Childhood Lead Exposure from Battery Recycling in Vietnam

Table 2

Multinomial logistic regression for child blood lead level categories, controlling for child and household effects.

Blood lead level (BLL)	Variable	Odds ratio	95% confidence interval		Signif. ()
30–44.9 g/dL	Age (years)
	6–10	()
	3–5	1.9	0.5	7.5	0.35
	0–2	0.7	0.2	2.6	0.60
	Current family involvement in recycling	5.2	1.6	16.8	0.01
	Brick yard surface	3.5	0.9	13.7	0.07
≥45 g/dL	Age (years)
	6–10	()
	3–5	7.8	1.6	38.0	0.01
	0–2	4.1	1.2	14.3	0.02
	Current family involvement in recycling	7.6	1.9	30.0	<0.001
	Brick yard surface	4.6	1.0	20.6	0.05

Current home recycling and proximity to recycling sites could not be included in the regression model due to zero values in reference cells.
1 in parentheses denotes reference age category. The BLL category 10–29.9 g/dL is the reference category for each of the other BLL categories.