Alcohol drinking patterns and occurrence of genital warts among Danish adolescents

Background: Under the influence of alcohol adolescents are more prone to engage in unprotected sex, which increases the risk of acquiring genital warts. The study aim was to examine whether alcohol consumption among adolescents is associated with acquiring genital warts. Methods: Health behavior data were extracted from the Danish National Youth Study 2014. Complete data were available for 63,648 students. Number of binge drinking episodes in the past 30 days, frequency of drinking on weekends and total number of drinks consumed during 7-day week were collected by a questionnaire. Information on genital warts for the period between filling the questionnaire in 2014 and December 31, 2018 was retrieved from the Danish National Prescription Register and Danish National Patient Register. Results: Adjusted analysis showed that, compared to students who did not drink alcohol, increasing frequency of binge drinking in the past 30 days was independently associated with greater hazard of acquiring genital warts (1−3 times hazard ratio [HR]: 1.36, 95 % confidence interval [CI]: 1.09−1.69; 4−6 times HR: 1.55, 95 % CI: 1.22−1.96; >6 times HR: 1.84, 95 % CI 1.39−2.45). Compared to students who did not drink alcohol, consistent alcohol drinking every weekend was associated with greater risk of developing genital warts (HR: 1.62, 95 % CI: 1.20−2.17). Total weekly number of alcohol drinks consumed was not associated with occurrence of genital warts. Conclusion: Increased alcohol intake was associated with occurrence of genital warts over 4 year of follow-up. There is an urgent need for change of excessive alcohol intake tendencies among adolescents.