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Table 2 Risk factors associated with overall HR-HPV infection at baseline by age group

From: A prospective study of age trends of high-risk human papillomavirus infection in rural China

Age-group Risk factors* HPV positive, n (%) Multivariate
    OR (95% CI)
25-40 (n = 2587) Household income (Yuan) § p= 0.023
≤3000 91 (11.2) 1.0
3001-5000 79 (10.1) 0.96 (0.69-1.34)
≥5001 125 (12.7) 1.41 (1.04-1.92)
Marital status   p= 0.007
Married 289 (11.3) 1.0
Others 7 (29.2) 3.48 (1.40-8.66)
Age at first menstruation period (years) § p= 0.027
≤14 140 (10.5) 1.0
15-16 110 (11.6) 1.06 (0.80-1.40)
≥17 46 (15.3) 1.65 (1.14-2.40)
Age at first pregnancy (years) § p= 0.004
≤20 97 (14.5) 1.0
21-23 136 (11.0) 0.77 (0.57-1.03)
≥24 55 (8.5) 0.54 (0.38-0.78)
41-48 (n = 2530) Age at first sexual intercourse (years) §   p< 0.001
≤19 74 (21.1) 1.0
20-22 173 (10.9) 0.49 (0.35-0.67)
≥23 66 (11.2) 0.52 (0.36-0.77)
49-65 (n = 2280) No. of lifetime sex partners §   p= 0.006
1 306 (15.0) 1.0
≥2 54 (22.0) 1.58 (1.14-2.20)
Menopausal status §   p= 0.008
No 48 (11.3) 1.0
Yes 311 (16.8) 1.55 (1.12-2.15)
  1. NOTE: *Only those risk factors of statistical significance in multivariate analysis which was adjusted for study sites, education level, oral contraceptive history, number of sex partners in the past 6 months, number of live births were shown. Age was categorized by tertiles at baseline. Bold type indicates statistical significance (p < 0.05).§Missing values were excluded in the analysis. HPV = human papillomavirus; OR = odds ratio; CI = confidence interval.