Key baseline characteristics of included participants at each time point
| Baseline | 3 months | 6 months | 12 months | 24 months | 36 months | 48 months | 60 months | |
| N | 2767 | 1690 | 1257 | 1074 | 691 | 466 | 288 | 199 |
| Sex (% female) | 58.2 | 59.6 | 61.7 | 61.6 | 59.2 | 63.1 | 63.5 | 63.3 |
| Baseline age (mean±SD) | 18.8±3.8 | 18.4±3.6 | 18.4±3.6 | 18.4±3.6 | 18.7±3.8 | 18.6±3.8 | 18.5±3.7 | 18.4±3.7 |
| Baseline SOFAS (mean±SD) | 62.1±9.4 | 62.3±9.1 | 62.3±9.0 | 61.7±9.4 | 61.4±9.1 | 61.1±8.8 | 60.9±9.0 | 61.0±8.6 |
SOFAS, Social and Occupational Functioning Assessment Scale.