Table 2. Pearson correlations between blood lead concentrations and IQ and school performance.

		Mean (SD)	N‡	Blood lead concentration	VIQ	PIQ	FIQ	Chinese	Math
Blood lead concentrations (µg/dL)		6.43(2.64)	1341	1.00
IQ	VIQ	103.95(14.84)	1331	.011	1.00
	PIQ	104.06(15.07)	1331	−.056*	.498***	1.00
	FIQ	104.19(14.38)	1331	−.026	.869***	.857***	1.00
School Performance	Chinese	87.87(11.11)	561	−.234***	.241***	.344***	.305***	1.00
	Math	88.80(11.67)	561	−.200***	.242***	.391***	.375***	.511***	1.00
	English	89.58(13.22)	562	−.207***	.153***	.334***	.294***	.666***	.696***

^*p<.05;

^**p<.01,

^***p<.001.

^‡Number of children differs across sample characteristics due to missing values.