. Author manuscript; available in PMC: 2009 Mar 1.

Published in final edited form as: Neurotoxicology. 2007 Dec 15;29(2):278–285. doi: 10.1016/j.neuro.2007.11.006

Table 4.

Relationship between childhood blood lead and Mental Development Index and Psychomotor Development Index scales using repeated measures at 24, 30 and 36 stratified by quartiles of the Coopersmith self-esteem score

	Mental Development Index β (SE) p-value Quartile of maternal self-esteem				Psychomotor Development Index β (SE) p-value Quartile of maternal self-esteem
	1^st (low)	2^nd	3^rd	4^th (high)	1^st (low)	2^nd	3^rd	4^th (high)
	n=145	n=148	n=178	n=136	n=146	n=147	n=178	n=135
Child blood lead	−0.17(0.25)	−0.40(0.25)	−0.35(0.31)	0.37(0.44)	0.22(0.26)	−0.82(0.23)	−0.12(0.33)	0.50(0.40)
(24 mo) μg/dL	p=0.50	p=0.12	p=0.25	p=0.40	p=0.41	p<0.01	p=0.71	p=0.22

Models are adjusted for cohort, child gender, mothers IQ, and mother's educational attainment, parity, smoking, and alcohol consumption.