[Retracted] Effect of Yifei-Huoxue Decoction Combined with Tiotropium on Inflammatory Cytokine Levels, Pulmonary Function, and Quality of Life in Patients with Chronic Obstructive Pulmonary Disease

Table 3

Patients’ pulmonary function indexes.

Observed indexes		Reference group (n = 49)	Study group (n = 49)	t	P
FVC (L)	Before treatment	2.16 ± 0.22	2.14 ± 0.20	0.471	0.639
	After treatment	2.50 ± 0.21	2.75 ± 0.24	5.488	<0.001
FEV1 (L)	Before treatment	1.26 ± 0.29	1.25 ± 0.31	0.165	0.869
	After treatment	1.55 ± 0.34	1.86 ± 0.32	4.678	<0.001
FEV1/FVC (%)	Before treatment	55.33 ± 4.62	55.51 ± 4.58	0.194	0.847
	After treatment	60.82 ± 5.11	74.10 ± 5.20	12.751	<0.001