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Table 7 Correlation of individual variables with ventilator-associated pneumonia diagnostic methods

From: A comparison of diagnostic algorithms and clinical parameters to diagnose ventilator-associated pneumonia: a prospective observational study

Parameter

Kappa agreement coefficient

CDC/NHSN

CPIS

Johanson

PCT > 0.5 ng/ml

0.061

0.423

0.470

Infiltrate on radiograph

− 0.045

0.874

0.738

Temperature

− 0.044

0.529

0.579

WBC

− 0.044

0.739

0.729

PaO2

− 0.038

0.094

-0.139

Tracheal culture

0.044

0.663

0.579

Blood culture

− 0.011

0.238

0.165

  1. CDC/NHSN: centers for disease control and prevention national health safety network; CPIS: Clinical Pulmonary Infection Score, HELICS: Hospital in Europe Link for Infection Control through Surveillance, PCT: Serum procalcitonin; WBC: White blood cell; PaO2: Partial pressure of O2 in arterial blood