3.

PPR组COPD亚组肺功能指标增加情况

The added value of pulmonary function in various degree COPD

	Mild COPD	Moderate to severe COPD	t	P
FEV1 added value (L)	0.06±0.05 (2.8%)	0.16±0.05 (8.6%)	6.628	0.000
FVC added value (L)	0.00±0.19 (0.0%)	0.05±0.17 (1.7%)	0.793	0.432
PEF added value (L/s)	0.81±0.23 (17.9%)	0.87±0.21 (22.6%)	0.868	0.390
MVV added value (L/min)	0.90±5.59 (1.0%)	2.80±6.20 (3.4%)	0.968	0.339