title: A polytomous rasch analysis of the english version of health-related quality of life for drug abusers test.
abstract: The specific aim of this study was to analyze the psychometric properties of the English version of the Health-Related Quality of Life for Drug Abusers Test (HRQoLDA Test) applying the Rasch model, and emphasizing fit between empirical data and theoretical Rasch model assumptions; item(s) category probability curve; and precision in terms of information function. In this study, the authors present the results of the translation and adaptation of the original Spanish version to English, as applied to a sample of substance users in Australia. The authors evaluated 121 adults recruited from inpatient and outpatient treatment facilities in Sydney, Australia. The Rating Scale Model was used in the psychometric analysis of the English version of the HRQoLDA Test. The items and persons revealed a fit between the reported data and the model. It was also demonstrated that respondents did not discriminate among the five response categories, which led to a reduction to three response categories. The adaptation of the TECVASP to the English language, renamed the HRQoLDA test, as developed with an Australian sample revealed adequate psychometric properties.
authors.affiliation: Universidad de Huelva (Spain).
authors.forename: Oscar M
authors.initials: OM
authors.lastname: Lozano
authors.affiliation: Universidad de Almería (Spain).
authors.forename: Antonio J
authors.initials: AJ
authors.lastname: Rojas Tejada
authors.affiliation: Nepean Hospital (Australia).
authors.forename: Katia
authors.initials: K
authors.lastname: Foresti
authors.affiliation: University of Western Sydney (Australia).
authors.forename: Carlos
authors.initials: C
authors.lastname: Zubaran
mesh_terms: D000328:Adult; D001315:Australia; D055030:Drug Users; D006801:Humans; D011569:Psychiatric Status Rating Scales / Q000592:standards*; D011594:Psychometrics / Q000295:instrumentation*; D011788:Quality of Life / Q000523:psychology*; D019966:Substance-Related Disorders / Q000523:psychology*
keywords: addictions; psychometrics analysis; quality of life; substance use disorders