The CAGE alcohol questionnaire takes just four questions to diagnose alcohol problems:
1. Have you ever felt that you should cut down on your drinking?
2. Have people annoyed you by criticizing your drinking?
3. Have you ever felt bad or guilty about your drinking?
4. Have you ever had a drink first thing in the morning to calm your nerves or get rid of a hangover?
9/10 people answering yes to two or more questions have been found to have an alcohol problem and 9/10 people who answer yes to all four are diagnosed to have alcoholism.
Research has shown the CAGE questionnaire is both reliable and valid as a tool to screen for alcohol problems. ( https://en.wikipedia.org/wiki/CAGE_questionnaire )
The great value of the CAGE questionnaire is that people in front line health positions can use it as a quick and reliable screen to include amongst other health questions and allow earlier identification of problems and hachance to get help sooner.