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Table 2 Final Characteristics of study sample, by treatment group

From: Effectiveness of a diet and physical activity promotion strategy on the prevention of obesity in Mexican school children

   Intervention Control  
   n = 498 n = 499 p
Sex (%)     
  Females 52.1 (47.7,56.5) 49.6 (45.2,54.0) 0.43
  Males 47.9 (43.5, 52.3) 50.4 (46.0,54.8)  
Age (y) (%)     
  < 10 0.5 (0.0,1.3) 0.6 (0.0,1.2) 0.82
  10 52.1 (47.7, 56.5) 53.0 (48.6,57.4)  
  11 41.1 (36.8,45.4) 39.0 (34.7,43.3)  
  12 4.6 (2.8,6.4) 4.8 (2.9,6.7)  
  ≥ 13 1.6 (0.5,2.7) 2.6 (1.2,4.0)  
Socioeconomic Index (SEI) (%)     
  Low 34.7 (30.6,38.9) 34.4 (30.2,38.6) 0.12
  Medium 33.9 (29.8,38.1) 39.4 (35.1,43.7)  
  High 31.3 (27.3,35.4) 26.2 (22.3,30.1)  
Overweight     
  Females 21.8 (16.8,26.9) 22.8 (17.5,28.0) 0.32
  Males 16.3 (11.6,21.0) 20.3 (15.3,25.3)  
Obesity (%)     
  Females 8.8(5.4,12.3) 9.8 (6.1,13.5) 0.98
  Males 16.3 (11.6,21.0) 16.3 (11.7,20.9)  
Body Mass Index (BMI) (X)     
  Females 45.3 (31.8,58.9) 43.5 (29.3,57.5) 0.85
  Males 54.3 (38.8,69.8) 60.8 (45.4,76.2) 0.56
Dietary intake (X)     
  Energy (Kcal) 1829.0 (1761.3,1896.6) 1818.7 (1743.4,1894.0) 0.84
  Carbohydrates (g) 337.0 (323.4,350.6) 341.0 (325.7,356.2) 0.71
  Lipids (g) 37.9 (36.3,39.6) 35.9 (34.3,37.5) 0.08
Physical Activity (%)     
  Non active 13.8 (10.8,16.8) 16.3 (13.0,19.5) 0.53
  Moderately active 13.4 (10.4,16.4) 13.5 (10.5,16.5)  
  Active 72.9 (69.0,76.8) 70.3 (66.3,74.3)  
Knowledge (X)     
  Eating 8.2 (8.1,8.4) 7.7 (7.6,7.8) 0.000
  Physical Activity 7.8 (7.7,7.9) 7.6 (7.5,7.7) 0.028
Eating (%)     
  passed > 6 91.0 (88.5,93.5) 86.1 (83.1,89.2) 0.016
  failed < 6 9.0 (6.5,11.5) 13.9 (10.8,16.9)  
Physical Activity     
  passed > 6 92.2 (89.8,94.5) 91.8 (89.3,94.2) 0.81
  failed < 6 7.8 (5.5,10.2) 8.2 (5.8,10.7)  
Self-efficacy (X)     
  Eting 9.0 (8.9,9.1) 8.9 (8.8,9.0) 0.044
  Physical Activity 7.1 (7.0,7.3) 6.9 (6.7,7.0) 0.014
Eating     
  High 98.2 (97.0,99.4) 96.0 (94.3,97.7) 0.038
  Medium 1.8 (0.6,3.0) 4.0 (2.3,5.7)  
  Low - -  
Physical Activity     
  High 53.1 (48.7,57.9) 44.8 (40.4,49.2) 0.028
  Medium 43.7 (39.3,48.0) 52.0 (47.6,56.4)  
  Low 3.2 (1.7,4.8) 3.2 (1.7,4.8)