Table 2. Baseline characteristics of the economic sample (N = 997) and whole sample (N = 1,752), separated by randomisation arm†.
| Characteristic | Economic Sample (N = 997) | Whole Sample (N = 1,752) | ||
|---|---|---|---|---|
| Intervention arm | Control arm | Intervention arm | Control arm | |
| Participants (n) | 570 | 427 | 867 | 885 |
| Ethnic Group | n (%) | n (%) | n (%) | n (%) |
| White | 467 (82) | 319 (75) | 673 (77) | 669 (76) |
| Non-white | 103 (18) | 108 (25) | 194 (23) | 216 (24) |
| Year Group | ||||
| Year 7 | 206 (36) | 194 (46) | 318 (37) | 356 (40) |
| Year 8 | 232 (41) | 176 (41) | 365 (42) | 355 (40) |
| Year 9 | 132 (23) | 57 (13) | 184 (21) | 174 (20) |
| Mean (SD), range | Mean (SD), range | Mean (SD), range | Mean (SD), range | |
| Age at baseline (years) | 12.9 (0.8), 12–14 | 12.7 (0.8), 11–14 | 12.8 (0.8), 11–14 | 12.8 (0.8), 11–14 |
| Pupils who classified their ethnicity as non-white per school (%) | 22.5 (27.5), 1–88 | 29.6 (35.7), 5–96 | 21.6 (26.7), 1–88 | 24.9 (32.1), 5–96 |
| Pupils eligible for free school meals per school (%) | 12.7 (5.2), 7–27 | 10.2 (6.4), 4–21 | 13.3 (5.3), 7–27 | 9.6 (5.9), 4–21 |
| School Index of Multiple Deprivation (IMD) (decile score)± | 6.2 (2.4), 1–9 | 7.2 (2.4), 4–10 | 6.1 (2.4), 1–9 | 7.2 (2.2), 4–10 |
| Pupil IMD (decile score)± | 5.2 (2.7), 1–10 | 6.3 (3.0), 1–10 | 5.1 (2.7), 1–10 | 6.5 (2.8), 1–10 |
† number of observations reduces to intervention (n = 532) and control (n = 407) for the economic analyses.
± higher the number the least deprived.