Table 1.
Final diagnosis of pneumothorax (reference standard).
| Final Diagnosis * | Initial CXR | Signs/Symptoms | Repeat CXR |
|---|---|---|---|
| No PTX | Negative | Negative | N/A |
| No PTX | Negative | Positive | Negative |
| No PTX | Positive | Negative | Negative |
| No PTX | Inconclusive | Positive/negative | Negative |
| PTX | Negative | Positive | Positive |
| PTX | Positive | Positive | N/A |
| PTX | Inconclusive | Positive/negative | Positive |
* Reference standard for the purpose of the study. CXR, chest X-ray; PTX, pneumothorax; negative, absent CXR findings or signs/symptoms of PTX; positive, positive CXR findings or signs/symptoms of PTX; N/A, not applicable.