[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 1

Comparison of the general data (n = 49).

Observed indexes	Reference group	Study group	X^2/t	P
Age (years old)	64.72 ± 6.08	65.13 ± 6.15	0.332	0.741
BMI (kg/m^2)	23.12 ± 3.01	23.24 ± 2.85	0.203	0.840
Course of disease (years)	9.05 ± 3.26	9.17 ± 3.15	0.185	0.853
Sex
Male	29 (59.18)	31 (63.27)	0.172	0.678
Female	20 (40.82)	18 (36.73)
Smoker	23 (46.94)	22 (44.90)	0.041	0.839
Drinker	25 (51.02)	24 (48.98)	0.041	0.840
Education level
Under junior high school	21 (42.86)	19 (38.78)	0.169	0.681
Junior high school	16 (32.65)	17 (34.69)	0.046	0.831
Above junior high school	12 (24.49)	13 (26.53)	0.054	0.817
Place of residence
Urban areas	31 (63.27)	33 (67.35)	0.180	0.671
Rural areas	18 (36.73)	16 (32.65)