Table 2.
n parameters for… | ||||||
---|---|---|---|---|---|---|
Model | Fixed effects | Variance components (in addition to ) |
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.