RESUMO
PIP: A comparative retrospective study of cervical lesions was conducted in Jalisco, Mexico. 154,784 cytologic studies were done; 36.7% of women observed used either hormonal contraception or the IUD. Dysplasia was found in 1.71/1000 women, but in 1.2/1000 of those using contraception. Incidence of carcinoma in situ was 1.97/1000 overall, but 1.84/1000 for women on contraception. Patients who used contraception, and who had either dysplasia or carcinoma, tended to be younger than patients who did not use contraception; the difference was 5 years for dysplasia, 10 for carcinoma in situ, and 16 for invasive carcinoma. To obtain more reliable data it would be necessary to conduct a perspective study, to augment the number of cases observed, and to prolong investigations for at least 5 years.^ieng