Table 3.

Comparison of lung function at different time points between the 2 groups.

Group	FVC (L)		FEV1 (L)		MVV (L/min)
	Pre-intervention	Post-intervention	Pre-intervention	Post-intervention	Pre-intervention	Post-intervention
Control group	1.06 ± 0.17	1.83 ± 0.62	0.50 ± 0.43	1.05 ± 0.55*	40.79 ± 7.81	50.32 ± 8.41
Observation group	1.08 ± 0.13	2.55 ± 0.71	0.48 ± 0.75	1.49 ± 0.71*	40.53 ± 8.42	55.48 ± 7.69
t-value	−0.699	−8.278	0.512	5.942	0.238	8.431
P value	.486	.000	.394	.000	.568	.000

FEV1 = forced expiratory volume in 1 second, FVC = forced vital capacity, MVV = maximal voluntary ventilation.

^*P < .05.