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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)