Please use this link to access this publication: https://www.sciencedirect.com/science/article/abs/pii/S0749379723001320 Introduction Cannabis use for medical purposes is legalized across 39 states and the District of Columbia in the U.S. The objective of this study was to evaluate temporal trends and correlates of cannabis use for medical purposes in the U.S. Methods Data from the 2013−2020 National Survey on Drug Use and Health were used. Since 2013, medical cannabis use has been assessed using a dichotomous question asking whether any medical cannabis use was recommended by a doctor among those who used cannabis in the past 12 months. A modified Poisson model was used to estimate the average annual percentage change in...