Table 2.

Comparison of pulmonary function indicators in both groups

Group	Number of cases	FVC pre-intervention, L	FVC post-intervention, L	FEV1 pre-intervention, L	FEV1 post-intervention, L	PEF pre-intervention, L/s	PEF post-intervention, L/s
Intervention	60	2.38 ± 0.19	3.78 ± 0.25	1.78 ± 0.16	3.26 ± 0.19	5.27 ± 0.32	7.25 ± 0.25
Control	60	2.42 ± 0.21	3.07 ± 0.22	1.80 ± 0.19	2.28 ± 0.16	5.24 ± 0.36	5.83 ± 0.23
t value	-	0.868	16.605	0.665	30.908	0.499	32.288
P value	-	0.43	< 0.001	0.553	< 0.001	0.665	< 0.001

FEV1: Forced expiratory volume in 1 second; FVC: Forced vital capacity; PEF: Peak expiratory flow.