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Comparison of recurrence rate between the two groups (n, %).
| Groups | N (cases) | Recurrence rate at 6 months after treatment | Recurrence rate at 12 months after treatment |
|---|---|---|---|
| Observation | 38 | 1 (2.63) | 2 (5.26) |
| Control | 38 | 5 (13.15) | 13 (34.21) |
| t/χ2 | 1.627 | 8.308 | |
| P-value | 0.202 | 0.003 |
