Table 1 Descriptive statistics at baseline and differences between the experimental and control groups regarding sociodemographic, anthropometric and psychosocial variables

Age

14.48

1.91

14.52

1.78

718.50

.86

BMI

30.95

6.10

31.42

5.93

765.50

.74

Percentage of fat mass

40.48

6.42

38.81

6.63

791.00

.93

Quality of life

1.65

.59

1.56

.49

732.00

.51

Perceived benefits of the intervention

4.58

.62

4.47

.62

696.50

.30

Positive perspective of life

2.93

.61

3.20

.64

599.00

.05

Self-efficacy/adherence to treatment

3.31

.69

3.30

.69

1602.50

.87

Health responsibility

2.30

.66

2.40

.55

738.50

.55

n

%

n

%

χ ²

p

Gender

.45

.50

 Male

18

45

21

52.5

 Female

22

55

19

47.5