Table 3.

Pre-to-Post Changes During the 6-Month Active Phase Treatment: Comparison between Types of Treatment within Patient Subgroups.

Subgroup / Outcome Variable / Change Criterion	Type of Treatment				Test

	1. IDC	2. CT	3. SE	4. GDC
Common and Fast Responders
n (%)	50 (30%)	41 (24%)	34 (20%)	44 (26%)
ASI–Drug Use Composite Score
d	2.34	1.86	1.89	1.80	n.s.^a
No. Reliably Improved (%)	39 (78%)	25 (61%)	22 (65%)	31 (71%)	n.s.^b
Number of Days Using Cocaine During the Last 30 Days
Reduction in the Number of Days	9.08 (7.93)^***	8.00 (7.83)^***	8.97 (7.62)^***	8.91 (7.65)^***	n.s.^a

Moderate Responders
n (%)	23 (21%)	34 (30%)	30 (27%)	24 (22%)
ASI–Drug Use Composite Score
d	1.42	1.30	1.33	0.69	n.s.^a
No. Reliably Improved (%)	13 (57%)	14 (41%)	13 (43%)	6 (25%)	n.s.^b
Number of Days Using Cocaine During the Last 30 Days
Reduction in the Number of Days	8.30 (8.63)^***	6.15 (7.24)^***	5.97 (6.59)^***	3.88 (5.75)^***	n.s.^a

Severe Users
n (%)	8 (19%)	10 (24%)	12 (29%)	12 (28%)
ASI–Drug Use Composite Score
d	0.69	1.19	0.63	1.33	n.s.^a
No. Reliably Improved (%)	2 (25%)	5 (50%)	4 (33%)	7 (58%)	n.s.^b
Number of Days Using Cocaine During the Last 30 Days
Reduction in the Number of Days	3.38 (10.18)	9.70 (8.84) ^***	1.83 (7.60)	10.92 (9.39) ^***	n.s.^a

Note: IDC = individual drug counseling, CT = cognitive therapy, SE = supportive-expressive therapy, GDC = group drug counseling, ASI = Addiction Severity Index, d = effect size (Cohen's d).

Analysis of variance with post-hoc comparisons.

χ²-Test.

t-test to compare pre-to-post active phase treatment change depending on type of treatment within patient subgroups.

^***

p < .001.