Table 4.
Ability of the degree of muscularis involvement to predict the necessity of RR
| MRI signsa | Sensitivity | specificity | PPV | NPV | Accuracy |
|---|---|---|---|---|---|
| Length ≥ 35 mm | 82.4 (14/17) | 66.7 (6/9) | 82.4 (14/17) | 66.7 (6/9) | 76.9 (20/26) |
| Transverse axis ≥ 11 mm | 94.1 (16/17) | 66.7 (6/9) | 84.2 (16/19) | 85.7 (6/7) | 84.6 (22/26) |
| Thickness ≥ 4 mm | 70.6 (12/17) | 88.9 (8/9) | 92.3 (12/13) | 61.5 (8/13) | 76.9 (20/26) |
| Circumference ≥ 3/12 | 94.1 (16/17) | 88.9 (8/9) | 94.1 (16/17) | 88.9 (8/9) | 92.3 (24/26) |
The data in parentheses are the numbers (n/n) used to calculate the percentage
PPV positive predictive value, NPV negative predictive value
a All MRI signs are parameters reflecting the degree of muscularis involvement