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

Table 4

Associations comparing standardized BMI 𝑧-score with standardized WHtR for estimating risk variable outcomes among lower-fatness students (𝑁 = 3,004).

Risk outcome	Boys (𝑛 = 1,398)					Girls (𝑛 = 1,606)
	BMI 𝑧-score		log WHtR			BMI 𝑧-score		Log WHtR
	Standardized beta	𝑅^2	Standardized beta	𝑅^2		Standardized beta	𝑅^2	Standardized beta	𝑅^2
	(95% CI)		(95% CI)			(95% CI)		(95% CI)
Log HOMA-IR	0.34	0.117	0.30	0.083		0.37	0.133	0.31	0.098
	(0.29–0.39)		(0.25–0.35)			(0.32–0.42)		(0.27–0.36)
Log Tchol/HDLchol	0.18	0.031	0.26	0.063		0.20	0.041	0.28	0.074
	(0.13–0.22)		(0.21–0.32)			(0.15–0.25)		(0.23–0.33)
Log HDL cholesterol	−0.19	0.038	−0.20	0.037		−0.22	0.049	−0.24	0.053
	(−0.24–−0.14)		(−0.26–−0.15)			(−0.27–−0.17)		(−0.29–−0.19)
Log triglycerides	0.14	0.018	0.22	0.042		0.13	0.015	0.17	0.031
	(0.09–0.19)		(0.16–0.27)			(0.08–0.18)		(0.12–0.22)
Systolic BP^a, mmHg	0.03^†	0.000	−0.01^†	<0.001		0.04^†	0.001	0.00^†	<0.001
	(−0.02–0.08)		(−0.06–0.04)			(−0.01–0.09)		(−0.05–0.05)
Log diastolic BP^a	0.03^†	0.000	0.05^†	0.002		0.04^†	0.001	0.05^†	0.002
	(−0.03–0.08)		(−0.00–0.11)			(−0.01–0.09)		(−0.00–0.10)
Glucose, mg/dL	0.06*	0.004	0.05^†	0.002		0.07*	0.004	0.04^†	0.002
	(0.01–0.11)		(−0.01–0.10)			(0.02–0.12)		(−0.02–0.09)

aModels for blood pressures include an additional adjustment for height.
𝑅² is the proportion of variation explained by the adiposity indicator.
All beta coefficients are 𝑃<0.001 with exception of ^∗(𝑃<0.05) and ^†(𝑃>0.05), not significant.