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Comparison of the recurrence rate in patients between the two groups 1 year and 2 years after operation (n, %)
| Groups | Recurrence rate one year after operation | Recurrence rate two years after operation |
|---|---|---|
| Control group (n=30) | 7 (23.33) | 11 (36.67) |
| Observation group (n=30) | 3 (10.00) | 5 (16.67) |
| χ2 | 4.219 | 4.021 |
| P | 0.039 | 0.044 |
