According to different staging criteria the severity of pulmonary disfunction in 16(20.77%) cases were consistent(VC and FEV_1/FVC).

• 77例肺功能结果按肺功能不全分级表中肺活量(VC)实测值/预计值指标和第一秒钟用力呼气容积(FEV1)/用力肺活量(FVC)指标分别进行分级；按两标准分级完全一致的有16例；占20.；77%25;