Table 2.
Primary and secondary outcomes
| Control group | Intervention group | Adjusted mean difference or odds ratio (95% CI) | Adjusted effect size (95%CI) | p value | |
|---|---|---|---|---|---|
| Primary outcomes (all adolescent-reported) | |||||
| YTP score at 6 weeks | 4·60 (2·75) | 3·52 (2·66) | −1·01 (−1·63 to −0·38) | 0·36 (0·11 to 0·61) | 0·0015 |
| SDQ Total Difficulties score at 6 weeks | 18·33 (5·45) | 17·48 (5·45) | −0·86 (−2·14 to 0·41) | 0·16 (−0·09 to 0·41) | 0·18 |
| Secondary outcomes (all adolescent-reported) | |||||
| YTP score at 12 weeks | 4·19 (2·89) | 3·09 (2·69) | −1·03 (−1·60 to −0·47) | 0·35 (0·18 to 0·54) | 0·0004 |
| SDQ Total Difficulties score at 12 weeks | 17·70 (5·68) | 16·69 (5·62) | −1·12 (−2·33 to 0·10) | 0·20 (0·02 to 0·37) | 0·072 |
| SDQ Impact score at 12 weeks | 1 (0 to 4) | 0 (0 to 3) | −0·86 (−2·62 to 0·90) | 0·23 (0·05 to 0·41) | 0·34 |
| SDQ Internalising symptoms subscale score at 12 weeks | 8·73 (3·53) | 8·21 (3·23) | −0·61 (−1·32 to 0·09) | 0·18 (0·002 to 0·36) | 0·089 |
| SDQ Externalising symptoms subscale score at 12 weeks | 8·97 (3·12) | 8·48 (3·19) | −0·49 (−1·15 to 0·16) | 0·16 (−0·02 to 0·33) | 0·14 |
| PSS-4 score at 12 weeks | 7·17 (2·63) | 6·62 (2·49) | −0·53 (−1·0 to −0·02) | 0·21 (0·03 to 0·38) | 0·040 |
| SWEMWBS score at 12 weeks | 23·27 (5·71) | 24·18 (6·15) | 1·00 (−0·27 to 2·28) | 0·17 (−0·01 to 0·35) | 0·12 |
| Remission at 6 weeks | 50/121 (41%) | 50/123 (41%) | 0·95 (0·56 to 1·64) | .. | 0·87 |
| Remission at 12 weeks | 58/121 (48%) | 65/121 (54%) | 1·31 (0·76 to 2·25) | .. | 0·33 |
Data are mean (SD), median (IQR), or n/N (%), unless otherwise indicated. SDQ=Strengths and Difficulties Questionnaire. YTP=Youth Top Problems measure. PSS-4=Perceived Stress Scale 4-item version. SWEMWBS=Short Warwick-Edinburgh Mental Well-Being Scale.