Table 2.

Participation, retention and earnings for each treatment condition.

Participation, Retention, and Earnings Outcomes	EXP (n = 37)	CONTROL (n = 38)	X2 or t	p-value
	N/(%) or M (SD)	N/(%) or M (SD)
% attending during week 14	32 (86.5%)	34 (89.5%)	.16	.69
Mean sessions attended	12.4 (2.9)	12.6 (2.3)	.29	.78
% follow up participation
12 weeks after treatment end	31 (83.8%)	31 (81.6%)	.06	.80
24 weeks after treatment end	28 (75.7%)	27 (71.0%)	.21	.65
36 weeks after treatment end	30 (81.1%)	30 (78.9%)	.05	.82
Mean maintenance urine tests attended of 12	5.2 (4.6)	5.3 (4.2)	.13	.90
Mean teen incentive earnings	$337.32 (231.98)	$136.58 (66.54)
Mean parent incentive earnings (one-parent family)	$184.44 (62.79)	N/A
Mean parent incentive earnings (two-parent family)	$250.54 (114.50)	N/A
Mean sessions ≥1 parent attended of 14	12.4 (3.0)	N/A
Mean number of weeks (of 11 possible) parent(s) enforced consequences	8.5 (3.0)	N/A
Mean number of weeks (of 14) parent(s) used ≥1 alcohol saliva test	9.9 (3.3)	N/A
Mean total number alcohol saliva tests used per family	44.9 (25.3)	N/A
Mean maintenance parent sessions attended of 6	.9 (1.3)	N/A

Note: EXP=Experimental Condition; CONTROL=Control Condition