All CASE sessions were completed safely and all participants self-administered after the priming phase. There was considerable variability in self-administration, as evidenced by the aggregate model-projected aBAC profiles (Figure 1). The mean estimated quantity of ethanol administered was 0.57 g/kg (SD=.20, range = .21 – .96). BrAC exceeded 100mg% in some instances; most deviations fell within the expected error range of the breathalyzer unit (5mg%), although 5 participants recorded a reading above 105mg%. These deviations may be explained by the margin of error inherent to both breathalyzer-estimated and model-projected aBAC assessments at any given time. Of note, the descending slope of −1mg% / min generally allows quick recovery to the intended range. One participant registered an unusually high reading (121mg%). Because immediate follow-up readings suggested an error in the initial reading, this data point was removed and replaced with the participant’s next highest reading for the peak BrAC analysis.
