What this scale measures.
The AUDIT measures hazardous and harmful alcohol use over the past year across three domains: consumption (items 1-3), dependence symptoms (items 4-6), and alcohol-related harm (items 7-10). Each of the first eight items is scored 0-4 and the last two 0/2/4, giving a total of 0-40.
It is designed to detect problem drinking along the full spectrum - from hazardous consumption well before dependence, through harmful use, to probable dependence - which distinguishes it from lifetime screens like the CAGE that mainly detect established dependence.