Table 2. Factors associated with anal HPV infection among MSM: multivariate logistic analyses.

Factor	Adjusted odds ratio (95% confidence interval)
	Any HPV	Oncogenic	Nononcogenic	Multiple
Age
≤19 years	–	–	0.78(0.08–7.96)	–
20–29years	–	–	0.51(0.20–1.31)	–
30–39years	–	–	0.32(0.11–0.91)*	–
≥40years	–	–	Reference	–
Ever had skin lesions in genital
No	Reference	Reference	–	Reference
Yes	4.15(1.50–11.51)*	2.88 (1.16–7.14)*	–	3.11(0.97–9.98)
Number of anal sex partners in the recent six months
0–2 men	Reference	–	–	–
3–9 men	1.34 (0.56–3.19)	–	–	–
≥10 men	2.66 (0.99–7.18)	–	–	–
HIV serological status
Negative	Reference	Reference	–	Reference
Positive	3.55 (0.98–12.84)	2.06 (0.69–6.17)	–	1.54 0.33–7.12)
Syphilis serological status
Negative	Reference	Reference	–	Reference
Positive	1.12 (0.46–2.73)	0.87 (0.36–2.10)	–	2.43(0.81–7.34)
Chlamydia
Negative	Reference	–	Reference	Reference
Positive	0.76 (0.28–2.03)	–	2.00 (0.93–4.33)	1.46(0.37–5.73)

*P<0.05 in multivariate logistic regression model.