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