Longitudinal Lung Function Assessment of Cohort.

*Median (IQR). FEV1, Forced Expiratory Volume in one second; FVC, Forced Vital capacity; BDR, Bronchodilator Response; MCT, Methacholine Challenge Testing; PC20, Provocative concentration of methacholine that results in a 20% drop in FEV1; TLC, Total Lung Capacity; RV, Residual Volume; DLco, Diffusing Capacity of the Lung for Carbon Monoxide; VA, Alveolar Ventilation; BWT, Bronchial Wall Thickening.* 中位数（四分位间距，Interquartile Range，IQR）。 第一秒用力呼气容积（Forced Expiratory Volume in one second，FEV1）；用力肺活量（Forced Vital Capacity，FVC）；支气管舒张反应（Bronchodilator Response，BDR）；乙酰甲胆碱激发试验（Methacholine Challenge Testing，MCT）；可引发FEV1下降20%的乙酰甲胆碱激发浓度（Provocative concentration of methacholine that results in a 20% drop in FEV1，PC20）；肺总量（Total Lung Capacity，TLC）；残气量（Residual Volume，RV）；肺一氧化碳弥散量（Diffusing Capacity of the Lung for Carbon Monoxide，DLco）；肺泡通气量（Alveolar Ventilation，VA）；支气管壁增厚（Bronchial Wall Thickening，BWT）。