Table 1.
Comparison between the recurrence group and the nonrecurrence group
| Recurrent group (n = 48) | Nonrecurrent group (n = 48) | p value | |
|---|---|---|---|
| Median Age (range) | 61.5 (19ཞ79) | 70.5 (40ཞ90) | 0.00243 |
| Sex : Male/Female (n) | 35/13 | 27/21 | 0.135 |
| Previous stone episodes before surgery (n) | 26 | 20 | 0.307 |
| The number of stones at surgery: Single/Multiple (n) | 17/31 | 25/23 | 0.149 |
| Residual fragment * at the primary evaluation (n) | 18 | 16 | 0.831 |
| Median BMI at surgery | 23 (14ཞ41) | 23 (15ཞ43) | 0.808 |
| Median WA at the primary evaluation (range, mm2) | 50,452 (31999ཞ96356) | 53,144 (29225ཞ106925) | 0.47 |
| Median WA at the secondary evaluation (range, mm2) | 50,374 (29311ཞ106329) | 56789.5 (23427ཞ110072) | 0.481 |
| Median change of WA (range, ±mm2) | + 849.5 (−34113ཞ+13098) | + 2013.5 (−12625ཞ+17719) | 0.0858 |
| Median change of WA per year (range, ±mm2/year) | + 278.5 (−13645ཞ+4793) | + 784.5 (−6313ཞ+13207) | 0.0743 |
WA Waist area, BMI Body Mass Index
*Diameter longer than 2 mm on CT images