. Author manuscript; available in PMC: 2006 Jul 19.

Published in final edited form as: Am J Addict. 2006;15(1):105–110. doi: 10.1080/10550490500419169

TABLE 2.

Secondary outcome variables: Craving, withdrawal (CSSA Scores), and cocaine use data

Change in craving and CSSA totals scores by condition (n = 13)	NAC condition		Placebo condition
	M	SE	M	SE
Sum of craving change scores	-3.50^*	1.57	-2.30	1.36
Change for CSSA total scores^†	-7.38^‡	2.69	-2.62	2.10
Pre- and post-study self-reported average daily dollar value of cocaine used and proportion of days used (n = 13)	Pre-study		Post-study
	M	SE	M	SE
Daily $ use of cocaine^§	$30.31	3.44	$8.77	2.52
Mean proportion days used^∥	.41	.07	.27	.07

One-sample t-test, t₁₂ = -2.24, p < .05.

^†

Change from intake to discharge.

^‡

One-sample t-test, t₁₂ = -2.75, p < .05.

^§

Daily $ use was lower during post-study follow-up, Wilcoxon signed rank, Z = -1.99, p < .05.

^∥

Proportion of days used was lower during post-study follow-up, Wilcoxon signed rank, Z = -3.18, p < .01.