Table 1

Baseline demographic and dietary data by intervention group for schools and pupils completing the trial

VariableControl (n=539)95% CIIntervention (n=432)95% CI
Region
 England3637
 Wales32
 Scotland20
 Northern Ireland21
School-level variables
*Free school meals (%)144 to 20164 to 21
*Key stage 2 results4.14.0 to 4.34.13.9 to 4.3
Individual-level variables
 Male gender (%)54.949.3
 Sandwich (g)96.690.9 to 102.493.687.4 to 99.8
 Other starchy food (g)4.90.7 to 99.14.6 to 13.7
 Cheese (g)7.35.3 to 9.35.33.1 to 7.5
 Milk-based desserts (g)34.929.6 to 40.240.634.8 to 46.3
 Fruit (g)67.657.6 to 77.572.361.6 to 83
 Vegetables (g)5.63.1 to 8.17.34.6 to 10
 Unsweetened drinks (g)108.388.5 to 128.193.372 to 114.6
 Permitted desserts (g)6.44.9 to 7.96.44.7 to 8.1
 Savoury snacks (g)15.814.2 to 17.416.915.1 to 18.7
 Confectionery (g)23.320.7 to 25.922.119.3 to 24.9
 Sweetened drinks (g)201.6179.6 to 223.6225.0201.3 to 248.7
 Energy (E) (kcal)616.8591.9 to 641.7622.1595.5 to 648.7
 Protein (g)17.716.7 to 18.818.117 to 19.1
 Total fat (g)21.019.7 to 22.320.318.9 to 21.6
 Total fat (% E)29.728.6 to 30.728.827.6 to 29.9
 Saturated fat (g)8.17.6 to 8.77.97.4 to 8.5
 Saturated fat (% E)11.511 to 1211.110.6 to 11.6
 Total carbohydrate (g)94.390.4 to 98.297.293 to 101.3
 Total sugar (g)51.048.1 to 53.954.851.6 to 57.9
 Non-milk extrinsic sugars (g)38.035.5 to 40.641.438.7 to 44.2
 Non-milk extrinsic sugars (% E)22.921.5 to 24.224.923.4 to 26.3
 Fibre (NSP) (g)3.63.4 to 3.73.93.7 to 4.2
Sodium (mg)736.6680.8 to 796.9752.2691.5 to 818.2
Calcium (mg)221.0203.3 to 240.1240.1219.6 to 262.5
Iron (mg)2.22 to 2.32.32.1 to 2.5
Zinc (mg)1.81.7 to 1.92.01.8 to 2.1
Folate (μg)45.141.7 to 48.750.746.6 to 55.1
Vitamin C (mg)29.025.2 to 33.435.330.4 to 41.1
Vitamin A (μg)63.653 to 76.288.172.4 to 107.1
  • * Median and IQR.

  • Nutrient log transformed.

  • NSP, non-starch polysaccharides.