Table 5.

Point estimates ± SEs and 95% CIs for the different pollutants, using naïve analysis and with bootstrap correction for measurement error in covariate of interest.

PM2.5 component	Analysis/­correction	β̂xa±SE	95% CI
EC (μg/m3)	Naïve	0.001±0.014	–0.03, 0.03
	PB,b λ=0	0.001±0.015	–0.03, 0.03
	PB, λ=1	0.001±0.015	–0.03, 0.03
OC (μg/m3)	Naïve	0.025±0.008	0.01, 0.04
	PB, λ=0	0.025±0.008	0.01, 0.04
	PB, λ=1	0.025±0.008	0.01, 0.04
Si (ng/m3)	Naïve	0.408±0.081	0.25, 0.57
	PB, λ=0	0.408±0.126	0.16, 0.66
	PB, λ=1	0.408±0.127	0.16, 0.66
S (μg/m3)	Naïve	0.055±0.017	0.022, 0.088
	PB, λ=0	0.055±0.025	0.006, 0.104
	PB, λ=1	0.055±0.025	0.006, 0.104
Point estimates are estimates of the increase in CIMT for a 1-unit increase in each pollutant. aIn the case of λ=1, β̂x refers to the estimate corrected for any bias from ­classical-like error. bPB refers to results from parame­ter bootstrap implemented with given value of λ.