Sensitivity and specificity of CT scan reporting malignancy by indication for thoracoscopic investigation
| Indication | Sensitivity (95% CI) | Specificity (95% CI) | PPV (95% CI) | NPV (95% CI) | Total no. |
|---|---|---|---|---|---|
| Unexplained effusion | 69% (62% to 76%) | 78% (72% to 85%) | 80% (74% to 87%) | 66% (59% to 74%) | 326 |
| Effusion in known/previous malignancy | 64% (47% to 82%) | 75% (54% to 96%) | 82% (66% to 98%) | 55% (34% to 75%) | 44 |
| Overall | 68% (62% to 75%) | 78% (72% to 84%) | 80% (75% to 86%) | 65% (58% to 72%) | 370 |
NPV, negative predictive value; PPV, positive predictive value.