Skip to main content

Table 1 Baseline 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 = 510 n = 509 p
Sex (%)     
  Females 51.6 (47.2,55.9) 49.7(45.4,54.1) 0.55
  Males 48.4 (44.1,52.8) 50.3 (45.9,54.6)  
Age (y) (%)     
  < 10 7.5 (5.2,9.7) 10.5 (7.8,13.1) 0.49
  10 78.6 (75.1,82.2) 75.3 (71.3,78.8)  
  11 10.4 (7.7,13.0) 10.3 (7.6,12.9)  
  12 2.2 (0.9,3.4) 2.8 (1.3,4.2)  
  ≥ 13 1.4 (0.4,2.4) 1.2 (0.4,2.7)  
Socioeconomic Index (SEI) (%)     
  Low 34.9 (30.8,39.0) 34.1 (30.1, 38.3) 0.12
  Medium 33.7 (29.6, 37.8) 39.3 (35.0, 43.5)  
  High 31.4 (27.3, 35.4) 26.5 (22.7, 30.4)  
Overweight     
  Females 20.2 (15.3,25.0) 23.3 (18.0,28.6) 0.39
  Males 19.0 (14.1, 23.9) 25.9 (20.5,31.3)  
Obesity (%)     
  Females 11.4 (7.6,15.3) 9.6 (6.0, 13.3) 0.78
  Males 17.4 (12.7,22.2) 15.1 (10.7,19.6)  
Body Mass Index (BMI) (X)     
  Females 18.6 (18.1, 19.9) 18.7 (18.3, 19.1) 0.6
  Males 18.8 (18.3,19.2) 18.8 (18.4,19.3) 0.85
Dietary intake (X)     
  Energy (Kcal) 1731.0 (1656.5, 1805.5) 1509.2 (1437.6, 1580.8) 0.0001
  Carbohydrates (g) 339.7 (324.0, 355.4) 299.0 (284.2, 313.8) 0.0002
  Lipids (g) 28.9 (27.5, 30.4) 24.3 (23.0, 25.6) 0.0001
Physical Activity (%)     
  Non active 21.9 (18.3,25.4) 47 (42.7, 51.4) 0.0001
  Moderately active 14.4 (11.3, 17.4) 14.6 (11.5, 17.6)  
  Active 63.8 (59.6, 68.0) 38.4 (34.2,42.6)  
Knowledge (X)     
  Eating 7.5 (7.3, 7.6) 7.3 (7.2, 7.4) 0.04
  Physical Activity 7.2 (7.1, 7.3) 7.2 (7.0, 7.3) 0.4
Eating (%)     
  passed > 6 82.1 (78.8, 85.5) 77.2 (73.6, 80.9) 0.05
  failed < 6 17.9 (14.5, 21.2) 22.8 (19.1,26.4)  
Physical Activity     
  passed > 6 85.7 (82.6, 88.7) 84.3 (81.1, 87.4) 0.5
  failed < 6 14.3 (11.3, 17.4) 15.7 (12.6,18.9)  
Self-efficacy (X)     
  Eating 8.6 (8.5, 8.7) 8.5 (8.4,8.6) 0.2
  Physical Activity 6.8 (6.6, 6.9) 6.7 (6.6,6.9) 0.7
Eating     
  High 94.9 (93.0,96.8) 91.9 (89.6, 94.3) 0.1
  Medium 5.1 (3.2, 7.0) 7.9 (5.5, 10.2)  
  Low - 0.2 (0.0, 0.6)  
Physical Activity     
  High 43.6 (39.3, 47.9) 42.4 (38.1, 46.7) 0.4
  Medium 53.4 (49.1, 57.8) 53.0 (48.7, 57.4)  
  Low 3.0 (1.5, 4.4) 4.5 (2.7, 6.3)