Accuracy of non-invasive and invasive diagnostic techniques for ventilator associated pneumonia
| Diagnostic technique | Sensitivity % (n) | Specificity % (n) | Positive predictive value % (n) | Negative predictive value % (n) |
|---|---|---|---|---|
| TBA | 69 (9/13) | 92 (11/12) | 90 (9/10) | 73 (11/15) |
| Protected BAL | 39 (5/13) | 100 (12/12) | 100 (5/5) | 60 (12/20) |
| BAL | 77 (10/13) | 58 (7/12) | 67 (10/15) | 70 (7/10) |
| PSB | 62 (8/13) | 75 (9/12) | 73 (8/11) | 64 (9/14) |
| Any invasive diagnostic technique | 85 (11/13) | 50 (6/12) | 65 (11/17) | 75 (6/8) |
| Any non-invasive or invasive diagnostic technique | 85 (11/13) | 50 (6/12) | 65 (11/17) | 75 (6/8) |
TBA = tracheobronchial aspirates; BAL = bronchoalveolar lavage; PSB = protected specimen brush.
For definition of terms see footnote to table 2.