Frequent Binge drinking during 18-25 years is a risk factor of alcohol addiction in adulthood (25-40 years) Hypothesis: 25% of frequent binge drinking, OR = 2, power 80%, alpha risk : 5% 126 Cases aged 25 to 40 years: alcohol addict patients recruited in Addiction Unit in Rouen University Hospital 126 controls aged 25 to 40 years: non alcohol addict recruited by the Clinical investigation center in Rouen University Hospital An anonymous self-questionnaire was completed Binge Drinking during 18-25 years was retrospectively evaluated Confusion biais was also recorded