Table 2

- Comparisons of serum inflammatory markers and pulmonary function indices before and after the operation between the 2 groups.

Indexes	Infected group (n=51)				Uninfected group (n=227)				P-values^{^†}
	Before the operation (one day)^a	After the operation (7 days)	D-value^c	P-values^{^*}	Before the operation (one day) ^b	After the operation (7 days)	D-value^d	P-values^{^*}	a vs. b	c vs. d
IL-6 (ng/L)	1.24±0.26	16.19±2.63	13.84±2.07	<0.001	1.26±0.28	8.95±1.71	7.03±0.96	<0.001	0.862	<0.001
TNF-α (ng/mL)	1.18±0.33	19.64±3.07	17.56±2.18	<0.001	1.15±0.36	9.48±2.62	7.11±1.14	<0.001	0.619	<0.001
IL-1β (ng/L)	7.23±2.68	22.49±5.13	14.77±2.45	<0.001	7.41±2.82	15.03±4.29	6.98±1.92	<0.001	0.724	<0.001
WBC (×10⁹/L)	6.75±1.96	12.65±2.14	5.83±0.67	<0.001	6.81±2.02	9.04±1.81	2.21±0.56	<0.001	0.707	<0.001
NEU%	56.14±7.19	67.04±10.48	10.39±1.21	<0.001	55.73±8.71	61.03±9.35	4.04±0.52	<0.001	0.597	<0.001
PLT (×10⁹/L)	223.64±67.48	249.82±63.26	24.20±4.39	<0.001	225.78±69.32	236.13±67.51	10.32±2.21	<0.001	0.621	<0.001
FEV₁ (L)	2.86±0.18	0.95±0.09	-1.93±0.08	<0.001	2.81±0.12	1.48±0.10	-1.21±0.07	<0.001	0.806	<0.001
FVC (L)	3.28±0.52	1.91±0.47	-1.35±0.22	<0.001	3.31±0.56	2.59±0.66	0.68±0.12	<0.001	0.753	<0.001
FEV1/FVC (%)	87.24±3.19	48.82±3.05	-38.34±2.72	<0.001	87.78±3.07	59.31±3.05	26.48±2.09	<0.001	0.776	<0.001

Values are presented as mean ± standard deviation (SD).

TNF: tumor necrosis factor, IL: interleukin, WBC: white blood cell, NEU%: percentage of neutrophils, PLT: platelet, FEV1: forced expiratory volume in one second, FVC: forced vital capacity, vs: versus

↵ ^* Indicates paired t-test.
↵ ^† Indicates independent samples t-test.