Prevalence of human papillomavirus infection among women in Concordia, Argentina: a population-based study.
Brule, AJ van den
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or =65 years of age. However, low-risk types had similar prevalence (approximately 5%) in all age groups. HPV16 (4.0%), HPV35 (2.6%), and other high-risk types were the most common. Almost half of infections were multiple. Younger women initiated sexual activity earlier and had more partners. The main determinants of HPV detection were lifetime number of sex partners and vaginal discharge. CONCLUSION: A clear pattern of decreasing prevalence of HPV with age was observed. This could be explained by development of immunity against specific types over time or related to a cohort effect associated with a recent spread of HPV in this population after recent changes in sexual behavior.