Table 3.

Outcomes by setting (after matching).

Outcomes	Mean school-based (n = 492)	Mean community-based matchedc (n = 492)	F	Sig.	Matched between group change effect size da
Days of substance use (Intake)	21.55	24.02	1.99	0.158	−0.09
Days of substance use (6-month)	15.88	15.26	0.14	0.709	0.02
Change in days of substance use	−5.68	−8.76	2.58	0.108	0.10
Within group effect size db	−0.21	−0.32
Days of emotional problems (Intake)	31.67	29.42	1.11	0.292	0.07
Days of emotional problems (6-month)	21.95	19.10	2.08	0.149	0.09
Change in days of emotional problems	−9.89	−10.25	0.03	0.870	0.01
Within group effect size db	−0.29	−0.31
Days of work/school trouble (Intake)	14.57	14.55	0.00	0.987	0.00
Days of work/school trouble (6-month)	9.03	8.08	1.07	0.302	0.07
Change in days of work/school trouble	−5.53	−6.47	0.50	0.479	0.05
Within group effect size db	−0.35	−0.37
Days of family trouble (Intake)	19.74	17.40	1.79	0.181	0.09
Days of family trouble (6-month)	11.08	11.37	0.04	0.841	−0.01
Change in days of family trouble	−8.97	−6.04	2.39	0.122	−0.11
Within group effect size db	−0.31	−0.23
Days of illegal activity (Intake)	3.07	3.61	0.51	0.477	−0.04
Days of illegal activity (6-month)	2.57	4.71	5.33	0.021	−0.13
Change in days of illegal activity	−0.49	1.09	2.41	0.121	−0.10
Within group effect size db	−0.04	0.08
Days in controlled environment (Intake)	3.90	4.25	0.22	0.639	−0.03
Days in controlled environment (6-month)	3.17	4.22	1.51	0.220	−0.07
Change in days of controlled environment	−0.75	−0.02	0.52	0.473	−0.04
Within group effect size db	−0.06	0.00

^aCohen’s d calculated as mean change in use over time in the SB setting minus mean change in use over time in the CB setting divided by the change in CB standard deviation.

^bCohen’s d calculated as mean at follow-up minus mean at baseline divided by the group standard deviation at baseline.

^cDue to weighting, the means for the baseline dependent variables differ from Table 1 for the CB group only.