Table 1. Patient characteristics

 COPDHFP value
Age (years)73±1076±110.422
Gender (% male)40700.057
APACHE II15.4±3.515.9±3.00.628
Charlson Index2.3±1.92.6±1.50.588
Pack years51±3511±16<0.001
FEV1:FVC (%)56±1471±160.024