Using the AUDADIS alcohol consumption measures, we created a variable indicating maximum number of drinks in a 24 hour period (Maxdrinks;(Saccone et al., 2000; Shmulewitz et al., 2012). AUDADIS consumption items have good psychometric properties and good to excellent inter-rater reliability (ICC=0.59-0.88 for quantity consumed) (Hasin et al., 1997a; Grant et al., 2003). Weekly at-risk drinking (risk drinking) was defined as ≥5 drinks in a day for males or ≥4 in a day for females at least once a week during period of heaviest drinking, and assessed with questions querying the frequency of drinking specific quantities, as described previously (Keyes et al., 2009). Reliability of AUDADIS lifetime drinking frequency was very good to excellent (ICCs 0.72-0.76), and fair-to-good for ≥5 drinks (ICCs 0.47-0.69) (Hasin et al., 1997b; Grant et al., 2003).
