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Comparison of stone clearance rates in patients at 5 d and 1 month postoperatively
| Group | 5 d stone removal rate | 1 month stone clearance rate |
|---|---|---|
| Control group (n=95) | 71 | 90 |
| Observation group (n=109) | 99 | 104 |
| χ2-value | 9.460 | 0.049 |
| P-value | 0.002 | 0.823 |
