. Author manuscript; available in PMC: 2021 May 27.

Published in final edited form as: Toxicol Appl Pharmacol. 2013 Oct 4;273(3):516–523. doi: 10.1016/j.taap.2013.09.022

Table 2.

Multilinear regression (β coefficients and SE) between BMI Z-score and BLL quartile in children and adolescent participants in NHANES 1999–2006 and by NHANES cycle 1999 = 2002 and 2003–2006.^a

	NHANES 1999–2006		NHANES 1999–2002		NHANES 2003–2006
	% (SE)^b	β (SE)	% (SE)^b	β (SE)	% (SE)^b	β (SE)

BLL quartile 1 (≤0.70 μg/dL)	24.9(0.98)	0 (reference)	20.3 (1.02)	0 (reference)	29.4 (1.55)	0 (reference)
BLL quartile 2 (0.71–1.09 μg/dL)	24.6 (0.76)	−0.06 (0.04) p = 0.20	22.0 (0.96)	0.01 (0.07) p = 0.95	27.1 (1.12)	−0.10 (0.06) p = 0.10
BLL quartile 3 (1.10–1.60 μg/dL)	25.6 (0.61)	−0.15 (0.06) p = 0.01	28.7 (0.77)	−0.16 (0.10) p = 0.13	22.6 (0.93)	−0.13 (0.07) p = 0.10
BLL quartile 4 (≥1.61 μg/dL)	24.9 (1.02)	−0.33 (0.07) p ≤ 0.01	29.0 (1.41)	−0.31 (0.12) p ≤ 0.01	20.9 (1.30)	−0.31 (0.08) p ≤ 0.01
p trend		p ≤ 0.01		p = 0.03		p ≤ 0.01

Adjusted for age, gender, race/ethnicity, hematocrit, calorie intake, TV and video game use, serum cotinine, and poverty income ratio.

Percentages are sample-weighted for applicability to the U.S. population.