| Baseline | T2 | T3 | |||||||
| Mean | SD | n | Mean | SD | n | Mean | SD | n | |
| Advancing adolescence | 50.23 | 6.82 | 286 | 50.11 | 6.28 | 187 | 51.07 | 6.14 | 159 |
| Waiting list | 50.37 | 6.62 | 307 | 50.74 | 5.66 | 200 | 51.14 | 6.69 | 140 |
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