As supplementary analyses, we conducted exploratory factor and IRT analysis on lifetime criteria among lifetime drinkers (N=27,616) (see Supplementary Analysis). Similarly to past 12-month estimates, craving exhibited low prevalence compared to existing DSM-IV criteria (3.5% SE=0.1). Craving was unidimensional with existing criteria, with a one-factor model fitting the seven DSM-IV dependence, four DSM-IV abuse, and craving criteria (CFI=0.995, TLI=0.994, RMSEA=0.031, SRMR=0.041). IRT analysis indicated relatively high severity (craving was the second most severe item after ‘neglect roles’) and discrimination (craving was the third most discriminating item of the twelve). Model fit estimates indicated improved fit with the addition of craving. While the rank order of discrimination and severity estimates are slightly different comparing lifetime to past-12 month criteria, Neglect Roles, Legal Problems, and Activities Given Up, remained the highest severity criteria, while Larger/Longer, Hazardous Use, and Quit/Control remained the low severity criteria.
