The pulmonary function such as FVC,FEV_1, MMF, PF, V_(75), V_(56), V_(2?) reducedmarkedly in individuals with positive BPT.

• BPT阳性者的肺功能指标FVC、FEV_1、MMF、PF、V_(75)、V_(50)、V_(25)等均有明显降低。