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. Author manuscript; available in PMC: 2012 Oct 1.

Published in final edited form as: Arch Environ Contam Toxicol. 2011 Feb 16;61(3):521–529. doi: 10.1007/s00244-011-9645-3

Table 4.

Summary of associations between genotype and Pb level in 306 children

Effect	Pb least square mean (95% CL)
Sex	Boys	Girls	Difference (95% CL)
	3.90 (3.26–4.54)	2.53 (2.03–3.02)	1.374 (0.74–2.02)^***
ALAD₂ × sex	Heterozygous boys	Null girls
	4.42 (3.25 to 5.58)	2.54 (2.21 to 2.86)	1.88 (0.62 to 3.14)^**
		Heterozygous girls
		2.52 (1.59 to 3.46)	1.89 (0.84 to 2.95)^**
		Null boys
		3.39 (3.05 to 3.73)	(1.02)^†
hPEPT2*2 × sex	Homozygous boys	Null boys
	5.62 (3.96 to 7.28)	3.26 (2.84 to 3.68)	2.37 (0.72 to 4.01)^**
		Heterozygous boys
		2.83 (2.32 to 3.33)	2.80 (1.12 to 4.48)^***
		Null girls
		2.72 (2.31 to 3.14)	2.90 (1.14 to 4.67)^***
		Heterozygous girls
		2.62 (2.08 to 3.16)	3.01 (1.20 to 4.82)^**
		Homozygous girls
		2.24 (0.96 to 3.53)	3.38 (2.03 to 4.73)^***

^†

P = 0.08,

^*

P ≤ 0.05,

^**

P ≤ 0.01,

^***

P ≤ 0.001