Alcohol consumption was measured us

Alcohol consumption was measured using the Quantity/Frequency Scale (Baer,1993; Marlatt et al., 1995), which is a five-item measure that assesses the number of alcoholic beverages and the number of hours spent drinking on a peak drinking event within the past month. The Quantity/Frequency Scale further assesses the number of days out of the month that the individual consumed alcohol (0 = I do not drink at all, 1 = about once per month, 2 = two to three times a month, 3 = once or twice per week, 4 = three to four times per week, 5 = almost every day, or 6 = I drink once daily or more). Alcohol consumption was also evaluated using the Daily Drinking Questionnaire (Collins et al., 1985; Kivlahan et al., 1990), which measures the number of standard drinks consumed on each day of the week (Monday–Sunday) within the last three months. Scores represent the average number of drinks consumed over the course of each week during the previous month. Relative to other drinking indices ,weekly drinking is a reliable index of problems among undergraduates (Borsari et al.,2001).