Table 5.

Prevalence Ratios (PRs) for Associations Between Human Papillomavirus (HPV) and Frequency of Condom Use

Overall Model	Crude PR (95% CI)a	Adjusted PR (95% CI)b
Any HPV
Always	0.92 (.86–.98)	0.87 (.77–.97)
Not always	Reference	Reference
Any oncogenic HPV
Always	0.84 (.73–.96)	0.81 (.65–1.01)
Not always	Reference	Reference
Only nononcogenic HPV
Always	0.90 (.76–1.08)	0.93 (.69–1.25)
Not always	Reference	Reference
Any HPV by frequency of condom use Interaction of country × condom use, crude model (P = .025)
United States
Always	0.79 (.70–.89)	0.70 (.55–.90)
Not always	Reference	Reference
Brazil
Always	0.96 (.88–1.05)	0.84 (.71–1.01)
Not always	Reference	Reference
Mexico
Always	1.04 (.92–1.19)	1.05 (.89–1.25)
Not always	Reference	Reference
Any oncogenic HPV by frequency of condom use Interaction of country × condom use, crude model (P = .78)
United States
Always	0.66 (.51–.84)	0.72 (.47–1.10)
Not always	Reference	Reference
Brazil
Always	0.91 (.74–1.10)	0.82 (.59–1.16)
Not always	Reference	Reference
Mexico
Always	1.01 (.76–1.34)	0.88 (.60–1.29)
Not always	Reference	Reference
Only nononcogenic HPV by frequency of condom use Interaction of country × condom use, crude model (P = .91)
United States
Always	0.62 (.44–.89)	0.88 (.51–1.50)
Not always	Reference	Reference
Brazil
Always	1.13 (.88–1.44)	1.00 (.63–1.62)
Not always	Reference	Reference
Mexico
Always	0.97 (.67–1.41)	0.89 (.52–1.53)
Not always	Reference	Reference

^aUnadjusted model.

^bMultivariable models are adjusted for monthly alcohol intake, log pack-years of smoking, interaction of country and condom use, and number of female sexual partners in the past 3–6 mo.