To calculate the DUDIT score, you need to:
Score questions 1 to 9 on a 4-point scale (0 = never and 4 = four times a week or more often).
Score questions 10 and 11 as 0, 2, or 4 (0 = no, 2 = yes, but not over the past year, and 4 = yes, over the past year).
Sum up all the points!
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