. Author manuscript; available in PMC: 2013 Oct 1.

Published in final edited form as: J Subst Abuse Treat. 2012 Feb 14;43(3):313–321. doi: 10.1016/j.jsat.2012.01.003

Table 1.

Change in Behavioral Skills, Drug Use, and Injection Risk Behaviors (6-Months – Baseline) by Group Assignment

Outcome	GROUP		t (p = )	Cohen’s d
	Skin (n = 21)	Assessment-Only (n = 20)
	Gain score M (SD)	Gain score M (SD)
Skin cleaning behavioral skills	18.38 (27.59)	−2.75 (10.43)	3.21 (.003)	1.00
Needle cleaning behavioral skills	15.38 (29.24)	2.75 (16.07)	1.70 (.10)	.53
Bacterial infection risk	−12.66 (13.48)	−8.75 (10.86)	1.02 (.31)	.32
HIV risk	−.10 (5.48)	−.15 (3.67)	0.04 (.97)	.01
Drug use days (last month)	−6.38 (10.36)	−3.25 (11.39)	0.92 (.36)	.29
Injection drug use days (last month)	−7.90 (11.47)	−6.50 (12.37)	0.38 (.71)	.12
Number of times muscled (last month)	−17.19 (32.06)	−7.1 (37.06)	0.94 (.36)	.29