The two datasets also differ regarding the operationalization of lifetime abstention. In NLAES, lifetime alcohol abstainers were defined as individuals that had consumed less than 12 drinks in any given year during their lifetime. In NESARC, only individuals that consumed no alcoholic beverages during their lifetime were considered to be lifetime alcohol abstainers. Significantly, only individuals that were considered to be non-abstainers were asked abuse and dependence questions. As noted in the NIAAA (2006) report, “The NESARC and NLAES cover similar issues in two time periods separated by 10 years. However, due to changes in the sampling universe and the definition of current drinkers, readers are cautioned against making simple, direct comparisons between data presented in the two manuals” (p. 1; see also Grucza, Bucholz et al., 2008).
