Treatment effect sizes for anxiety, depression and psychological distress restricted to clients who completed the CBT treatment (n=360)
| n | Mean score | SD (post-treatment) | Effect size (Cohen's d)* | ||
|---|---|---|---|---|---|
| Pretreatment | Post-treatment | ||||
| Anxiety (HADS-A) | |||||
| All | 360 | 11.99 | 7.22 | 4.05 | 1.18 |
| Cases | 300 | 13.31 | 7.82 | 4.01 | 1.36 |
| Depression (HADS-D) | |||||
| All | 360 | 7.30 | 3.17 | 3.47 | 1.19 |
| Cases | 168 | 10.83 | 4.66 | 4.18 | 1.48 |
| Psychological distress (GHQ-12) | |||||
| All | 360 | 6.47 | 2.45 | 3.17 | 1.27 |
| Cases | 28 | 4.25 | 1.64 | 2.31 | 1.13 |
*All p<0.001.
CBT, cognitive-behavioural therapy; GHQ-12, General Health Questionnaire-12; HADS-A/D, Hospital Anxiety and Depression Scale Anxiety/Depression.