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Screening for substance use disorders in people who use drugs is vital in preventive health care, as it can help to identify problematic use early. Screening can aid in referring those in need, for the most appropriate treatment and care. Thus, preventing them from developing severe substance use disorders with complications. The Drug Abuse Screening Test (DAST-10) is an evidence-based tool widely used to assess the severity of psychoactive drug use. This study aimed to culturally adapt and evaluate the validity and reliability of the Drug Abuse Screening Test (DAST-10) in Sri Lanka.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Methods<\/jats:title>\n                <jats:p>The DAST-10 was culturally adapted, and the nine-item Sinhala version (DAST-SL) was validated using exploratory and confirmatory factor analysis. The validation study was conducted in the Kandy district among people who use drugs, recruited using respondent-driven sampling. Criterion validity of the questionnaire was assessed by taking the diagnosis by a psychiatrist as the gold standard. Cut-off values for the modified questionnaire were developed by constructing Receiver Operating Characteristic (ROC) curves. The reliability of the DAST-SL was assessed by measuring its internal consistency and test re-test reliability.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>The validated DAST-SL demonstrated a one-factor model. A cut-off value of \u2265\u20092 demonstrated the presence of substance use disorder and had a sensitivity of 98.7%, specificity of 91.7%, a positive predictive value of 98.8% and a negative predictive value of 91.3%. The area under the curve of the ROC curve was 0.98. A cut-off score of \u2264\u20091 was considered a low level of problems associated with drug use. The DAST-SL score of 2\u20133 demonstrated a moderate level of problem severity, a score of 4\u20136 demonstrated a substantial level of problems, and a score of \u2265\u20097 demonstrated a severe level of drug-related problems. The questionnaire demonstrated high reliability with an internal consistency of 0.80 determined by Kuder\u2013Richardson Formula-20 and an inter-class correlation coefficient of 0.97 for test re-test reliability.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>The DAST-SL questionnaire is a valid and reliable tool to screen for drug use problem severity in people who use drugs in Sri Lanka.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s12889-024-19288-x","type":"journal-article","created":{"date-parts":[[2024,7,3]],"date-time":"2024-07-03T13:03:47Z","timestamp":1720011827000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Psychometric properties of the modified Drug Abuse Screening Test Sinhala version (DAST-SL): evaluation of reliability and validity in Sri Lanka"],"prefix":"10.1186","volume":"24","author":[{"given":"Sashiprabha Dulanjalee","family":"Nawaratne","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Janaki","family":"Vidanapathirana","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2024,7,3]]},"reference":[{"key":"19288_CR1","unstructured":"United Nations Office on Drugs and Crime. 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For illiterate participants, the information (information regarding the purpose of the study, the procedure, information regarding the researcher, and the risks and benefits of participation) was read by the principal investigator in the presence of an impartial literate witness who spoke the language and a fingerprint was taken before participation in the study. The method of obtaining informed consent from the illiterate participants was approved by the Board of Study in Community Medicine, Postgraduate Institute of Medicine, University of Colombo and the Ethical Review Committee of the Faculty of Medicine, University of Colombo. All measures were taken to ensure that the Declaration of Helsinki was adequately addressed throughout the study and all the methods were carried out in accordance with the relevant guidelines and regulations. The ethical approval for the study was obtained from the Ethical Review Committee of the Faculty of Medicine, University of Colombo (Reference no: EC-19-055).","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval and consent to participate"}},{"value":"Not applicable.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"The authors declare no competing interests.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"1773"}}