Table 2.
Multivariable risk factors for condomless sex acts in the past 30 days. TDF2 clinical trial, Botswana 2007–2010.
| Demographic Characteristic or Risk Behavior |
No condomless sex acts | ≥1 condomless sex acts | ||||
|---|---|---|---|---|---|---|
| Odds Ratio |
95% CI | p-value | RateRatio | 95% CI | p-value | |
| Time (per year) | 1.23 | 1.10, 1.37 | .0002 | 0.98 | 0.89, 1.11 | .6910 |
| Treatment Arm Perception |
||||||
| TDF | 1.05 | 0.77, 1.44 | .7422 | 0.95 | 0.73, 1.24 | .7135 |
| Not Sure | 1.06 | 0.80, 1.38 | .6967 | 0.89 | 0.70, 1.11 | .2954 |
| Placebo | REF | REF | ||||
| Sexual Debut | ||||||
| 15 or less | 0.37 | 0.23, 0.61 | <.0001 | 1.65 | 1.14, 2.38 | .0081 |
| 16–17 | 0.49 | 0.32, 0.72 | .0005 | 1.68 | 1.22, 2.31 | .0016 |
| 18–19 | 0.72 | 0.50, 1.04 | .0857 | 1.34 | 1.00, 1.81 | .0551 |
| 20+ | REF | REF | ||||
| Gender | ||||||
| Female | -- | -- | -- | REF | ||
| Male | -- | -- | -- | 1.34 | 1.07, 1.67 | .0100 |
| STI | ||||||
| Yes | 0.43 | 0.27, 0.69 | .0003 | -- | -- | -- |
| No | REF | -- | -- | -- | ||
| HSV-2 | ||||||
| Yes | -- | -- | -- | 1.32 | 1.06, 1.66 | .0147 |
| No | -- | -- | -- | REF | ||
Note: “—“ indicates the variable was not included in that component of the final multivariable model.