Table 3. Estimated marginal means and linear mixed models for all outcome measures (study 2).
| Pre-treatment Mean (s.d.) n=330 |
Post-treatment Mean (s.d.) n=185 |
Mean difference | (df) | F | r | Effect sizea Hedges g (95% CI) |
Effect sizeb Hedges g (95% CI) |
|
|---|---|---|---|---|---|---|---|---|
| PDSS-SR | 9.83 (5.81) | 6.29 (5.85) | 3.54 | (1, 251.34) | 61.51* | 0.55 | 1.00 (0.81−1.19) | 0.55 (0.36−0.73) |
| K-10 | 24.59 (9.26) | 17.62 (7.89) | 6.97 | (1, 258.36) | 258.36* | 0.69 | 0.92 (0.73−1.11) | 0.93 (0.74−1.12) |
| WHODAS-II | 23.98 (10.54) | 20.93 (9.39) | 3.05 | (1, 207.40) | 28.25* | 0.72 | 0.45 (0.27−0.63) | 0.29 (0.11−0.47) |
| PHQ-9c | 8.91 (7.92) | 5.19 (7.06) | 3.72 | (1, 169.74) | 29.23* | 0.73 | 0.53 (0.33−0.73) | 0.32 (0.12−0.51) |
PHQ9, Patient Health Questionnaire – 9 item; PDSS-SR, The Panic Disorder Severity Scale Self-Report Version; K-10, Kessler Distress Scale – 10 Item; WHODAS, World Health Organization Disability Assessment Schedule-II; r, Pearson correlation between lesson 1 and lesson 6 scores for calculation of within-group effect sizes.
a
Effect size calculated from model with measurement occasion as the only predictor.
b
Effect size calculated according to covariate adjusted models.
c
n=251 had PHQ-9 scores at baseline, and n=159 had PHQ-9 scores at post-treatment.
*P<0.001.