alexa Chronic obstructive pulmonary disease mortality in railroad workers.
Infectious Diseases

Infectious Diseases

Epidemiology: Open Access

Author(s): Hart JE, Laden F, Eisen EA, Smith TJ, Garshick E

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Abstract BACKGROUND: There is little information describing the risk of non-malignant respiratory disease and occupational exposure to diesel exhaust. METHODS: US railroad workers have been exposed to diesel exhaust since diesel locomotives were introduced after World War II. In a retrospective cohort study we examined the association of chronic obstructive pulmonary disease (COPD) mortality with years of work in diesel-exposed jobs. To examine the possible confounding effects of smoking, multiple imputation was used to model smoking history. A Cox proportional hazards model was used to estimate an incidence rate ratio, adjusted for age, calendar year, and length of follow-up after leaving work (to reduce bias due to a healthy worker survivor effect). RESULTS: Workers in jobs with diesel exhaust exposure had an increased risk of COPD mortality relative to those in unexposed jobs. Workers hired after the introduction of diesel locomotives had a 2.5\% increase in COPD mortality risk for each additional year of work in a diesel-exposed job. This risk was only slightly attenuated after adjustment for imputed smoking history. CONCLUSIONS: These results support an association between occupational exposure to diesel exhaust and COPD mortality.
This article was published in Occup Environ Med and referenced in Epidemiology: Open Access

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