Table 2.
Factors affecting the hazard of return to care. Results from a multivariable Cox proportional hazards model accounting for lack of proportionality in the hazards by the inclusion of the effect of interaction of successful outreach with the logarithm of time included to capture the time dependence of the effect of successful outreach over time.
| HR | 95% CI | p-value | |
|---|---|---|---|
| Age at beginning of gap in care (years) | |||
| 18–24.9 | 1 | ||
| 25–34.9 | 1.202 | (1.129, 1.280) | <0.001 |
| 35–44.9 | 1.378 | (1.292, 1.470) | <0.001 |
| 45+ | 1.500 | (1.401, 1.606) | <0.001 |
| Gender | |||
| Male | 1 | ||
| Female & non-pregnant | 1.053 | (1.018, 1.090) | 0.003 |
| Female & pregnant | 1.175 | (1.100, 1.256) | <0.001 |
| Successful outreach (estimate at 1 year) | |||
| No | 1 | ||
| Yes | 1.427 | (1.336, 1.525) | <0.001 |
| Successful outreach * log(time1) | |||
| per unit | 0.863 | (0.846, 0.880) | <0.001 |
| On ART | |||
| No | 1 | ||
| Yes | 1.601 | (1.542, 1.663) | <0.001 |
| HIV status disclosed | |||
| No | 1 | ||
| Yes | 1.055 | (1.022, 1.089) | 0.001 |
| CD4 at enrollment | |||
| <350 | 1 | ||
| 350+ | 0.951 | (0.914, 0.989) | 0.011 |
| WHO stage at enrollment | |||
| 1/2 | 1 | ||
| 3/4 | 0.994 | (0.961, 1.028) | 0.732 |
| Travel time to clinic | |||
| 0–60 minutes | 1 | ||
| >60 minutes | 1.015 | (0.983, 1.049) | 0.356 |
1
Years since flagged as lost