Frequency of binge drinking (1 item): measured using the question – “Over the last 30 days: How many times (if any) have
you had five or more drinks in a row? A “drink” is a glass of wine (ca 15 cl), a bottle or can of beer (ca 50 cl), a shot glass of spirits (ca 5 cl) or a mixed drink, with answer options ‘none’, ‘1’, ‘2’,‘3–5’, ‘6–9’, or ‘10 or more’ times (adopted from 39) .