Table 4 Correlation between blood lead and homocysteine levels by race/ethnic groups and blood lead quartiles.

	Correlation coefficient for blood lead and homocysteine levels
	Total (n = 422)	Quartile 1 (n = 103)	Quartile 2 (n = 108)	Quartile 3 (n = 108)	Quartile 4 (n = 103)
Race/ethnicity
Vietnamese	0.255* (n = 263)	0.232 (n = 61)	−0.041 (n = 61)	−0.058 (n = 68)	0.405* (n = 73)
Chinese	0.117 (n = 92)	−0.045 (n = 42)	−0.002 (n = 30)	0.006 (n = 17)	−0.904 (n = 3)
Malay	0.021 (n = 34)	−†	−0.061 (n = 7)	−0.214 (n = 14)	0.413 (n = 13)
Indians	0.286 (n = 33)	−†	−0.168 (n = 10)	−0.571 (n = 9)	0.031 (n = 14)

*p<0.01.

†Insufficient observations.