Induced Abortion in a Population Entitled to Free-of-Charge Long-Acting Reversible Contraception.

Abstract

To study the rate of induced abortion in a population in whom long-acting reversible contraceptive (LARC) methods are offered free of charge as part of primary health care services. We conducted a register-based cohort study on females aged 15-44 years in the city of Vantaa, Finland. We assessed the rate of abortion among females entitled to LARC methods free of charge by survival analysis in four cohorts: those visiting public family planning clinics and initiating free-of-charge LARC methods during 2013-2014 (LARC cohort, n=2,035); those visiting public family planning clinics not choosing LARC methods (no LARC cohort, n=7,634); and three age-matched control participants for every LARC and no LARC participant from the general population not using the services (nonservice users, n=5,981 and 22,748). The patients were followed up by means of Finnish national registers until February 28, 2016. During the 78,500 woman-years accumulated, altogether 996 patients in Vantaa underwent an abortion (12.3 abortions/1,000 woman-years, 95% CI 11.6-13.1). Of these, 16 abortions occurred in the LARC cohort (3.9/1,000, 95% CI 2.4-6.0), 243 in the no LARC cohort (15.3/1,000, 95% CI 13.5-17.2), and 737 (12.6/1,000, 95% CI 11.7-13.5) among matched nonservice users. The adjusted abortion rate in the LARC cohort was 80% lower than in the no LARC cohort (risk ratio [RR] 0.20, 95% CI 0.11-0.32) and 74% lower than among their matched control participants (RR 0.26, 95% CI 0.15-0.43). In contrast, there was no difference in the abortion rate between the no LARC cohort and the control participants (adjusted RR 1.01, 95% CI 0.87-1.18). When providing a population with free-of-charge LARC methods, the abortion rate was markedly lower among patients initiating free-of-charge LARC compared with patients using the services but not initiating a LARC method. Programs of this kind could be of major importance in populations with high rates of unintended pregnancy.