• A L Coker, B S Hulka, M F McCann, and L A Walton.
• Department of Epidemiology and Biostatistics, University of South Carolina, Columbia 29208.
• Contraception. 1992 Jan 1;45(1):1-10.

AbstractThis North Carolina-based case-control study examined risk factors for cervical intraepithelial neoplasia (CIN). Cases were 103 women with biopsy-confirmed CIN II or III who were recruited from a referral dysplasia clinic. Controls were 258 family practice patients with normal cervical cytology. All subjects were interviewed regarding their sexual and reproductive history, Pap smear screening, active and passive cigarette exposures, and contraceptive use patterns. When compared with controls, cases were half as likely to have ever used barrier methods of contraception; the adjusted odds ratio was 0.5 (95% CI 0.2-0.9). The risk of CIN II/III decreased further with increasing years of barrier method use. Recency, latency, and age at first barrier method use were all associated with a reduced risk of CIN. Men and women should carefully consider the range of benefits of barrier method use as a means to reduce their risk of unwanted pregnancies, sexually transmitted diseases, and cervical neoplasia.

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