Table 4.

Structural equations modeling (SEM) results for soil/dust contributions (%).

Variables	Model 1 (1989–2002)			Model 2 (1989–1998)			Model 3 (1989–2002)
	0–2 years	2–9 years	Valuea	0–2 years	2–9 years	Valuea	0–2 years	2–9 years	Valuea
Contribution of dust/soil ingestion
House dust	40	37	40	48	45	50	41	38	40
Yard	30	30	30	28	30	25	30	31	30
Neighborhood	11	11	10	9	10	10	11	11	10
Community	19	23	20	15	15	15	18	20	20
Contribution to lead in blood
House dust			17			22			16
Yard			35			34			33
Neighborhood			14			15			14
Community			34			29			37
aValues are rounded to total 100%.