Table 3.
Sensitivity, Specificity, PPV, NPV and Accuracy of CT in Colon Malignancies by Affected Site
| Site | Sensitivity | Specificity | PPV | NPV | Accuracy |
|---|---|---|---|---|---|
| Rectum and rectosigmoid | 93.5% (72/77) | 95.3% (408/428) | 78.3% (72/92) | 98.8% (408/413) | 95% (480/505) |
| Sigmoid and descending colon | 87% (60/69) | 98.4% (429/436) | 89.6% (60/67) | 97.9% (429/438) | 96.8% (489/505) |
| Left flexura, transverse colon and right flexura | 96.2% (25/26) | 99.6% (477/479) | 92.6% (25/27) | 99.8% (477/478) | 99.4% (502/505) |
| Ascending colon and cecum | 100% (31/31) | 98.9% (469/474) | 86.1% (31/36) | 100% (469/469) | 99% (500/505) |