Given that our sample was predominantly Caucasian (see Table 2), the haplotype analysis was limited to the 52 individuals who self-reported their race as Caucasian and were also determined to be so based on their genetic ancestry proportion. The linear mixed effects model included a contrast for haplotype differences as a major predictor, while controlling for time, BAC, as well as demographic characteristics including age, gender and drinking behavior variables that were significant for the outcome of interest.
