Further sensitivity analysis suggested that WBC (<4800 or >10,800 per mm3), IL-6 (>150 pg/ml), ferritin (>300 μg/liter), procalcitonin (>0.1 ng/ml) and C-reactive protein (>10 mg/liter) were still associated with in-hospital mortality risk in non-CHF patients but not in CHF patients by adjusted for age, Black, White, Asian, Latino, temperature, mean arterial pressure, oxygen saturation, MI, PVD, CVD, dementia, COPD, diabetes mellitus complicated and renal disease (Table 5). Here, IL6 is linked to chronic obstructive pulmonary disease.