Table 4. Multivariable correlations between the concentration of PPAR-γ in inducing sputum and the clinical characteristics.

Variables	r	P
FEV1%	0.362	0.004
RV%	−0.310	0.015
RV/TLC	−0.343	0.007
LAA%	−0.26	0.043
TIMP1 (U/L)	0.517	<0.001
MMP9 (μg/L)	−0.286	0.025
MMP9/TIMP1	−0.417	0.001