Incidence of Pelvic Inflammatory Disease
At the end of the 12-month follow-up period, we received
completed follow-up questionnaires from 76 percent
of the 2607 participants. Ninety-six of the women
reported an episode of pelvic inflammatory disease.
The computerized data bases of Group Health Cooperative
identified 57 participants who had received
a diagnosis of pelvic inflammatory disease. Of the 142