Prior analysis of ER data reported here across 16 countries found an average of 75% of those who reported drinking in the six hours prior to injury had a positive BAC at ER admission, (ranging from 88% to 44%) (Cherpitel et al., 2007). A substantial proportion of those denying drinking while registering positive for BAC was accounted for by reporting drinking following the injury (38%). Although this same 16-country study found a positive association between BAC and the likelihood of reporting drinking, none of these ER studies have examined the validity of self-reports based on BAC in relation to the number of drinks consumed.
