Editor-In-Chief: C. Michael Gibson, M.S., M.D. 
The CAGE questionnaire, among other methods, has been extensively validated for use in identifying alcoholism. CAGE is considered a validated screening technique, with one study determining that it CAGE test scores >=2 had a sensitivity of 93% and a specificity of 76% for the identification of problem drinkers. . It is not valid for diagnosis of other substance use disorders, although somewhat modified versions of the CAGE are frequently implemented for such a purpose.
The CAGE questionnaire, named for its four questions, is a method to screen for Alcoholism.
Two "yes" responses indicate that the respondent should be investigated further.
The questionnaire asks the following questions:
- ↑ Kitchens JM (1994). "Does this patient have an alcohol problem?". JAMA. 272 (22): 1782–7. PMID 7966928.
- ↑ Bernadt, MW (1982). "Comparison of questionnaire and laboratory tests in the detection of excessive drinking and alcoholism". Lancet. 6 (8267): 325–8. PMID 6120322.
- ↑ Ewing, John A. “Detecting Alcoholism: The CAGE Questionnaire” JAMA 252: 1905-1907, 1984
- ↑ CAGE Questionnaire (PDF)