Table 4.

Generalized estimating equations (GEEs) with gamma family distribution and log link with Winsorized costs evaluating examining whether treatment group status (I-CBT vs I-EDU) modifies change over time in costs. The group × time interaction represents change over time in costs for the I-CBT group relative to the I-EDU group.

	Direct medical costs			Direct non-medical costs			Indirect costs			Total costs
Predictors	beta	p	95% CI	beta	p	95% CI	beta	p	95% CI	beta	p	95% CI
Time	0.89	0.58	0.59–1.34	0.91	0.81	0.42–1.95	0.63	0.31	0.26–1.53	0.81	0.32	0.53–1.23
Group	0.87	0.34	0.66–1.16	1.56	0.29	0.69–3.51	1.17	0.70	0.53–2.59	0.94	0.72	0.67–1.31
Group × Time	0.84	0.50	0.51–1.39	0.45	0.09	0.18–1.12	0.36	0.07	0.12–1.07	0.77	0.32	0.46–1.29
Adolescent race	1.12	0.52	0.79–1.58	0.91	0.84	0.37–2.23	0.42	0.03	0.19–0.90	0.96	0.84	0.63–1.45