Table 1 Prevalence of obesity according to age and gender

Boys 7 years old (n = 1280)

Girls 7 years old (n = 1251)

p

BMI (kg/m²)

17.9 ± 2.8*

17.8 ± 2.8*

0.463

W (cm)

60.8 ± 8.1*

60.1 ± 8.1*

0.033

Overweight/obese (%)(IOTF)

25.4/14.7**

25.9/14.8

0.952

Overweight or obese (%)(IOTF)

40.1**

40.7

0.791

Overweight/obese (%)(WHO)

24.4/25.8*

26.5/19.7

0.001

Overweight or obese (%)(WHO)

50.2*

46.2***

0.047

Abdominal obesity (%)

25.2*

25.3

0.952

Boys 9 years old

(n = 1276)

Girls 9 years old

(n = 1424)

p

BMI (kg/m²)

19.6 ± 3.5*

19.3 ± 3.6*

0.028

W (cm)

67.1 ± 10.7*

65.3 ± 10.1*

<0.001

Overweight/obese (%)(IOTF)

31.0/14.9**

28.0/14.7

0.192

Overweight or obese (%)(IOTF)

45.9**

42.7

0.105

Overweight/obese (%)(WHO)

26.0/31.7*

29.2/21.5

<0.001

Overweight or obese (%)(WHO)

57.7*

50.7***

<0.001

Abdominal obesity (%)

33.3*

28.2

0.005