Table 2.

Associations Between Time-Varying Exposure to PM_2.5 and Health Risk Score Variables in a Cohort of Actively Employed US Aluminum Workers, 1998–2012^a

Facility Type	Change in Risk Score Associated With Past Exposureb		Probability of Being Exposed Associated With a 1-Decile Increase in Risk Scorec
	Change	95% CI	OR	95% CI
Smelting	0.07	0.00, 0.13	0.94	0.91, 0.96
Fabrication	0.03	−0.03, 0.08	0.96	0.94, 0.98

Abbreviations: CI, confidence interval; OR, odds ratio; PM_2.5, particulate matter with aerodynamic diameter of 2.5 μm or less.

^a Exposure defined using the 10th percentile as cutoff.

^b Linear regression model controlling for risk score in the previous year; age; sex; race; smoking status; body mass index (weight (kg)/height (m)²); job grade; plant; and diagnosis of diabetes, hypertension, or dyslipidemia.

^c Logistic regression model controlling for exposure status in the previous year, age, sex, race, smoking status, body mass index, job grade, and plant.