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Assessing QoL in older people needs specific scales. The aim of this study was to culturally adapt and investigate the psychometric properties of the Persian version of brief Older People\u2019s Quality of Life questionnaire (OPQOL-brief) in an Iranian older population.<\/jats:p>\n<\/jats:sec><jats:sec>\n<jats:title>Methods<\/jats:title>\n<jats:p>This methodological cross-sectional study was conducted among 525 Persian-speaking older people (aged 60 and over), living in Isfahan, Iran. Translation of the OPQOL-brief questionnaire was performed using forward\u2013backward method. Test\u2013retest reliability was evaluated through Intra Class Correlation (ICC) coefficient and internal consistency by using Cronbach\u2019s \u03b1. Construct validity was investigated by using exploratory factor analysis (EFA), confirmatory factor analysis (CFA), and Latent class analysis (LCA). Criterion, convergent and discriminant validities were also assessed.<\/jats:p>\n<\/jats:sec><jats:sec>\n<jats:title>Results<\/jats:title>\n<jats:p>Persian version of the OPQOL-brief showed good test\u2013retest reliability (ICC\u2009=\u20090.842, 95% CI\u2009=\u20090.73\u20130.91; <jats:italic>P<\/jats:italic>\u2009&lt;\u20090.001). Persian OPQOL-brief scale demonstrated high internal consistency (Cronbach\u2019s \u03b1\u2009=\u20090.83). It showed good discriminant validity and differentiated old patients from healthy older individuals (<jats:italic>P<\/jats:italic>\u2009&lt;\u20090.001). Construct validity based on EFA led to extraction of three dimensions (\u201csocioeconomic\u201d, \u201cemotional\u201d, and \u201cphysical\u201d well-being) and the CFA confirmed the adequacy of extracted construct from EFA (CFI\u2009=\u20090.909, PCFI\u2009=\u20090.52, PNFI\u2009=\u20090.5, CMIN\/DF\u2009=\u20093.012, and RMSEA\u2009=\u20090.08). LCA classified participants into three classes in terms of QoL level (low (16%), middle (67%), and high (17%)). Criterion validity and convergent validity revealed significant positive correlations between OPQOL-brief and physical and psychological dimensions of the SF-36.\n<\/jats:p>\n<\/jats:sec><jats:sec>\n<jats:title>Conclusion<\/jats:title>\n<jats:p>The Persian version of the OPQOL-brief is a reliable and valid instrument for assessing QoL with applicability in a broad range of older Persian language population.<\/jats:p>\n<\/jats:sec>","DOI":"10.1186\/s12955-020-01586-8","type":"journal-article","created":{"date-parts":[[2020,10,7]],"date-time":"2020-10-07T10:03:16Z","timestamp":1602064996000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":18,"title":["Persian version of the brief Older People\u2019s Quality of Life questionnaire (OPQOL-brief): the evaluation of the psychometric properties"],"prefix":"10.1186","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1930-0340","authenticated-orcid":false,"given":"Awat","family":"Feizi","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7825-2388","authenticated-orcid":false,"given":"Zahra","family":"Heidari","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2020,10,7]]},"reference":[{"issue":"2","key":"1586_CR1","doi-asserted-by":"publisher","first-page":"e8378","DOI":"10.5812\/ijpbs.8378","volume":"12","author":"M Heravi-Karimooi","year":"2018","unstructured":"Heravi-Karimooi M, Rejeh N, Garshasbi A, Montazeri A, Bandari R. 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