biostudies-literatureToffol EJane ja Aatos Erkon SäätiöYrjö Jahnssonin SäätiöAvohoidon tutkimussäätiöe053837https://www.ebi.ac.uk/biostudies/studies/S-EPMC8867378biostudies-literatureUnknown12(2)<h4>Objectives</h4>The relationship between the use of contraception and of psychiatric medications is understudied. We examined whether the current and past use of psychotropic medications is associated with the use and type of hormonal contraception (HC).<h4>Design</h4>Nationwide register-based matched case-control study.<h4>Settings</h4>All fertile-aged (15-49 years) girls and women living in Finland in 2017; data from several national registers.<h4>Participants</h4>294 356 girls and women with a redeemed prescription of HC in 2017, and their same-sized control group of non-users (n=294 356) identified through the Prescription Centre.<h4>Main outcome measures</h4>Associations between the use of psychotropic medications and the use of HC, and the type of HC tested in logistic regression BMJ openAssociations between use of psychotropic medications and use of hormonal contraception among girls and women aged 15-49 years in Finland: a nationwide, register-based, matched case-control study.PMC8867378N/A20207328170062Haukka JHeikinheimo OBut AToffol ELatvala APartonen TfalseAssociations between use of psychotropic medications and use of hormonal contraception among girls and women aged 15-49 years in Finland: a nationwide, register-based, matched case-control study.<h4>Objectives</h4>The relationship between the use of contraception and of psychiatric medications is understudied. We examined whether the current and past use of psychotropic medications is associated with the use and type of hormonal contraception (HC).<h4>Design</h4>Nationwide register-based matched case-control study.<h4>Settings</h4>All fertile-aged (15-49 years) girls and women living in Finland in 2017; data from several national registers.<h4>Participants</h4>294 356 girls and women with a redeemed prescription of HC in 2017, and their same-sized control group of non-users (n=294 356) identified through the Prescription Centre.<h4>Main outcome measures</h4>Associations between the use of psychotropic medications and the use of HC, and the type of HC tested in logistic regression 2022-01-01T00:00:00Z2022 Feb2025-04-04T09:10:26.881Z2025-04-04T09:10:26.881ZS-EPMC88673783519391110.1136/bmjopen-2021-053837