Psychometric Properties of the CAGE Questionnaire Amongst Middle-Aged and Older Adults in Khuzistan Province of Iran.

The CAGE questionnaire is an instrument, proved useful in helping to make a diagnosis of alcoholism. The questions focus on Cutting down, Annoyance by criticism, Guilty feeling, and Eye-openers. The questionnaire has been more pervasive simple tool than AUDIT and LAST scales to screen in busy medical settings where limited time is considered for adult patient interviews. The present study aimed to determine the reliability and validity of the CAGE questionnaire in Khuzistan province, Iran and evaluate its role in detecting alcohol-related problems. For this purpose, 382 men with mean age of 65 ± 5 were sampled by cluster-random sampling method in convenience model from the medical centers in eight counties of Khuzistan province during 2019 and they responded to the CAGE questionnaire. The coefficients of Cronbach's alpha (α = 0.82), convergent validity (0.73), divergent validity (-0.06), and criterion validity (0.87) were estimated (ρ < 0.01). The exploratory factor analysis demonstrated that the four -items related to the CAGE for the aged samples are organized into one factor, which clarifies 94% of the variance. Based on the results of the second-order confirmatory factor analysis, all factors were matched up well into a principal factor. Finally, the one -factor model was appropriate for the data by using the fit index techniques for adjusting the scale (AGFI = 0.81, TLI = 0.91, GFI = 0.93, RMSEA = 0.006, IFI = 0.94, NFI = 0.91, CFI = 0.97).The results could prove the well-adjusted reliability and validity of the CAGE and its usefulness for the relevant studies.