Table 1.

Racial differences in exposure to traffic-related PM_2.5.

Racial Groups	Difference of Means	p-Value
African-Americans–Whites	0.1504 ***	<0.001
Hispanics–Whites	0.0563	0.2758
Others–Whites	0.1636 ***	<0.001
Hispanics–African-Americans	−0.0941*	0.0306
Others–African-Americans	0.0132	0.9907
Others–Hispanics	0.1073	0.1543

*** p ≤ 0.001; * p ≤ 0.05.