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Background To evaluate whether the use of male condoms reduces the risk of male-to-female transmission of human papillomavirus (HPV) infection, longitudinal studies explicitly designed to evaluate the temporal relationship between condom use and HPV infection are needed.
Methods We followed 82 female university students who reported their first intercourse with a male partner either during the study period or within two weeks before enrollment. Cervical and vulvovaginal samples for HPV DNA testing and Papanicolaou testing were collected at gynecologic examinations every four months. Every two weeks, women used electronic diaries to record information about their daily sexual behavior. Cox proportional-hazards models were used to evaluate risk factors for HPV infection.
Results The incidence of genital HPV infection was 37.8 per 100 patient-years at risk among women whose partners used condoms for all instances of intercourse during the eight months before testing, as compared with 89.3 per 100 patient-years at risk in women whose partners used condoms less than 5 percent of the time (adjusted hazard ratio, 0.3; 95 percent confidence interval, 0.1 to 0.6, adjusted for the number of new partners and the number of previous partners of the male partner). Similar associations were observed when the analysis was restricted to high-risk and low-risk types of HPV and HPV types 6, 11, 16, and 18. In women reporting 100 percent condom use by their partners, no cervical squamous intraepithelial lesions were detected in 32 patient-years at risk, whereas 14 incident lesions were detected during 97 patient-years at risk among women whose partners did not use condoms or used them less consistently.
Conclusions Among newly sexually active women, consistent condom use by their partners appears to reduce the risk of cervical and vulvovaginal HPV infection.
Source Information
From the Departments of Epidemiology (R.L.W., S.O., L.A.K.), Biostatistics (J.P.H.), and Pathology (Q.F., N.B.K.), and the Center for AIDS and STD (K.K.H.), University of Washington, Seattle.
Address reprint requests to Dr. Winer at the University of Washington HPV Research Group, Lake Union Place, Suite 300, 1914 N. 34th St., Seattle, WA 98103, or at rlw{at}u.washington.edu.
Related Letters:
Condom Use and the Risk of HPV Infection
Liang W., Cottler L., Garvin E. C., Callahan C., Winer R. L., Koutsky L. A.
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N Engl J Med 2006;
355:1388-1389, Sep 28, 2006.
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