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Table 4 Intervention effects in subgroups on continuous outcomes regarding fruit, snack, and breakfast intakes, comparing the experimental group (n = 1117) with the control group (n = 758)

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

  Intervention effects among first and second year students Intervention effects among students with more and less favourable baseline dietary intakes Intervention effects among lower and higher educational subtracks
  First-year Second-year First-year Second-year Low baseline intakes High baseline intakes Low baseline intakes High baseline intakes Lower educational subtrack Higher educational subtracks
  Short-term effects B (CI) 1 Longer-term effects B (CI) 1 Short-term effects B (CI) 1 Longer-term effects B (CI) 1 Short-term effects B (CI) 1
Fruit           
Fruit juice frequency - - - - - 0.034** - - - -
(glasses a day)       (0.009-0.059)     
Breakfast 2           
Total energy 0.056* - 0.053* - - - - - - 0.044*
(kcal)1 (0.013-0.098)   (0.012-0.094)        (0.008-0.080)
Total fat - - 0.072* - - - - - - -
(grams)    (0.008-0.137)        
Total saturated fat - - 0.064* - - - - - - -
(grams)    (0.003-0.126)        
Total carbohydrates - - - - - - - - - 0.046*
(grams)           (0.007-0.086)
Total fiber 0.085*** - - - - - 0.043* - - -
(grams) (0.041-0.129)       (0.006-0.081)    
  Short-term OR Longer-term OR Short-term OR Longer-term OR Short-term OR
  First-year Second-year First-year Second-year Unfavourable baseline intakes Favourable baseline intakes Unfavourable baseline intakes Favourable baseline intakes Lower educational subtrack Higher educational subtracks
Snacks           
Ice-cream - - - - 10.00*** 0.12*** - - 0.59* -
      (6.92-14.5) (0.08-0.18)    (0.38-0.91)  
  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.
  2. 2Breakfast nutrients were calculated for students who had consumed breakfast.
  3. * P < 0.05; **P < 0.01; ***P < 0.001.