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Proportion of positive patients to 3D-EAUS and MRI in the diagnosis of primary tract of anal fistulas, secondary extensions, and abscess and χ 2 test with Yates correction.
| MRI % | 3D-EAUS % | Hypothesis | χ 2 test (p value) | |
|---|---|---|---|---|
| Primary tract | 58.82 (30) | 52.94 (27) | MRI > 3D-EAUS | 0.55 |
| Secondary extension | 86.27 (44) | 80.39 (41) | MRI > 3D-EAUS | 0.42 |
| Abscess | 15.69 (8) | 5.88 (3) | MRI > 3D-EAUS | 0.11 |
