Determinants of induced abortion among women received maternal health care services in public hospitals of Arba Minch and Wolayita Sodo town, southern Ethiopia: unmatched case–control study

BACKGROUND: About 210 million women become pregnant per year, with one out of every ten pregnancies terminating unsafely worldwide. In developing countries, unsafe induced abortion is a leading cause of maternal mortality and morbidity. In addition, the burden of public health is also greatest in developing regions. In Ethiopia, abortion was responsible for 8.6% of maternal deaths. Despite the problem's significance, little is known about the factors that lead to women terminating their pregnancies. Therefore, this study aims to identify the factors associated with having induced abortion in public hospitals of Arba Minch and Wolayita Sodo town, Southern Ethiopia. METHODS: An institutional-based unmatched case–control study was conducted among 413 women from 15th April to 15th June 2021 in selected public hospitals of Arba Minch and Wolayita Sodo town, Southern Ethiopia. Cases were women who received induced abortion care services or who received post-abortion care services after being presented to the selected public hospital with an attempt of induced abortion whereas controls were women who came for maternal health care (antenatal or postnatal care) services in selected public hospitals and never had history of induced abortion. The data were collected by pretested and structured questionnaires with face-to-face interviews via Kobo Collect v3.1 mobile tools and analyzed by STATA version14. Logistic regression model was used to identify factors associated with induced abortion. In this study P-value less than 0.05 with 95% CI was declared a result as statistically significant. RESULTS: In this study, 103 cases and 309 controls were participated. Urban residence (AOR = 2.33, 95%CI:1.26, 4.32), encountered first sex at age of 20–24 years (AOR = 0.51, 95%CI:0.27,0.97), multiple sexual partner (AOR = 5.47, 95%CI: 2.98,10.03), women who had one child (AOR = 0.32, 95%CI: 0.10, 0.99), and good knowledge of contraceptives (AOR = 0.12, 95%CI: 0.03, 0.46) were identified as determinants of induced abortion. CONCLUSIONS: Interventions focusing on those identified factors could probably reduce the burden and consequences of induced abortion. Sexual and reproductive health education and family planning programs would target urban dwellers, women who start sexual intercourse between the ages of 15 and 19, women with more than one sexual partner, women with a desire to limit childbearing, and women with poor contraceptive knowledge in order to reduce induced abortion. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12905-022-01695-0.