After omitting the second question of the questionnaire the Cronbach’s alpha increased, but the amount of the increase was rather limited and thus no change in the questionnaire was required. This value was reported to be 0.85 for the cases and 0.84 for the controls. Results: The internal reliability of the questionnaire was estimated to be 0.84 by employing Cronbach’s alpha test, which indicates that approximately 16% of the total variance of the results obtained from the questionnaire was affected by the measurement error. Statistical tests, Cronbach’s alpha, correlation coefficients and exploratory factor analysis were done to analyze the data. Both groups filled out the AUDIT questionnaire. Methods: By employing the method of available sampling, 70 alcoholic patients were included as case group and 70 normal age, gender and education matched individuals were also included as the healthy group (controls). The purpose of the present study is to evaluate the reliability and validity of Alcohol Use Disorders Identification Test (AUDIT). Background: Alcohol consumption is one of the main health problems in most countries.
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