Effects of long-term exposure to major outdoor air pollutants for the risk of chronic inflammatory airway diseases in adults with potential interaction detection in Taiwan Biobank

•Studies on chronic inflammatory airway diseases for long-term outdoor air pollutant exposure in adults were scarce.•Ten-year accumulative exposures of major outdoor air pollutants were estimated by Kriging's method in Taiwan Biobank.•Long-term exposures of NO2 and SO2 were found significant to increase risks of chronic inflammatory airway diseases.•A synergistic interaction between PM10 and CO was detected, suggesting a mechanism in pathogenesis.