Table 1 shows the categorized volume levels, the actual bin endpoints of the continuous volume scale corresponding to each categorized level, and the BAC values that correspond to the volume bin endpoints derived from the inverted empirical regression relationship. For example, the volume level defined as 1 drink corresponds to the continuous volume range of less than 1.5 drinks, while a volume level of 2 drinks corresponds to the continuous volume range of 1.5 to 2.5 drinks. Higher volume levels were categorized similarly.
