DOI: 10.1001/jamanetworkopen.2026.36306 ISSN: 2574-3805

Short-Term Exposure to PM 2.5 and Emergency Department Visits for Asthma and Chronic Obstructive Pulmonary Disease

Anagh Kulkarni, Yohei Okada, Joel Aik, Fahad Javaid Siddiqui, Mariko Siyue Koh, Fintan Hughes, Tetsu Ohnuma, Vijay Krishnamoorthy, Marcus Eng Hock Ong

This cohort study evaluates the association between short-term fine particulate matter (PM 2.5 ) exposure and asthma- and chronic obstructive pulmonary disease (COPD)–related emergency department visits in Singapore.