The rate of ectopic pregnancy for 24,589 quinacrine sterilization (QS) users compared to users of other methods and no method in 4 provinces in Vietnam, 1994–1996

Abstract

Objective: To determine the rates of ectopic pregnancy with the use of quinacrine sterilization (QS) compared to other methods and no method (non-users). Methods: Four provinces were selected for their above average numbers of women who had undergone QS: Nam Dinh, Nam Ha, Hai Duong and Hung Yen. Case histories related to surgical treatment of all ectopic pregnancies in these 4 provinces from 1994 through 1996 were collected from all hospitals by researchers from the Ministry of Health in June 1997. Using a questionnaire designed for this study, 120 physicians interviewed every woman in her home who had had an ectopic pregnancy during this period. If deceased, a family member was consulted. All interviews were completed in September 1998. The numbers of users of each method and nonusers were calculated from service statistics and demographic data. Results: Based on 2,551,355 woman-years of exposure, the rate of ectopic pregnancy among users per 1000 woman-years was calculated to be: 0.26 with QS; 0.42 with surgical sterilization (TL) and IUD; 0.45 with the Pill; 0.50 with condoms; 0.78 relying on withdrawal; and 1.18 among non-users. Conclusion: Ectopic pregnancy rates for QS, TL, IUD and the Pill were similar and much lower than the rate for non-users of contraception.