Monitoring metrics for short-term exposure to ambient ozone and pulmonary function and airway inflammation in healthy young adults

To assess the associations of different monitoring metrics for short-term exposure to ambient ozone (O ) with pulmonary function and airway inflammation in healthy young adults. A total of 97 healthy young college students were recruited and followed in a panel study conducted from December 2017 to June 2018. Each participant underwent 3 follow-up visits, and lung function and fractional exhaled nitric oxide (FeNO) were measured at each visit. Ambient air pollutant concentrations were obtained from the environment monitoring station of Beijing closest to the participant residences, and meteorological data were collected from China Meteorological Data Service Center. Linear mixed-effect models were applied to assess the associations between different monitoring metrics for ambient O short-term exposure with pulmonary function or airway inflammation in the healthy young adults. During the study period, the P (P , P ) values for ambient O concentration expressed as daily 1-hour maximum (O -1 h max), daily maximu