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Table 2 Results of the mixed linear analyses of continuous outcomes of fruit, snacks, and breakfast consumption

From: Healthier food choices as a result of the revised healthy diet programme Krachtvoer for students of prevocational schools

  Experimental condition Control condition B short-term effect 1 B longer-term effect 1
  Uncorrected mean (SD) Uncorrected mean (SD)   
  T0 T1 T2 T0 T1 T2   
  (n = 1117) (n = 1028) (n = 1016) (n = 758) (n = 681) (n = 682)   
Fruit         
Fruit frequency 0.98 1.13 1.03 1.11 1.11 1.01 0.048*** 0.033***
(servings a day) (0.80) (0.81) (0.81) (0.86) (0.92) (0.85) (0.023-0.053) (0.017-0.048)
Yesterday’s fruit consumption 0.97 1.23 1.18 1.02 1.16 1.08 0.023* 0.026*
(servings) (0.90) (0.94) (0.98) (0.86) (0.99) (0.92) (0.002-0.044) (0.005-0.047)
Fruit juice frequency 1.00 1.09 1.06 1.02 0.98 1.01 0.022* 0.013
(glasses a day) (0.95) (0.96) (0.98) (0.97) (0.94) (0.96) (0.004-0.041) (-0.005-0.032)
Snacks         
Snack consumption frequency 1.90 1.86 1.84 1.86 1.90 1.87 0.001 -0.007
(times a day) (1.57) (1.50) (1.56) (1.51) (1.67) (1.69) (-0.020-0.020) (-0.026-0.013)
Yesterday’s snack consumption 1.97 2.09 1.99 1.99 2.11 2.04 0.014 0.004
(number of snacks) (1.51) (1.59) (1.60) (1.54) (1.74) (1.74) (-0.011-0.039) (-0.021-0.030)
  T0 T1 T2 T0 T1 T2 B short-term effect 1 B longer-term effect 1
  (n = 769) (n = 769) (n = 724) (n = 486) (n = 484) (n = 467)   
Breakfast 2         
Energy 302.9 300.7 302.4 314.3 299.4 298.0 0.023 0.027
(kcal) (163.9) (146.2) (144.4) (169.0) (158.3) (154.7) (-0.005-0.051) (-0.001-0.056)
Fat 9.14 9.30 9.42 9.48 9.29 9.48 0.013 0.013
(grams) (7.44) (7.08) (6.96) (8.01) (7.33) (7.70) (-0.030-0.055) (-0.032-0.058)
Saturated fat 4.35 4.47 4.55 4.61 4.60 4.80 0.005 0.006
(grams) (3.87) (3.90) (3.80) (4.35) (4.19) (4.29) (-0.039-0.046) (-0.037-0.049)
Carbohydrates 40.93 40.14 40.26 42.10 40.02 39.06 0.025 0.039
(grams) (24.41) (19.90) (19.64) (21.82) (21.00) (20.75) (-0.005-0.054) (0.008-0.069)*
Protein 11.72 11.41 11.50 12.06 11.51 11.68 0.006 0.007
(grams) (7.32) (6.75) (6.81) (8.14) (7.43) (7.17) (-0.025-0.037) (-0.025-0.039)
Fiber 2.87 2.85 2.81 3.03 2.77 2.84 0.035 0.041
(grams) (2.53) (2.45) (2.05) (2.11) (2.03) (2.26) (0.005-0.064)* (0.011-0.072)**
  1. 1Reported intervention effects were corrected for a random intercept of measurement, student, and class, and the fixed factors of gender, year, educational track, SEP, and ethnicity * P < 0.05; **P < 0.01; ***P < 0.001.
  2. 2 Breakfast nutrients were calculated for students who had consumed breakfast.