Table 2.

Estimated percent increase in sICAM-1 and sVCAM-1 levels per 0.3-μg/m³ increase in BC, for 4-, 8-, and 12-week averages.

	sICAM-1		sVCAM-1
Time period	Percent increase	95% CI	Percent increase	95% CI
4 weeks	1.50	0.22 to 2.80*	1.00	−0.65 to 2.67
8 weeks	1.58	0.18 to 3.00*	1.20	−0.58 to 3.02
12 weeks	1.49	0.04 to 2.95*	1.26	−0.58 to 3.14

^*p < 0.05.