Table 4 Comparative study between endoanal ultrasound and MRI in detection of secondary extensions
|  | Secondary extensions (MRI) | Cohen’s kappa coefficient | P value | |||
|---|---|---|---|---|---|---|
Yes | No | |||||
Count | % | Count | % | |||
Secondary extension (endoanal ultrasound) | ||||||
Yes | 4 | 50.0 | 0 | 0.0 | 0.651 | < 0.001 |
 No | 4 | 50.0 | 112 | 100.0 |  |  |