Table 4.
Sensitivity, specificity, and Youden index for assessed methods of ventilator-associated pneumonia diagnosis compared to the HELICS criteria as the reference standard
| Criteria | Ventilator-Associate Pneumonia | % Sensitivity | % Specificity | Youden index a | ||
|---|---|---|---|---|---|---|
| Positive | Negative | Total | ||||
| CDC/NHSN | ||||||
| Positive | 45 | 38 | 83 | 54.22 | 100 | 0.542 |
| Negative | 0 | 2 | 2 | |||
| Total | 45 | 40 | 85 | |||
| CPIS | ||||||
| Positive | 44 | 20 | 64 | 68.75 | 95.23 | 0.640 |
| Negative | 1 | 20 | 21 | |||
| Total | 45 | 40 | 85 | |||
| Johanson | ||||||
| Positive | 44 | 21 | 65 | 67.69 | 95 | 0.627 |
| Negative | 1 | 19 | 20 | |||
| Total | 45 | 40 | 85 | |||
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
aA measure of the maximum diagnostic accuracy, where 1 signifies a perfect test and 0 signifies no diagnostic value