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Table 3 Correlations of body mass index (BMI) and percent body fat (%BF) or waist circumference (WC) by obesity or non-obesity according to the obese definition of Centers for Disease Control and Prevention

From: Relationship of body mass index to percent body fat and waist circumference among schoolchildren in Japan - the influence of gender and obesity: a population-based cross-sectional study

 

Boys

Girls

 

Fourth graders

Seventh graders

Fourth graders

Seventh graders

 

Non-obesity

(n = 967)

Obesity

(n = 87)

Non-obesity

(n = 825)

Obesity

(n = 53)

Non-obesity

(n = 959)

Obesity

(n = 31)

Non-obesity

(n = 810)

Obesity

(n = 18)

%BF vs. BMI

0.60

0.45

0.54

0.20

0.96

0.71

0.96

0.78

WC vs. BMI

0.87

0.86

0.87

0.85

0.86

0.72

0.85

0.79

  1. Fourth graders are aged 9 or 10 years
  2. Seventh graders are aged 12 or 13 years
  3. Values are Pearson's correlation coefficients
  4. All values are statistically significant except the value of obese seventh-grade boys