Table 2. Univariable and multivariable Cox regression of factors associated with incident maternal HIV infection (n = 1356).
| Univariable Hazard Ratio (HR) | Univariable 95% CI for HR | P | Multivariable HR | 95% CI for multivariable HR | P | |
|---|---|---|---|---|---|---|
| Age at baseline | ||||||
| < 25 years | 1.0 (Ref) | - | ||||
| ≥ 25 years | 2.42 | 0.73–7.94 | 0.14 | - | ||
| Gestational age at first visit | ||||||
| < 14 weeks | 1.0 (Ref) | - | ||||
| ≥ 14 weeks | 0.92 | 0.26–3.15 | 0.90 | - | ||
| Required contraception counselling | 1.32 | 0.28–6.21 | 0.73 | - | ||
| Received support to access social security grant | 0.77 | 0.15–3.79 | 0.75 | - | ||
| Male partner’s initial circumcision status | ||||||
| not circumcised or unknown | 1.0 (Ref) | - | 1.0 (Ref) | - | ||
| circumcised | 0.11 | 0.01–0.86 | 0.035 | 0.22 | 0.03–1.86 | 0.16 |
| Male Partner’s HIV status | ||||||
| uninfected or not tested | 1.0 (Ref) | - | 1.0 (Ref) | - | ||
| known HIV-infected | 52.4 | 6.3–438.3 | <0.0001 | 32.7 | 3.8–282.2 | 0.001 |
| newly diagnosed HIV infection | 202.3 | 56.9–719.0 | <0.0001 | 126.4 | 33.8–472.2 | <0.0001 |