Two "yes" responses indicate that the possibility of alcoholism should be investigated further. The questionnaire asks the following questions:
Have you ever felt you needed to Cut down on your drinking?
Have people Annoyed you by criticizing your drinking?
Have you ever felt Guilty about drinking?
Have you ever felt you needed a drink first thing in the morning
(Eye-opener) to steady your nerves or to get rid of a hangover?
Citation: Ewing, John A. "Detecting Alcoholism: The CAGE Questionnaire"
JAMA 252: 1905-1907, 1984 PMID 6471323