|  | Univariable | Adjusted | ||
---|---|---|---|---|---|
 | % | RR (95% CI) | p value | aRR (95% CI) | p value |
Study allocation | Â | Â | Â | Â | Â |
  Control | 37.8 | ref |  | ref |  |
  Intervention | 85.2 | 2.26 (1.71, 2.98) | <0.001 | 2.21 (1.69, 2.90) | <0.001 |
Area | Â | Â | Â | Â | Â |
  Bristol | 42.9 | ref |  | ref |  |
  Bath and North East Somerset | 94.4 | 2.20 (1.41, 3.43) | <0.001 | 2.22 (1.39, 3.56) | 0.001 |
  North Somerset | 63.6 | 1.48 (0.90, 2.45) | 0.122 | 1.41 (0.89, 2.27) | 0.143 |
  South Gloucestershire | 53.9 | 1.26 (0.72, 2.20) | 0.423 | 1.06 (0.65, 1.74) | 0.807 |
  Swindon | 60.0 | 1.40 (0.80, 2.45) | 0.238 | 1.56 (0.89, 2.70) | 0.118 |
  Wiltshire | 62.3 | 1.45 (0.90, 2.34) | 0.125 | 1.46 (0.90, 2.35) | 0.126 |
Involved in substudy | Â | Â | Â | Â | Â |
  No | 60.4 | ref |  | ref |  |
  Yes | 66.7 | 1.10 (0.81, 1.51) | 0.534 | 1.43 (1.04, 1.98) | 0.030 |
Number of pupils | Â | Â | Â | Â | Â |
  194 or less | 60.2 | ref |  | ref |  |
  >194 | 62.4 | 1.04 (0.82, 1.31) | 0.770 | 1.01 (0.83, 1.24) | 0.903 |
Proportion eligible for free school meals | Â | Â | Â | Â | Â |
  6.4% or less | 65.2 | ref |  | ref |  |
  >6.4% | 57.3 | 0.88 (0.69, 1.11) | 0.285 | 0.88 (0.71, 1.08) | 0.219 |