Multivariable analysis of predictors of incident anal HRHPV in the Study of the Prevention of Anal Cancer
| HR | 95% CI | P value | |
| Age (years) | 0.076 | ||
| 35–44 | 1 | – | |
| 45–54 | 1.00 | 0.73 to 1.36 | |
| 55–64 | 1.52 | 1.08 to 2.14 | |
| >65 | 1.07 | 0.68 to 1.68 | |
| HIV status | 0.009 | ||
| Negative | 1 | – | |
| Positive | 1.42 | 1.09 to 1.85 | |
| Number of RAI partners with a condom in the last 6 months | <0.001 | ||
| 0 | 1 | – | |
| 1 | 1.72 | 1.26 to 2.35 | |
| 2–5 | 2.42 | 1.81 to 3.23 | |
| >5 | 2.01 | 1.41 to 2.86 | |
| Number of RAI partners without a condom in the last 6 months | 0.074 | ||
| 0 | 1 | – | |
| 1 | 1.04 | 0.79 to 1.38 | |
| ≥2 | 1.37 | 0.99 to 1.90 | |
HRHPV, high-risk human papillomavirus; RAI, receptive anal intercourse.