Cardiometabolic Risk Assessments by Body Mass Index z-Score or Waist-to-Height Ratio in a Multiethnic Sample of Sixth-Graders

Table 2

Distributions of adiposity indicators and ancestral groups. The analytic sample is divided into four mutually exclusive subpopulations by sex and fatness level.

	Boys	Girls
High fatness^a
𝑛	1,187	1,291
Body mass index, median (p25, p75)	25.9 (23.6, 29.2)	25.8 (23.4, 29.3)
BMI𝑧, median (p25, p75)	1.91 (1.60, 2.20)	1.78 (1.41, 2.14)
WHtR, median (p25, p75)	0.574 (0.533, 0.625)	0.562 (0.524, 0.614)
Ancestry^b (H/B/W/other), %	61.0 / 13.1 / 18.8 / 7.2	58.6 / 18.4 / 15.4 / 7.5
Lower fatness
𝑛	1,398	1,606
Body mass index, median (p25, p75)	18.3 (16.9, 19.8)	18.3 (16.8, 19.9)
BMI𝑧, median (p25, p75)	0.258 (−0.361, 0.754)	0.170 (−0.443, 0.657)
WHtR, median (p25, p75)	0.432 (0.408, 0.457)	0.436 (0.411, 0.460)
Ancestry^b (H/B/W/other), %	44.8 / 23.0 / 23.2 / 9.0	50.0 / 20.8 / 20.1 / 9.1

aHigh-fatness students identified by being above the sex-specific median value for both BMI 𝑧-score and WHtR; the remaining students were designated as lower-fatness.
^bH: Hispanic; B: non-Hispanic black; W: non-Hispanic white.
p25 and p75 represent the 25th and 75th percentile values, respectively.