Table 2.

Univariate analyses of associations between various factors and MMP-9 in non-COPD and COPD, respectively

	Non-COPD		COPD
	Beta	P-value	Beta	P-value
Sex (female†)	−0.050	0.122	−0.070	0.087
Age‡	0.003	0.928	0.037	0.370
Underweight (normal weight†)	0.038	0.512	−0.039	0.560
Overweight (normal weight†)	−0.018	0.634	−0.051	0.266
Obese (normal weight†)	0.064	0.155	0.022	0.706
Pack years‡	0.096	0.003	0.115	0.005
Ex-smoker (non smoker†)	−0.011	0.744	0.098	0.052
Current smoker (non smoker†)	0.118	0.005	0.218	<0.001
Productive cough, prc (no prc†)	0.040	0.215	0.119	0.004
mMRC ≥ 2 (<2†)	0.029	0.377	0.049	0.238
FEV1% pred‡	−0.060	0.067	−0.131	0.001

^†reference value, ^‡continuous variable. Significant p-values, p < 0.050, in bold.