Knowledge and self-efficacy (% responding “correctly” to questions) | |||||||
| Pregnancy prevention (2 questions) | 1.63 [1.33–2.01] | <0.01 | 1.02 [0.81–1.28] | 0.85 | 1.53 [1.15–2.03] | <0.01 | 1.32 [1.14–1.55] | |
| HIV-testing self-efficacy (3 questions) | 1.22 [0.92–1.62] | 0.16 | 0.95 [0.70–1.28] | 0.74 | 1.66 [1.27–2.17] | <0.01 | 1.22 [1.03–1.44] | |
| Attitudes–Jewkes scale: gender empowerment (% responding “correctly” to questions) | ||||||||
| ≥ 4/8 responses “correct” 3 | 1.03 [0.74–1.44] | 0.85 | 1.32 [0.94–1.84] | 0.10 | 1.29 [1.03–1.61] | 0.03 | 1.32 [1.05–1.66] | |
Notes
1 GEE with an exchangeable covariance structure and robust standard errors adjusted for a priori confounders (strata, marital status and education).
2 The reference group is the control arm.
3 Cut-off set at the median number of “correct” responses.
4 The reference category includes not reporting the characteristics and does not exclude those who have never had sex.