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Table 2 Main characteristics of the included patients at the time nosocomial infection was clinically suspected.

From: Serum procalcitonin for the early recognition of nosocomial infection in the critically ill patients: a preliminary report

Mean (SD) or number (%) Nosocomial infection
n = 47
Unproven nosocomial infection
n = 23
p
Time elapsed from ICU admission (N. of days) 16.1 (10.8) 13.5 (7.9) 0.307
Mechanical ventilation length (N. of days) 18.2 (16.5) 13.5 (9.0) 0.214
Temperature (°C) 37.6 (1.5) 37.6 (1.3) 0.958
Heart rate (bpm) 110 (23) 105 (25) 0.387
Respiratory rate (bpm) 30 (8) 28.1 (7) 0.367
PaO2/FIO2 (mmHg) 226 (125) 217 (119) 0.777
MAP (mmHg) 64 (15) 73 (20) 0.061
Vasopressor requirement (Yes/No) 20 (42) 6 (26.1) 0.282
SOFA score 6.9 (4.1) 7.2 (3.9) 0.706
Previous exposure to steroids 20 (42) 6 (26.1) 0.282
WBC count (103 cells/mm3) 17.1 (11.8) 13.6 (7.0) 0.226
CRP (mg/L) 130.1 (104.3) 95.6 (60.5) 0.238
PCT D0 (ng/mL) 5.5 (9.4) 0.7 (1.2) 0.018
ΔPCTD-1, D0 * +5.8 (1.3) -0.5 (10.4) 0.035
ΔPCTD-2, D0 ** +2.7 (6.9) -0.9 (2.2) 0.048
ΔPCTD-3, D0 *** +4.3 (10.1) -1.2 (2.7) 0.032
Platelet count (cell/mm3) 185,459 (118,375) 235,935 (183,485) 0.028
Creatininemia (μmol/L) 172.6 (136.9) 146.3 (164.9) 0.492
Lactate (mmol/L) 2.1 (0.9) 1.5 (0.4) 0.055
  1. ICU: Intensive Care Unit; MAP: Mean Arterial Pressure; SOFA: Sepsis-related Organ Failure Assessment; WBC: White Blood Cell; CRP: C-reactive Protein; PCT: Procalcitonin; ΔPCTD-1, D0 = PCT D0 – PCT D-1; D0: day when infection is clinically suspected.
  2. *available in 45 out of the 70 included patients; **available in 44 out of the 70 included patients; ***available in 51 out of the 70 included patients.