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| Impact | Positive | None | Negative | |
| Diagnosis | TP | TN | FN | FP* |
| No. (%) | 24 (36.9%) | 7 (10.8%) | 4 (6.1%) | 30 (46.2%) |
*Seven patients (41.2%) previously had pulmonary tuberculosis, 3 (17.6%) previously had pneumoconiosis, 1 (5.9%) previously had pulmonary fibrosis, and 6 (35.5%) had no previous lung disease.
