. 2022 Apr 28;2022:6975236. doi: 10.1155/2022/6975236

Table 4.

Comparison of pulmonary function indexes between the two groups ( $\bar{x} \pm s$ , L).

Groups	Number of cases	FEV1		FVC		MVV
Groups	Number of cases	Presurgery	3 months after surgery	Presurgery	3 months after surgery	Presurgery	3 months after surgery
Observation group	47	2.48 ± 0.50	2.04 ± 0.49^a	2.86 ± 0.57	2.39 ± 0.47^a	78.65 ± 9.94	69.35 ± 7.26^a
Control group	47	2.53 ± 0.54	1.65 ± 0.43^a	2.92 ± 0.54	1.98 ± 0.45^a	80.02 ± 10.26	58.47 ± 6.84^a
t		0.466	4.101	0.524	4.320	0.657	7.478
P		0.643	0.001	0.602	0.001	0.513	0.001

Note: ^aP < 0.05, compared with the group before surgery. FEV1: forced vital capacity in 1 second; FVC: forced vital capacity; MVV: maximal voluntary ventilation.