Table 2.

Effects of methadone dose and contingency group

	Means and SD for Six Groups						Statistical Analysis Results
	70 mg groups			100 mg groups			contrasts, 70 mg groups			contrasts, 100 mg groups
	NC	Coc	Split	NC	Coc	Split	NC vs C	C vs S	NC vs S	NC vs C	C vs S	NC vs S
Quantitative benzoylecgonine
Mean BZE ng/mL	55,842	44,183	42,981	66,313	42,397	56,717	p = .02	n.s.	n.s.	p<.003	n.s.	p<.04
SD	47,258	46,550	47,316	45,735	47,264	46,786
Longest duration of simultaneous abstinence
Mean weeks	0.91	1.26	2.00	0.71	2.17	2.71	n.s.	n.s.	n.s.	p<.04	n.s.	p<.02
SD	2.33	1.93	3.36	1.25	3.59	4.21
Self-reported cocaine use
Mean uses/day	0.39	0.20	0.32	0.40	0.25	0.29	p=.003	p=.033	n.s.	p=.012	n.s.	p<.009
SD	0.27	0.27	0.27	0.27	0.28	0.29
Quality of life - SAS-SR
Mean score, family	1.79	1.51	1.39	1.54	1.54	1.34	p=.082	n.s.	p=.014	n.s.	n.s.	n.s.
SD	0.68	0.67	0.69	0.69	0.70	0.71
Mean score, financial	2.39	1.99	2.18	2.22	1.89	1.09	p=.09	n.s.	n.s.	n.s.	n.s.	n.s.
SD	1.04	1.03	1.02	1.05	1.09	1.01

NC - noncontingent; C - cocaine contingency; S - split contingency; BZE - benzoylecgonine; n.s. - not significant, p > .10.