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Participants in control and intervention groups
| Autumn 2016 Baseline (grade 7) |
Autumn 2017 Time 1 (grade 8) |
Autumn 2018 Time 2 (grade 9) |
|
|---|---|---|---|
| Control: | |||
| Sample: | 575 | 595 | 648 |
| Included in the analyses: | 534 | 497 | 527 |
| Non-response: | 7.1% | 16.5% | 18.7% |
| Intervention: | |||
| Sample: | 543 | 534 | 571 |
| Included in the analyses: | 519 | 474 | 484 |
| Non-response: | 4.4% | 11.2% | 15.2% |
