biostudies-literatureStockton MADoris Duke Charitable FoundationFIC NIH HHSNIMH NIH HHSJohn E Fogarty International CenterNational Institute of Mental Health108831https://www.ebi.ac.uk/biostudies/studies/S-EPMC9830006biostudies-literatureUnknown226<h4>Background</h4>People who inject drugs (PWID) and patients on methadone maintenance therapy (MMT) face severe stigma and discrimination. However, there are limited measures assessing stigma towards individuals with substance use disorders or MMT patients, particularly in Vietnam, and few studies have examined the psychometric properties of existing measures. This study aims to examine the performance of the eight-item Perceived Stigma of Substance Abuse Scale (PSAS), created in the United States, among a population of MMT patients in Vietnam.<h4>Methods</h4>A cross-sectional survey was conducted among 400 adult patients enrolled in an urban MMT clinic. Substance use stigma was measured using the PSAS. We conducted confirmatory factor analysis (CFA) and assessed construct validity, reliDrug and alcohol dependencePsychometric performance of the perceived stigma of substance abuse scale (PSAS) among patients on methadone maintenance therapy in Vietnam.PMC9830006T32 MH096724D43 TW009340Pence BWMughal AYGreene MCGaynes BNStockton MABui QGo VfalsePsychometric performance of the perceived stigma of substance abuse scale (PSAS) among patients on methadone maintenance therapy in Vietnam.<h4>Background</h4>People who inject drugs (PWID) and patients on methadone maintenance therapy (MMT) face severe stigma and discrimination. However, there are limited measures assessing stigma towards individuals with substance use disorders or MMT patients, particularly in Vietnam, and few studies have examined the psychometric properties of existing measures. This study aims to examine the performance of the eight-item Perceived Stigma of Substance Abuse Scale (PSAS), created in the United States, among a population of MMT patients in Vietnam.<h4>Methods</h4>A cross-sectional survey was conducted among 400 adult patients enrolled in an urban MMT clinic. Substance use stigma was measured using the PSAS. We conducted confirmatory factor analysis (CFA) and assessed construct validity, reli2021-01-01T00:00:00Z2021 Sep2025-04-04T07:21:40.914Z2025-04-04T07:21:40.914ZS-EPMC98300063422522210.1016/j.drugalcdep.2021.108831