Table 3.

The Level of Cytokines in the Patients With COPD, Pneumonia and Lung Cancer.

Groups	IL-2 (pg/mL)	TNF-α (pg/mL)	IFN-γ (pg/mL)	IL-4 (pg/mL)	IL-6 (pg/mL)	IL-10 (pg/mL)
Controls	0.28 ± 0.11	0.11 ± 0.02	1.14 ± 0.28	0.16 ± 0.05	5.10 ± 2.79	1.42 ± 0.71
COPD	0.17 ± 0.07*	0.51 ± 0.12*	1.29 ± 0.44###	0.37 ± 0.13***##	10.75 ± 4.43###	3.74 ± 1.59*
Pneumonia	0.39 ± 0.15*###	0.27 ± 0.07*#	1.36 ± 0.21###	0.41 ± 0.12***##	9.88 ± 5.08###	4.23 ± 3.33**
Lung cancer	0.12 ± 0.07**	0.35 ± 0.13*	0.59 ± 0.26**	0.25 ± 0.11	31.98 ± 16.29***	2.80 ± 0.88*

*, P < 0.05; **, P < 0.01; ***, P < 0.001; comparison with the control group; ^#, P < 0.05; ^###, P < 0.001; comparison with the Lung cancer group, +++, P < 0.001; comparison with the pneumonia group.