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However, few studies investigate the use of individualised measures and their robustness in terms of quantifying outcomes. In this study, we analysed the psychometrics and feasibility of two individualised outcome measures (PQ and PSYCHLOPS). We followed a cross-sectional methodology, administering the individualised measures and three additional standardised measures (TOP, a measure of psychological health within addiction services; PHQ-9; CORE-OM) to a sample of 93 patients entering substance misuse treatment in four clinical services. The results showed high levels of patient acceptability of the two individualised measures (response rates &gt;\u200995%). The internal reliability was good for both PQ and PSYCHLOPS (Cronbach\u2019s alpha, .79 and .72, respectively). Convergent validity of PQ with standardised measures was weak: Pearson\u2019s <jats:italic>r<\/jats:italic> values for TOP (psychological health), PHQ-9 and CORE-OM were .21, .22 and .27, respectively. In contrast, convergent validity of PSYCHLOPS was moderate: <jats:italic>r<\/jats:italic>\u2009=\u2009.40, .39 and .50, respectively. Convergence between PQ and PSYCHLOPS was weak (<jats:italic>r<\/jats:italic>\u2009=\u2009.28). Experience of previous treatment episodes was associated with higher PQ and PSYCHLOPS scores; PSYCHLOPS but not PQ scores were higher among those opting to complete the questionnaires in written rather than verbal format. Our findings demonstrated that PQ and PSYCHLOPS are reliable and feasible individualised outcome measures for use in substance misuse treatment units, although the lack of strong convergent validity indicates that they may be measuring different underlying constructs. Optimal outcome measurement may involve combining individualised and standardised measures.<\/jats:p>","DOI":"10.1007\/s11469-020-00396-9","type":"journal-article","created":{"date-parts":[[2020,9,10]],"date-time":"2020-09-10T14:02:07Z","timestamp":1599746527000},"page":"704-718","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Personalising Outcome Measurement in Substance Misuse Treatment: the Feasibility and Psychometrics of Two Individualised Outcome Measures"],"prefix":"10.1007","volume":"20","author":[{"given":"Paula","family":"Alves","sequence":"first","affiliation":[]},{"given":"Lu\u00eds","family":"Fa\u00edsca","sequence":"additional","affiliation":[]},{"given":"C\u00e9lia M. 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MA led the team which devised the mental health outcome measure, PSYCHLOPS. However, he has no financial interest in this outcome measure which is available free of charge to all visitors to the website.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of Interest"}},{"value":"All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and\/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethical Approval"}}]}}