表 4.

两组患者术前术后肺功能指标比较（Mean±SD）

Comparison of pulmonary function indexes between the two groups before and after operation (Mean±SD)

Time	Pulmonary function index	Precision group (n=30)	Traditional group (n=30)	t	P
FVC: forced vital capacity; FEV1: forced expiratory volume in one second; DLCO: carbon monoxide diffusing capacity.
Before operation	FVC (L)	3.65±0.63	3.54±0.64	0.658	0.513
	FEV1 (L)	2.72±0.50	2.54±0.48	1.396	0.168
	DLCO (mL/mmHg/min)	20.36±3.02	19.16±3.18	1.506	0.137
1 month after operation	FVC (L)	3.35±0.63	2.89±0.57	2.930	0.005
	FEV1 (L)	2.39±0.54	2.09±0.48	2.270	0.027
	DLCO (mL/mmHg/min)	17.43±3.10	15.78±2.86	2.135	0.037
3 months after operation	FVC (L)	3.47±0.63	3.20±0.56	1.716	0.091
	FEV1 (L)	2.55±0.49	2.29±0.48	2.016	0.048
	DLCO (mL/mmHg/min)	19.38±3.02	17.79±3.21	1.970	0.054