Table 4.

Independent risk factors for human papillomavirus (HPV) infection among men in the HPV Detection in Men Study.

	OR (95% CI)
Category, parameter	Any HPV	Oncogenic HPV	Nononcogenic HPV
Smoke ≥10 cigarettes per daya	2.3 (1.0–5.3)	2.2 (0.8–5.8)	2.0 (0.8–4.6)
Lifetime no. of female sex partners
1–5	Reference	Reference	Reference
6–10	1.8 (1.0–3.1)	3.0 (1.4–6.7)	1.4 (0.7–2.6)
11–20	2.3 (1.3–4.0)	5.2 (2.4–11.4)	1.6 (0.9–3.0)
≥21	2.5 (1.3–4.6)	7.4 (3.4–16.3)	1.3 (0.7–2.7)
Condom use with vaginal sex during the past 3 months
Less than half the time	Reference	Reference	Reference
At least half the time	0.8 (0.5–1.2)	0.5 (0.3–0.8)	1.0 (0.6–1.6)
No. of female sex partners during the past 3 months
None	Reference	Reference	Reference
1	2.2 (0.6–7.8)	1.6 (0.3–8.4)	1.8 (0.9–3.6)
≥2	2.8 (0.8–10.5)	2.8 (0.5–15.5)	2.9 (1.4–6.3)

NOTE. The no. of subjects varies because of missing data. Odds ratios (ORs) and 95% confidence intervals (CIs) in boldface indicate the variables that were included in the final model for each HPV outcome. ORs for other variables are included for comparison among the 3 outcomes. All ORs are adjusted for date of laboratory analysis.

^aReference category is <10 cigarettes per day.