Table 5.

Cognitive mental development in children 12 months through 36 months of age by GEE (n = 543 measurements).^a

	MDI		PDI
	β	p-Value	β	p-Value
Intercept	60.46	< 0.01	84.76	< 0.01
24 months	−9.87	< 0.01	−2.12	0.20
36 months	−4.29	0.01	3.53	0.08
PAHs	0.69	0.66	1.89	0.35
24 months × PAHs	−1.12	0.62	−3.14	0.16
36 months × PAHs	−5.57	0.01	−4.65	0.08
Ethnicity (1 = African American; 0 = others)	−0.23	0.88	−3.38	0.07
24 months × ethnicity	6.80	< 0.01	5.71	0.01
36 months × ethnicity	7.14	< 0.01	7.91	< 0.01
Sex (1 = male)	−2.80	0.01	0.08	0.95
Gestational age	0.56	0.16	0.23	0.62
Home environment	0.31	< 0.01	0.11	0.39

^aModels were also adjusted for prenatal ETS and CPF.