Multivariate models with independent predictors of concurrent HPV coinfection
| Concurrent coinfection vs. HPV-negative (n = 1,954 visits) | Concurrent coinfection vs. monoinfection (n = 746 visits) | |
|---|---|---|
| Variable | ORa (95% CI) | ORa (95% CI) |
| Baseline exposures | ||
| Age at enrollment | ||
| ≤26 | 1.00 | 1.00 |
| ≥27 | 0.38 (0.17–0.87) | 0.54 (0.24–1.25) |
| Age at first intercourse | ||
| <16 | 1.00 | 1.00 |
| 16–18 | 1.21 (0.76–1.94) | 1.60 (0.97–2.63) |
| ≥19 | 1.10 (0.58–2.06) | 1.18 (0.61–2.27) |
| Number of lifetime sex partners | ||
| 0–1 | 1.00 | 1.00 |
| 2–4 | 3.13 (1.60–6.14) | 1.12 (0.55–2.27) |
| ≥5 | 4.90 (2.38–10.10) | 1.07 (0.51–2.25) |
| Time-dependent exposures | ||
| Number of new sex partnersb | ||
| 0 | 1.00 | 1.00 |
| 1 | 1.64 (1.22–2.20) | 1.59 (1.09–1.34) |
| ≥2 | 2.07 (1.53–2.81) | 1.52 (1.03–2.24) |
| Frequency of sex per weekc | ||
| <1 time | 1.00 | 1.00 |
| 1–3 times | 1.00 (0.75–1.34) | 0.93 (0.62–1.38) |
| 4–6 times | 1.34 (0.95–1.88) | 0.85 (0.50–1.44) |
| 7+ times | 0.96 (0.54–1.67) | 0.43 (0.15–1.21) |
| Oral contraceptive usec | ||
| Regularly | 1.00 | 1.00 |
| Sometimes | 1.26 (0.83–1.90) | 1.88 (1.08–3.26) |
| Never | 0.98 (0.73–1.32) | 1.23 (0.83–1.82) |
| Condom usec | ||
| Regularly | 1.00 | 1.00 |
| Sometimes | 1.19 (0.91–1.56) | 1.24 (0.83–1.83) |
| Never | 1.33 (1.01–1.74) | 1.56 (1.00–2.44) |