Table 2.

Results from fitting a sequence of discontinuous change trajectories to CAMS clinician CGI-S data (n=488)

			n parameters for…
Model	Fixed effects	Variance components (in addition to ${\sigma }_{\epsilon }^2$)	Fixed effects	Variance components	Deviance	Comparison model: ΔDeviance(df)
A	Intercept, DAYS, SITE, TX, TX × DAYS	Intercept, DAYS	13	4	8968.7	—
B	Model A + RLX	Intercept, DAYS, RLX	14	7	8964.0	A: 4.7 (ns) (4)
C	Model B	Intercept, DAYS, w/o RLX	14	4	8967.2	B: 3.2 (ns) (3)
D	Model A + COG	Intercept, DAYS, COG	14	7	8835.2	A: 133.5** (4)
E	Model D	Intercept, DAYS, w/o COG	14	4	8857.8	D: 22.6** (3)
F	Model D + EXP	Intercept, DAYS, COG, EXP	15	11	8717.1	D: 118.1** (5)
G	Model F	Intercept, DAYS, COG, w/o EXP	15	7	8794.5	F: 77.4** (4)

^**= p<.001;

CGI-S = clinical global impression – severity scale; SITE = vector of dummy coded site variables with site 6 serving as referent; TX = vector of dummy coded treatment conditions with COMB serving as referent; DAYS = days since baseline; RLX = onset of relaxation component of CBT; COG = onset of cognitive restructuring component of CBT; EXP = onset of exposure exercises component of CBT; CBT = cognitive behavior therapy.