Sensitivity, specificity, positive and negative predictive values, and accuracy of the diagnostic criteria, for pneumonia#
| Criterion | Sensitivity % | Specificity % | PPV % | NPV % | Accuracy % |
| Clinical | 83 | 100 | 100 | 67 | 24 |
| Radiological | 90 | 100 | 100 | 67 | 27 |
| Laboratory | 11 | 67 | 50 | 20 | 26 |
| Microbiological | 67 | 67 | 86 | 40 | 24 |
| Macroscopic | 100 | 83 | 95 | 100 | 24 |
| Histological | 100 | 83 | 95 | 100 | 24 |
PPV: positive predictive value; NPV: negative predictive value. #: estimated by the method of Sackett et al. 24.