Table 5 Sociodemographic characteristics of respondents in the adolescent school survey; based on multiply imputed dataset
|  | Control (n = 596) | Intervention (n = 618) |
|---|---|---|
(95% CI) | (95% CI) | |
School year % |  |  |
 Year 7 (11–12 years) | 26.5 (22.0, 31.1) | 27.5 (23.0, 32.0) |
 Year 8 (12–13 years) | 24.8 (21.4, 28.2) | 24.6 (19.9, 29.3) |
 Year 9 (13–14 years) | 19.1 (14.8, 23.5) | 22.0 (16.5, 27.5) |
 Year 10 (14–15 years) | 18.5 (15.4, 21.5) | 16.8 (12.1, 21.5) |
 Year 11 (15–16 years) | 11.1 (6.3, 15.9) | 9.1 (4.3, 13.9) |
Gender % Female | 52.1 (47.2, 57.0) | 49.2 (43.1, 55.3) |
Ethnicity % |  |  |
 White British | 22.5 (10.8, 34.2) | 22.4 (10.1, 34.7) |
 White other | 4.1 (1.5, 6.7) | 8.0 (3.6, 12.4) |
 Black Caribbean/other | 8.6 (4.3, 12.9) | 9.0 (4.9, 13.1) |
 Black African | 19.7 (12.8, 26.5) | 20.9 (12.5, 29.4) |
 Indian/Pakistani/Bangladeshi | 23.7 (4.4, 43.0) | 15.0 (6.5, 23.6) |
 Other Asian | 3.9 (1.6, 6.1) | 5.7 (1.7, 9.6) |
 Mixed | 7.7 (4.7, 10.6) | 10.5 (8.0, 13.1) |
 Other | 9.8 (5.7, 14.0) | 8.4 (5.4, 11.5) |
Lived in UK all their life % | 74.7 (65.6, 83.8) | 71.5 (63.1, 80.0) |
Family Affluence Scale Items % |  |  |
 Family owns a vehicle | 67.1 (62.0, 72.2) | 68.2 (62.1, 74.3) |
 Own bedroom at home | 49.6 (43.4, 55.7) | 55.7 (48.9, 62.5) |
 Family owns a computer | 86.9 (83.1, 90.7) | 89.2 (85.8, 92.6) |
 Family holidays this year |  |  |
  0 | 33.1 (28.5, 37.8) | 30.4 (25.3, 35.5) |
  1 | 39.3 (35.4, 43.1) | 34.9 (30.0, 40.0) |
  2 | 13.6 (9.6, 17.5) | 16.7 (13.4, 20.0) |
  >2 | 14.0 (10.4, 17.5) | 18.0 (14.9, 21.1) |