Early incidence rates of precancerous cervical lesions in women using contraceptives

This report describes the continuation of a study on the occurrence of early cervical neoplasia in relation to method of contraception used by women attending Planned Parenthood of New York City, Inc. An earlier paper indicated a small but significant excess in prevalence rates of carcinoma in situ for steroid users compared with diaphragm users. We now estimate incidence rates of carcinoma in situ and lesser precancerous cervical lesions in steroid, diaphragm, and IUD contraceptors who are initially proved free of cervical neoplasia. These data do not prove any statistically significant differences although the estimates exhibit variations not inconsistent with our previous findings. © 1973.