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Comparison of cases within and after one year between untreated and treated group
| Groups | Cases within one year [n (%)] | Cases after one year [n (%)] | Total | P* |
| *, Continuity correction χ2 test was used for the comparison. SD/CIS patients were divided into two groups by whether they received endoscopic treatments | ||||
| Untreated Group | 2 (2.5) | 78 (97.5) | 80 | 0.467 |
| Treated Group | 6 (5.8) | 97 (94.2) | 103 | |
| Total | 8 | 175 | 183 | |
