Table 1.
Efficacy for diagnosing pneumothorax in multiple trauma patients by clinician-performed ultrasonography and radiography
| Parameters | Ultrasonography (%) | Radiography (%) | Comparison | ||
| Value | 95%CI | Value | 95%CI | P | |
| Sensitivity | 86.2 (25/29) | 73.7–98.8 | 27.6 (8/29) | 11.3–43.9 | <0.001 |
| Specificity | 97.2 (103/106) | 94.0–100 | 100 (106/106) | 100–100 | 0.246a |
| Positive predictive value | 89.3 (25/28) | 77.8–100 | 100 (8/8) | 100–100 | 1.0a |
| Negative predictive value | 96.3 (103/107) | 92.7–99.9 | 83.5 (106/127) | 77.0–89.9 | 0.002 |
| False positive ratio | 2.8 (3/106) | 0–6.0 | 0 (0/106) | 0–0 | 0.246a |
| False negative ratio | 13.8 (4/29) | 1.2–26.3 | 72.4 (21/29) | 56.1–88.7 | <0.001 |
| Accuracy | 94.8 (128/135) | 91.1–98.6 | 84.4 (114/135) | 78.3–90.6 | 0.005 |
aFisher's exact test. CI, confidence interval.