Table 2.

Correlations of body mass index (BMI) and percent body fat (%BF) or waist circumference (WC) for each gender by grade

	Fourth graders		Seventh graders
	Boys (n = 1,054)	Girls (n = 990)	Boys (n = 878)	Girls (n = 828)
%BF vs. BMI	0.74	0.97	0.69	0.96
WC vs. BMI	0.94	0.90	0.94	0.88

Fourth graders are aged 9 or 10 years

Seventh graders are aged 12 or 13 years

Values are Pearson's correlation coefficients

All values were statistically significant