Long-term follow-up after quinacrine sterilization in Vietnam Long-term follow-up after quinacrine sterilization in Vietnam. Part I: interim efficacy analysis  David Sokal, M.D., Do Trong Hieu, M.D., Debra H Weiner, Dao Quang Vinh, M.D., Trinh Huu Vach, Ph.D., Robert Hanenberg, Ph.D.  Fertility and Sterility  Volume 74, Issue 6, Pages 1084-1091 (December 2000) DOI: 10.1016/S0015-0282(00)01596-X

Figure 1 Five-year cumulative pregnancy rates per 100 women with two quinacrine insertions, by age, with either full or partial correction∗ of pregnancy rates. ∗ Full correction corresponds to the gold-standard pregnancy rate, correcting for both unnecessary menstrual regulations and unreported abortions. The partial rates are corrected for unnecessary menstrual regulations but not for unreported abortions. —•9— <35, fully corrected; -- --, <35, partially corrected; —♦—, ≥35, fully corrected; --■-- ≥35, partially corrected. Sokal. Interim quinacrine efficacy analysis. Fertil Steril 2000. Fertility and Sterility 2000 74, 1084-1091DOI: (10.1016/S0015-0282(00)01596-X)

Figure 2 Four-year cumulative pregnancy rates per 100 women, with two quinacrine insertions, by drug combination. Papaverine use may have been associated with the Hieu insertion technique. —•— ampicillin only; —♦— papaverine only. Sokal. Interim quinacrine efficacy analysis. Fertil Steril 2000. Fertility and Sterility 2000 74, 1084-1091DOI: (10.1016/S0015-0282(00)01596-X)