Baseline clinical and biochemical characteristics of survivor and non-survivor patients.

COPD  =  chronic obstructive pulmonary disease; CNS  =  Central Nervous System; PaO2/FIO2  =  pressure of arterial oxygen/fraction inspired oxygen; INR  =  international normalized ratio; aPTT  =  activated partial thromboplastin time; SOFA  =  Sepsis-related Organ Failure Assessment score; APACHE II  =  Acute Physiology and Chronic Health Evaluation; MMP  =  matrix metalloproteinase; TIMP  =  tissue inhibitor of matrix metalloproteinase; TNF  =  tumour necrosis factor; IL  =  Interleukin; PAI  =  Plasminogen activator inhibitor.