• Coralynn S Sack, Brent C Doney, Anna J Podolanczuk, Laura G Hooper, Noah S Seixas, Eric A Hoffman, Steven M Kawut, Sverre Vedal, Ganesh Raghu, R Graham Barr, David J Lederer, and Joel D Kaufman.
• 1 Division of Pulmonary and Critical Care, Department of Medicine, and.
• Am. J. Respir. Crit. Care Med. 2017 Oct 15; 196 (8): 1031-1039.

RationaleThe impact of a broad range of occupational exposures on subclinical interstitial lung disease (ILD) has not been studied.ObjectivesTo determine whether occupational exposures to vapors, gas, dust, and fumes (VGDF) are associated with high-attenuation areas (HAA) and interstitial lung abnormalities (ILA), which are quantitative and qualitative computed tomography (CT)-based measurements of subclinical ILD, respectively.MethodsWe performed analyses of participants enrolled in MESA (Multi-Ethnic Study of Atherosclerosis), a population-based cohort aged 45-84 years at recruitment. HAA was measured at baseline and on serial cardiac CT scans in 5,702 participants. ILA was ascertained in a subset of 2,312 participants who underwent full-lung CT scanning at 10-year follow-up. Occupational exposures were assessed by self-reported VGDF exposure and by job-exposure matrix (JEM). Linear mixed models and logistic regression were used to determine whether occupational exposures were associated with log-transformed HAA and ILA. Models were adjusted for age, sex, race/ethnicity, education, employment status, tobacco use, and scanner technology.Measurements And Main ResultsEach JEM score increment in VGDF exposure was associated with 2.64% greater HAA (95% confidence interval [CI], 1.23-4.19%). Self-reported vapors/gas exposure was associated with an increased odds of ILA among those currently employed (1.76-fold; 95% CI, 1.09-2.84) and those less than 65 years old (1.97-fold; 95% CI, 1.16-3.35). There was no consistent evidence that occupational exposures were associated with progression of HAA over the follow-up period.ConclusionsJEM-assigned and self-reported exposures to VGDF were associated with measurements of subclinical ILD in community-dwelling adults.

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