Table 2 Sensitivity for detecting occult pneumothorax of oblique chest radiograph vs. lung ultrasonography viewed in terms of size of occult pneumothorax
|  | Occult pneumothorax size (n = 70) | ||
|---|---|---|---|
| Â | Minuscule | Anterior | Anterolateral |
n = 19 | n = 32 | n = 19 | |
Oblique X-ray sensitivity (%) | 15.8 | 68.8 | 94.7 |
Lung US sensitivity (%) | 10.5 | 75.0 | 94.7 |
p | 0.63 | 0.59 | 1.0 |
Need for chest tube (%) | 10.5 | 40.6 | 89.5 |