Univariate and multivariable Cox proportional hazards model with time-varying covariates for HIV infection
| HIV infection risk models* | Per 1-risk indicator increase† | Sexual behaviour type | ||
| Protective | Moderate | Fragile | ||
| HR (95% CI) | 3.68 (3.03 to 4.46) | Reference | 2.38 (1.12 to 5.02) | 19.74 (10.28 to 37.91) |
| Adjusted HR (95% CI)‡ | 3.37 (2.76 to 4.11) | Reference | 2.22 (1.05 to 4.71) | 16.53 (8.57 to 31.88) |
*All follow-up records of each participant were included into the model in counting process format.
†The number of risk indicators was in the range of 0–3. Per 1-risk indicator increase meant that the number of indicators was included into the model as a continuous variable.
‡Multivariable Cox regression analysis was adjusted for age, education, marital status, residence time in Tianjin and MSW.
MSW, male sex worker.