CALCA and ventilator-associated pneumonia: In another cohort, involving 101 patients with a diagnosis of VAP significantlyincreased PCT levels upon admission were observed among non-survivors ascompared to survivors (1.36ng/mL versus 0.58ng/mL; p = 0.017).(45) The average relative decreasein PCT levels 72 hours after the onset of symptoms was 26% in survivors and 7%in non-survivors.