Variable | Â | Control | Intervention | ||||
---|---|---|---|---|---|---|---|
 |  | % or mean | Standard deviation | n | % or mean | Standard deviation | n |
Demographics | |||||||
Nationality | UK | 75.37 | – | 961 | 78.16 | – | 1052 |
 | Non-UK | 24.63 | – | 314 | 21.84 | – | 294 |
Ethnicity | White British | 68.67 | – | 835 | 71.65 | – | 930 |
 | White other | 7.40 | – | 90 | 6.32 | – | 82 |
 | Mixed | 3.87 | – | 47 | 3.70 | – | 48 |
 | Asian and Asian British | 5.10 | – | 62 | 5.32 | – | 69 |
 | Black and Black British | 206 | – | 25 | 2.77 | – | 36 |
 | Chinese | 10.20 | – | 124 | 8.24 | – | 107 |
 | Other | 2.71 | – | 33 | 2.00 | – | 26 |
Sex | Female | 54.87 | – | 698 | 55.81 | – | 749 |
 | Male | 45.13 | – | 574 | 44.19 | – | 593 |
Age | Â | 18.89 | 2.68 | 1274 | 18.73 | 2.01 | 1340 |
Fruit and vegetable intake | |||||||
 Portions per day | 4.48 | 2.21 | 1267 | 4.49 | 2.34 | 1344 | |
Physical activity | |||||||
 Metabolic equivalent of task per week | 3665.30 | 3518.61 | 1273 | 3510.02 | 3276.63 | 1343 | |
Alcohol consumption | |||||||
 Total units the in previous 7 days | 6.77 | 9.32 | 1271 | 7.15 | 9.72 | 1344 | |
 Number of days binge drinking in the last 7 days (drinkers only) | 0.52 | 0.80 | 833 | 0.56 | 0.82 | 872 | |
 Biochemical marker of alcohol consumption (fatty acid ethyl esters) | 3.24 | 4.09 | 123 | 2.60 | 3.33 | 90 | |
Smoking | |||||||
 Has smoked | 42.89 | – | 1175 | 44.31 | – | 1248 | |
 Current smoker | 3.49 | – | 1175 | 2.80 | – | 1248 | |
 Cigarettes smoked per week (smokers only) | 49.05 | 38.93 | 41 | 53.60 | 45.95 | 35 | |
 Smoking marker (cotinine) | 0.48 | 0.44 | 123 | 0.44 | 0.41 | 90 | |
 Smoking marker (nicotine) | 3.89 | 10.32 | 123 | 6.52 | 17.83 | 90 | |
Other outcomes | |||||||
 EQ-5D-3 L | |||||||
 Health index score from EQ-5D-3 L (visual analogue scale) | 0.94 | 0.12 | 1249 | 0.94 | 0.12 | 1327 | |
 Health index score from EQ-5D-3 L (time trade off) | 0.95 | 0.11 | 1249 | 0.95 | 0.11 | 1327 | |
 EQ-5D-3 L visual analogue scale | 83.26 | 12.12 | 1256 | 82.01 | 13.77 | 1326 | |
 Recreational drugs | |||||||
 Have taken recreational drugs (single sample count method) | 19.11 | 7.21 | 1275 | 17.84 | 6.79 | 1336 | |
 Have taken recreational drugs (biochemical marker) | 24.39 | – | 123 | 24.44 | – | 123 | |
Body mass index | |||||||
 Self-report | 21.78 | 3.69 | 1206 | 21.95 | 3.88 | 1274 | |
 Objective | 21.67 | 3.55 | 123 | 21.5 | 3.39 | 90 | |
Social cognition variables | |||||||
 Fruit and vegetable intention | 4.78 | 1.59 | 1150 | 4.76 | 1.58 | 1258 | |
 Physical activity intention | 5.72 | 1.38 | 1156 | 5.69 | 1.43 | 1263 | |
 Binge drinking intention | 3.33 | 1.90 | 1156 | 3.32 | 1.92 | 1249 | |
 Smoking intention | 1.51 | 1.29 | 1173 | 1.46 | 1.20 | 1269 |