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Comparison of intraoperative and postoperative complications between the normal group and the painless group (n, %).
| Groups | Mucosal injury | Bleeding | Perforated | Infection | Aspiration | Total |
|---|---|---|---|---|---|---|
| Normal group | 8 (20.0%) | 2 (5.00%) | 3 (7.50%) | 1 (2.50%) | 2 (5.0%) | 16 (40.0%) |
| Painless group | 3 (7.89%) | 0 (0%) | 1 (2.63%) | 0 (0%) | 1 (2.63%) | 5 (13.15%) |
| χ 2 | 1.464 | 0.462 | 0.212 | 0 | 0 | 5.837 |
| P | 0.226 | 0.497 | 0.645 | 1.000 | 1.000 | 0.016 |
