IL6 and ventilator-associated pneumonia: Comparing inflammation markers (C reactive protein (CRP), procalcitonin (PCT), leukocyte count, and interleukin 6 (IL-6)) at the time of intubation between patients with vs. without later development of VAP, there was a significant difference of CRP and PCT in patients with vs. without VAP (median CRP 12 mg/dl vs. 18 mg/dl, p-value 0.042, median PCT 0.4 ng/mL vs. 0.8 ng/mL, p-value 0.041).