Indexes of addictive behavior
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Alcohol consumption was assessed with three items derived from the Alcohol Use Dis orders Identification Test (AUDIT-C, Bush, Kivlahan, McDonell, Fihn, & Bradley, 1998). The first question measured consumption frequency during the last year, from 0 (never) to 4 (4 or more times a week). The second question only concerned consumers and assessed the number of standard drinks containing alcohol on a typical day during the last year from 0 (1-2 drinks) to 4 (10 or more). The third question assessed the fre quency during the last year of high consumption on one occasion (i.e. six drinks or more), from 0 (never) to 4 (daily or almost daily). The alcohol consumption score corre sponds to the sum of the three ratings and can vary between 0 and 12.
The consumption of anxiolytic medication was assessed with two questions. The first question concerned the use of anti-anxiety medication with a binary response format 0 (no) or 1 (yes). When the answer was “yes”, a second question measured the frequency of consumption, from 1 (rarely) to 4 (daily). The total score can vary between 0 and 4.
Antidepressant consumption was assessed with the same two questions as for anxiolytic consumption. The total score can also vary between 0 and 4.
Tobacco consumption was assessed with two questions. The first one referred to current tobacco smoking status and was coded by 0 (abstinent), 1 (occasional smoker) and 2 (daily smoker). Smokers were asked a second question concerning the number of tobacco products they smoked in a day and was coded by 1 (less than 10), 2 (between 11 and 20), 3 (between 21 and 30) or 4 (more than 30). The tobacco consumption score corresponds to the product of the two ratings (frequencytquantity). The total score can vary between 0 and 8.