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. Author manuscript; available in PMC: 2015 Sep 22.
Published in final edited form as: Int J Body Compos Res. 2013;11(3-4):85–96.

Table 2.

Partial Pearson correlationsa of BMI to %FM and FMI and of WC and WHtR to %TFMb,c.

n d BMI WC WHtR
%FM FMI %TFM
All youth 7013 0.79 0.94 0.84 0.90
Race-ethnicity
   Mexican Americans 2425 0.80 0.95 0.85 0.89
   Non-Hispanic Whites 1779 0.80 0.94 0.85 0.90
   Non-Hispanic Blacks 2270 0.82 0.96 0.87 0.90
Boys
   8-19 years 4209 0.81 0.94 0.88 0.91
   8-11 years 948 0.86 0.96 0.90 0.91
   12-19 years 3261 0.80 0.94 0.88 0.92
Girls
   8-19 years 2804 0.82 0.97 0.85 0.89
   8-11 years 651 0.85 0.97 0.87 0.89
   12-19 years 2153 0.83 0.97 0.86 0.89
a

Pearson correlation coefficients were adjusted for age in years, gender and race-ethnicity whenever applicable. Each correlation coefficient is significantly different from 0 (P < 0.0001).

b

%TFM was calculated as total trunk fat mass divided by total trunk mass times 100.

c

Abbreviations: BMI for body mass index, %FM for percent fat mass, FMI for fat mass index, WC for waist circumference, WHtR for waist-to-height ratio, %TFM for percent trunk fat mass.

d

Analytic sample sizes (n) were unweighted. DXA data were not collected for girls aged 8-17 years in 1999-2000 due to unresolved Institutional Review Board issues concerning the reporting pregnancy test results in minors.