Table 3. Serum and BALF IL-17 and TGF-β1 levels in two asthma groups ($\overline{x}\pm s$, ng/L).

Group	n	Serum			BALF
		IL-17	TGF-β1		IL-17	TGF-β1
Mild asthma group	19	1.39±0.04	128±3		3.44±0.15	164±21
Moderate to severe group	37	3.32±0.08	215±28		5.24±0.26	241±32
t value		6.094	6.083		6.084	5.702
P value		<0.001	<0.001		<0.001	<0.001