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Psychometric Characteristics of the Persian Version of the Opiate Dosage Adequacy Scale (Odas) Publisher



Golnezhad A1 ; Torkamanboutorabi A1, 2 ; Razaghi EM3 ; Zarrindast MR1, 4 ; Yadollahi S5 ; Kataj PD1 ; Vousooghi N1, 2, 4, 6
Authors
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Authors Affiliations
  1. 1. Department of Neuroscience and Addiction Studies, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. Research Center for Cognitive and Behavioral Sciences, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Department of Psychiatry, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. Iranian National Center for Addiction Studies, Tehran University of Medical Sciences, Tehran, Iran
  5. 5. Organization for Educational Research and Planning (OERP), Institute for Educational Studies and Research, Tehran, Iran
  6. 6. Department of Applied Cell Sciences, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran

Source: Basic and Clinical Neuroscience Published:2023


Abstract

Introduction: The opiate dosage adequacy scale (ODAS) is one of the most common assessment tools in studies on substance use disorders, which evaluates the “adequacy” of opiate medication doses in individuals recruited in maintenance approaches. There is no investigation on the Persian version of this questionnaire in Iran. This research validated a Persian version of the ODAS. Methods: The Persian version of the ODAS was translated and revised based on the original scale presented by Gonzalez-Saiz et al. The psychometric characteristics of the ODAS were assessed via direct interviews. Three trained interviewers questioned 250 patients treated in methadone maintenance clinics in Mazandaran Province (Northern Iran) for more than three months. Internal consistency and factor analysis were conducted using SPSS software, version 24. Results: The internal consistency of ODAS was satisfactory (Cronbach’s α=0.81). Across all items, considerable inter-rater reliability was discovered (kappa values between 0.90 and 1). A four-component structure was produced by the factor analysis that accounted for 77.5% of the total variance. Cronbach’s α coefficients of the four components of Heroin craving and overmedication, Consumption, objective opiate withdrawal symptoms, and subjective opiate withdrawal symptoms were 0.84, 0.91, 0.83, and 0.74, respectively. Conclusion: The reliability and validity of the Persian version of the ODAS were satisfactory in a sample of methadone maintenance subjects. © 2023 Iran University of Medical Sciences. All rights reserved.