Table 5.

Comparison of 6-Month Follow-up Outcomes by Cocaine Frequency Level Reductions among High Frequency Users at Baseline

	Means (SD)			Group Comparisons B (SE)
	High Frequency Baseline to High Frequency EOT (High-to-high) n = 261	High Frequency Baseline to Low Frequency EOT (High-to-low) n = 114	High Frequency Baseline to Abstinent EOT (High-to- abstinent) n = 63	High-to-low vs. High-to-high	High-to-abstinent vs. High-to-high	High-to-abstinent vs. High-to-low
ASI Cocaine	.43 (.30)	.30 (.27)	.17 (.22)	−.10 (.03)* d=.45	−.20 (.04)** d=.98	−.15 (.04)** d=.52
ASI Other Drug Use	.05 (.09)	.04 (.08)	.03 (.05)	−.005 (.009) d=.11	−.01 (.008) d=.27	−.01 (.009) d=.14
ASI Alcohol	.05 (.13)	.07 (.14)	.07 (.13)	.004 (.01) d=.14	−.02 (.02) d=.15	−.03 (.02) d=0
ASI Medical	.08 (.21)	.07 (.19)	.10 (.25)	.001 (.02) d=.04	.04 (.02) d=.08	.04 (.03) d=.13
ASI Psychological	.16 (.21)	.12 (.16)	.11 (.18)	−.03 (.01)** d=.21	−.04 (.01)* d=.25	−.01 (.01) d=.05
ASI Family	.10 (.17)	.08 (.12)	.09 (.15)	−.01 (.01) d=.13	−.01 (.01) d=.06	.01 (.01) d=.07
ASI Employment	.67 (.27)	.57 (.27)	.59 (.28)	−.06 (.03) d=.37	−.09 (.02)** d=.29	.03 (.02) d=.07
ASI Legal	.08 (.16)	.03 (.10)	.04 (.12)	−.05 (.007)** d=.37	−.03 (.02) d=.28	.02 (.01) d=.09
Cocaine Use Days	8.25 (9.20)	4.39 (6.8)	1.16 (2.89)	−.3.5 (.755)** d=.47	−.6.07 (.27)** d=1.03	−.5.8 (1.29)** d=.61
Cocaine Negative Urine	63 (28.3%)	43 (46.7%)	41 (83.7%)	.47 (.18) OR = 1.59	1.16 (.08)** OR = 3.18	.76 (.10)* OR = 2.1

Note.

^*p≤0.01.

^**p≤0.001.

B = Unstandardized regression coefficient. SD = standard deviation. SE = standard error. d= Cohen’s d. OR = Odds Ratio. EOT = End of Treatment. ASI = Addiction Severity Index. In all models, we controlled for age, gender, race, and education status. For all models with ASI composites as the outcome, we also controlled for the baseline value of the ASI outcome.