Table 2 Multivariate analyses of factors associated with multiple HPV infections compared with single infections
Model 1 | Model 2 | Model 3 | |
|---|---|---|---|
Prevalence ratio (95% confidence interval) | |||
Age | |||
16–21 years | 1 | 1 | 1 |
22–25 years | 0.82 (0.75–0.91) | 0.85 (0.77–0.93) | 0.84 (0.75–0.93) |
Race/color | |||
White | 1 | 1 | 1 |
Black | 1.10 (0.95–1.27) | 1.09 (0.94–1.25) | 1.11 (0.95–1.29) |
Brown | 1.03 (0.92–1.17) | 1.05 (0.93–1.18) | 1.05 (0.93–1.20) |
Other | 0.94 (0.67–1.33) | 0.93 (0.65–1.32) | 0.89 (0.60–1.34) |
Relationship status | |||
Single or without partner | 1.34 (1.19–1.52) | 1.29 (1.12–1.48) | |
Dating or casual | 1.26 (1.13–1.42) | 1.20 (1.06–1.36) | |
Married or living together | 1 | 1 | |
Divorced/widowed | 1.17 (0.78–1.76) | 1.10 (0.73–1.67) | |
Smoking status | |||
Nonsmoker | 1 | 1 | |
Smoker | 1.05 (0.91–1.20) | 1.04 (0.89–1.21) | |
Ex-smoker | 1.01 (0.90–1.13) | 1.02 (0.91–1.15) | |
No. of sexual partners in the last year | |||
< 2 | 1 | ||
≥ 2 | 1.13 (1.02–1.25) | ||
Sexually transmitted infection | 1.00 (0.87–1.14) | ||
Age at first sexual intercourse | |||
< 14 years | 1.02 (0.89–1.17) | ||
≥ 14 years | 1 | ||
Type of sex | |||
Exclusively vaginal | 1 | ||
Other sex types excluding vaginal | 0.86 (0.46–1.62) | ||
Vaginal and other sex types | 1.06 (0.95–1.19) | ||
Condom use in the last intercourse | 1.00 (0.90–1.10) | ||