Table 1.

Comparison of Responder Groups during the Early Phase of IV-ASA

Criteria for each group	Nonresponders (n=12)	Low Responders (n=50)	High Responders (n=43)
Rewards earned in the first 30 minutes	0	1–6	7–12
Self-administration measures within the first 30 minutes of open-bar phase
Rewards earned	0.0 ± 0.0	3.2 ± 1.3	8.7 ± 1.9
Peak BrAC (mg%)	11.6 ± 2.4	23.2 ± 8.4	65.5 ± 19.4
Average BrAC (mg%)	6.1 ± 1.3	15.8 ± 6.6	40.8 ± 9.6
Demographic and drinking history measures
AUDIT**	4.2 ± 2.8	5.3 ± 2.3	6.7 ± 2.8
AUDIT-C*	3.9 ± 2.2	4.8 ± 1.7	5.4 ± 1.7
Total drinks in past 90 days*,a	62.4 ± 67.4	69.0 ± 46.9	98.2 ± 95.2
Drinking days in past 90 days	22.4 ± 20.5	25.0 ± 10.9	26.2 ± 16.8
Drinks per drinking day in past 90 days*	2.6 ± 1.6	2.8 ± 1.4	3.6 ± 1.6
Heavy drinking days in past 90 days**,a	4.0 ± 6.3	5.3 ± 7.3	8.3 ± 13.1

Abbreviations: AUDIT, Alcohol Use Disorder Identification Test; AUDIT-C, AUDIT Consumption sub-score; BrAC, breath alcohol concentration.

All data are reported as mean and SD. *P<.05 for difference between high responders and non- and low responders. **P<.01 for difference between high responders and non- and low responders.

^a Analyzed using nonparametric Kruskal-Wallis test.