• Chami Im, Dong Hyun Kim, and Tak Kyu Oh.
• Interdepartment of Critical Care Medicine (Dr Im); Department of Surgery (Dr Im); Department of Occupational and Environmental Medicine, Shihwa Medical Center, Siheumg-si (Dr Kim); Department of Anesthesiology and Pain Medicine (Dr Oh), Seoul National University Bundang Hospital, Seongnam, South Korea.
• J. Occup. Environ. Med. 2020 Feb 1; 62 (2): 93-97.

ObjectiveWe investigated the association between preadmission exposure to air pollutants and 90-day mortality in critically ill patients.MethodsThis retrospective cohort study analyzed the medical records of adult patients (more than or equal to 18 years) admitted to the intensive care unit of a tertiary academic hospital from 2015 to 2016.ResultsFour air pollutants were not significantly associated with 90-day mortality and pulmonary disease-related 90-day mortality (P > 0.05). In patients with preadmission chronic obstructive lung disease (COPD), a 1 ppm increase in ozone (O3) and carbon monoxide (CO) was associated with a 1.04-fold and 5.99-fold increase in pulmonary disease-related 90-day mortality, respectively.ConclusionsPreadmission exposure to air pollution was not associated with 90-day mortality in critically ill patients. However, a higher concentration of CO and O3 was associated with an increase in pulmonary disease-related 90-day mortality in patients with preadmission COPD.

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