Table 4.
Three-group comparison of model-based means and effect size estimates at post-treatment
| Time Point | Study Group Means (SEs) | Hedges’ g Effect Size Estimates (95% CI) | |||||
|---|---|---|---|---|---|---|---|
| WL | ICBT | GCBT | WL vs. ICBT | WL vs. GCBT | ICBT vs. GCBT | ||
| Child MASC | Baseline | 57.97 (1.47) | 57.3 (11.47) | 57.63 (1.48) | NA | NA | NA |
| 12-Week | 51.95 (1.60) | 48.61 (1.48) | 48.80 (1.65) | 0.28 (0.10, 0.65) | 0.26 (0.12, 0.64) | 0.01 (−0.36, 0.39) | |
| Parent MASC | Baseline | 55.46 (2.10) | 55.04 (2.06) | 59.82 (2.10) | NA | NA | NA |
| 12-Week | 50.86 (2.45) | 47.25 (2.58) | 49.72 (2.46) | 0.20 (0.18, 0.61) | 0.06 (−0.34, 0.48) | 0.14 (−0.27, 0.56) | |
| CGAS | Baseline | 51.20 (0.70) | 51.46 (0.70) | 52.44 (0.71) | NA | NA | NA |
| 12-Week | 53.05 (1.09) | 62.52 (1.17) | 62.81 (1.10) | 1.01a (0.68, 1.35) | 1.04a (0.72, 1.37) | 0.03 (−0.31, 0.37) | |
p<.001.
Note: SE = standard error; WL = wait list control; ICBT = individual cognitive behavioral therapy; GCBT = group cognitive behavioral therapy; MASC = Multidimensional Anxiety Scale for Children; CGAS = Child Global Assessment Scale.
Means presented are model based mean estimated at each time point. The following covariates were included (grand mean centered) in each model: Child age (at baseline), gender, number of comorbid disorders, baseline ADIS CSR ratings for each target anxiety disorder.
For effect size estimates, calculations were based on between-groups differences in estimated mean scores at Week 12 divided by the pooled standard deviation of the outcome at Week 12, otherwise known as Hedges’ g (95% CI).