Table 1.

Sample description

			Modified Intention to Treat Sample (ITT, n=50)
	Full ITT Sample (n=59)		Modified ITT			Buspirone ( n=23)		Placebo (n=27)
Domain Variable	Mean	SD	Mean	SD	p-value {a}	Mean	SD	Mean	SD	p-value {b}
Demographics
Age	31.4	9.8	31.6	10.2	0.97	29.5	8.4	33.4	11.3	0.32
Sex, N (%) male	52	88%	45	90%	0.29	19	83%	26	96%	0.17
Race, N (%) Caucasian	51	86%	43	86%	1.00	19	83%	24	89%	0.69
Psychiatric Measures
Hamilton Anxiety Rating Scale	9.1	6.6	9.1	6.9	0.67	10.3	7.1	8.1	6.7	0.24
Substance Use Measures
Self Efficacy Score	3.2	1.2	3.3	1.2	0.82	3.2	1.2	3.3	1.2	0.55
Reason for Quiting Score	10.9	6.2	11.0	6.6	0.76	12.1	7.3	10.2	5.8	0.34
Marijuana Problem Score	8.8	4.4	9.0	4.5	0.25	9.1	4.4	9.0	4.7	0.91
Marijuana Craving Questionnaire (MCQ)
MCQ: Compulsion	8.4	4.4	8.3	4.3	0.95	8.3	4.6	8.4	4.1	0.91
MCQ: Emotion	10.5	4.6	10.2	4.6	0.26	9.5	5.5	10.7	3.8	0.49
MCQ: Expectancy	13.0	4.4	12.9	4.4	0.84	12.4	4.0	13.3	4.8	0.46
MCQ: Purposefulness	13.3	5.2	13.2	5.3	0.86	12.5	6.1	13.9	4.5	0.35
MCQ: Total Score	45.1	14.4	44.6	14.4	0.59	42.6	15.9	46.3	13.1	0.40
Withdrawal checklist	18.6	10.4	17.9	9.4	0.70	18.6	7.4	17.4	10.9	0.50
Self-reported use based on 90 day time line follow back
% Days of TLFB with reported use	90%	15%	89%	16%	0.07	87%	20%	91%	11%	0.80
Amount Using Per Using Day	4.0	2.9	3.8	2.5	0.76	3.3	2.1	4.2	2.7	0.28

^{a}For a comparison for differences in the n=9 participants included in the full ITT sample that were not included in the n=50 modified ITT sample.

^{b}For a comparison of differences between treatment groups in the modified ITT sample.