The supplementary section provides detailed information on the search terms used for databases such as MEDLINE, EMBASE, and GLOBAL HEALTH to identify studies on COPD prevalence. It also includes characteristics of the retained studies on COPD prevalence globally, noting that no overall estimate was reported.The supplementary section provides detailed information on the search terms used for databases such as MEDLINE, EMBASE, and GLOBAL HEALTH to identify studies on COPD prevalence. It also includes characteristics of the retained studies on COPD prevalence globally, noting that no overall estimate was reported.