. Author manuscript; available in PMC: 2017 Sep 1.

Published in final edited form as: J Subst Abuse Treat. 2016 May 8;68:11–23. doi: 10.1016/j.jsat.2016.04.005

Table 5.

Client program retention and primary substance use outcomes by supervision condition and site.

	Supervision Condition
Variable	MIA: STEP	SAU	Supervision Condition	Site
4-week outcomes
Percent sessions attended
M	60.82	59.27	F(1, 374) = .21 p = .65	F(1, 391) = 1.30 p = .20
SD	32.36	32.55	partial eta² = .004	partial eta² = .05
Percent retained in treatment	73.0%	70.7%	Wald(1) = .29 p = .59	Wald (1) = .19 p = .66
Days of primary substance abstinence
M	21.96	22.23	F(1, 370) = .01 p = .94	F(15, 370) = 2.56 p=.001
SD	8.28	8.33	partial eta² = .000	partial eta² = .09
12-week outcomes
Percent sessions attended
M	60.83	57.85	F(1, 284) =.82 p = .37	F(15,284) = 1.13 p = .33
SD	41.48	29.01	partial eta² = .01	partial eta² = .06
Percent retained in treatment	51.5. %	52.9%	Wald(1) = .14 p = .71	Wald(1) = 4.71 p = .03
Days of primary substanc e abstinence
M	22.35	22.80	F(1, 353) = 0.01 p = .94	F(15, 353) = 3.26 p = .00
SD	8.34	7.82	partial eta² = .00	partial eta² = .12

Note. MIA: STEP = Motivational Interviewing Assessment: Supervisory Tools for Enhancing Proficiency, SAU = Supervision-as-Usual. A family-wise alpha of p <.017 (.05/3) marked significant effects.