Study Population
PDR, Death
MAY
Data were gathered prospectively from nationwide Swedish registers, including the National Patient Register, the Causes of Death Register, the Longitudinal Integration Database for Health Insurance and Labor Market Studies register, and the Micro Data for Analyses of Social Insurance (MiDAS) register. Drug use data were gathered from the Prescribed Drug Register (PDR) from July 2005 to December 2018. The data analysis was conducted from December 1, 2021, to May 24, 2022.All residents aged 16 to 64 years living in Sweden with a registered first-time treatment contact due to MAUD (