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Pre- and postoperative three-dimensional endoanal ultrasound measurements of sphincter involvement and division, respectively
| IAS | EAS | |||
|---|---|---|---|---|
| Median % (range) | Median mm (range) | Median % (range) | Median mm. (range) | |
| Preoperative | 31 (0–66) | 9 (0–24) | 41.2 (0–89) | 10 (0–28) |
| Postoperative | 32,4 (0–75) | 8 (0–25) | 41.7 (0–100) | 11 (0–29) |
IAS internal anal sphincter; EAS external anal sphincter p > 0.05
