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Table 3 New infection of human papillomavirus (HPV) among 171 HPV-negative female students according to changes in sexual or smoking habits between baseline and follow-up. Busan, Korea

From: Acquisition of new infection and clearance of type-specific human papillomavirus infections in female students in Busan, South Korea: a follow-up study

Baseline Follow-up No. of women New infection (%) OR (95% CI)
Sexual intercourse     
No No 118 15 (12.7) 1.0
No Yes 20 6 (30.0) 2.9 (1.0–8.8)
Yes Yes, same partner 7 1 (14.3) 1.1 (0.1–10.3)
Yes Yes, new partner 17 5 (29.4) 2.9 (0.9–9.3)
Not reported Yes 9 3 (33.3) 3.4 (0.8–15.2)
Current smoking*     
No No 131 16 (12.2) 1.0
No Yes 6 3 (50.0) 6.1 (0.9–40.9)
Yes Yes/No 12 5 (41.7) 3.3 (0.7–14.6)
Not reported   22 6 (27.3) 2.8 (0.9–8.4)
  1. * ORs for changes in sexual habits were adjusted for the two age groups (years of 15–18 and 19–24); ORs for changes in smoking habits were adjusted for the two age groups and the five different categories of changes in sexual habits. OR: odds ratio; CI: confidence interval.