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Patient data at baseline.
| Wu-ling-san group | Placebo group | P value(t-test) | |
| Men(n) | 12 | 11 | 0.63 |
| Women(n) | 2 | 3 | |
| Mean age (years old) | 44.8 ± 8.7 | 48.8 ± 8.7 | 0.23 |
| Urolithiasis procedure | 2.6 ± 0.5 | 2.4 ± 0.5 | 0.690 |
| Stone severity index | 3.8 ± 1.1 | 3.4 ± 0.5 | 0.421 |
| BMI (kg/m2) | 26.3 ± 3.0 | 26.2 ± 3.0 | 1.000 |
