The adverse effect of grain dust exposure on lung function was shown by significant decrease of FVC, FEV_1, PEF, V_(75), V_(50) and V_(25) as compared with that of control.

• 肺功能的检查结果表明,接触组的FVC、FEV_1、PEF、V_(75)、V_(50)、V_(25)等指标较对照组有显著的下降,两组的差别有显著及极显著意义。