Abstract
Objective: The Opiate Dosage Adequacy Scale (ODAS) is one of the most common assessment tools in substance use disorders studies which evaluates the "adequacy" of opiate medication doses in individuals recruited in maintenance approaches. There has been no investigation regarding the Farsi edition of the questionnaire in Iran. The research has validated a Farsi edition of the ODAS tool.
Methods: The Farsi version of the ODAS was translated and revised based on the original scale presented by González-Saiz and colleagues. 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 Version 24.
Results: The ODAS' internal consistency was satisfactory (alpha Cronbach = 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 totally accounts for 77.5% of the total variance: "Heroin craving and overmedication", "Consumption", "Objective opiate withdrawal symptoms (OWS)", and "Subjective OWS". Cronbach's alpha coefficients of the four components were 0.84, 0.91, 0.83, and 0.74, respectively.
Conclusion: The reliability and validity of the Farsi edition of the ODAS were satisfactory in a sample of methadone maintenance subjects.
Methods: The Farsi version of the ODAS was translated and revised based on the original scale presented by González-Saiz and colleagues. 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 Version 24.
Results: The ODAS' internal consistency was satisfactory (alpha Cronbach = 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 totally accounts for 77.5% of the total variance: "Heroin craving and overmedication", "Consumption", "Objective opiate withdrawal symptoms (OWS)", and "Subjective OWS". Cronbach's alpha coefficients of the four components were 0.84, 0.91, 0.83, and 0.74, respectively.
Conclusion: The reliability and validity of the Farsi edition of the ODAS were satisfactory in a sample of methadone maintenance subjects.
| Original language | English |
|---|---|
| Pages (from-to) | 471-478 |
| Journal | Basic and Clinical Neuroscience |
| Volume | 14 |
| Issue number | 4 |
| Early online date | 1 Jul 2023 |
| DOIs | |
| Publication status | Published - 1 Jul 2023 |