the study in general population points out that the prevalence of persons suffering from at least one trouble with the MINI declines among the subjects belonging to the highest brackets: 34.4% for the 18-64 years old, 23.2% for the 65-74 years, and 22.9% for the elderly, 75 years old and more. Anxiety decreases with the ageing (23.4% among the less than 65 years old, instead of 12.7% for the 75 years and more) as well as the addictive behaviours and the psychotic disorders (3.1% for the less than 65 years old, instead of 1.1% for the 75 years old and more).