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Table 1 Comparison of selective characteristics at baseline between groups of participants and nonparticipants to the follow-up.

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

Characteristics Nonparticipants Participants P-value
Age (mean) 18.4 Year 18.5 Year 0.366
Smoking 26% 18% 0.062
Alcohol drinking 47% 51% 0.867
Age at menarche (mean) 13.3 Year 13.2 Year 0.199
Sexual intercourse 26% 21% 0.066
Age at first sexual intercourse (mean) 18.3 Year 17.9 Year 0.326
Lifetime multiple sexual partners 13% 12% 0.295
HPV positive 16% 13% 0.381