Table 2.
Comparisons of surgical outcomes and postoperative clinical characteristics between two groups.
| Variables, mean ± SD or n (%) | V-UAS group (n = 86) | MPCNL group (n = 87) | P value |
|---|---|---|---|
| Operative time, min | 61.4 ± 5.2 | 60.3 ± 5.6 | 0.183 |
| WBC, 109/L | |||
| Postoperative 6 h | 14.4 ± 3.1 | 13.6 ± 3.8 | 0.131 |
| Postoperative 24 h | 15.5 ± 3.7 | 16.9 ± 3.0 | 0.007** |
| Postoperative 48 h | 9.3 ± 2.2 | 10.0 ± 1.8 | 0.02* |
| Serum CRP concentration, mg/L | |||
| Postoperative 6 h | 62.5 ± 23.4 | 59.7 ± 12.3 | 0.325 |
| Postoperative 24 h | 67.6 ± 19.1 | 74.6 ± 10.2 | 0.003** |
| Postoperative 48 h | 23.2 ± 11.6 | 26.7 ± 8.6 | 0.025* |
| Serum PCT concentration, ng/ml | |||
| Postoperative 6 h | 0.179 ± 0.042 | 0.174 ± 0.033 | 0.385 |
| Postoperative 24 h | 0.368 ± 0.093 | 0.421 ± 0.147 | 0.005** |
| Postoperative 48 h | 0.095 ± 0.037 | 0.112 ± 0.058 | 0.022* |
| Initial SFS (postoperative 1 day) | |||
| No | 23 (26.8) | 12 (13.8) | – |
| Yes | 63 (73.2) | 75 (86.2) | 0.034* |
| SFS at the 2nd week end | |||
| No | 15 (17.4) | 8 (9.2) | – |
| Yes | 71 (82.6) | 79 (90.8) | 0.110 |
| SFS at the 4nd week end | |||
| No | 5 (5.8) | 4 (4.6) | – |
| Yes | 81 (94.2) | 83 (95.4) | 0.719 |
| Complications | |||
| Fever | 2 (2.4) | 9 (10.3) | 0.031* |
| Bleeding | 1 (1.2) | 3 (3.4) | 0.317 |
| Pain | 2 (2.4) | 13 (14.9) | 0.003** |
| Urosepsis | 0 (0.0) | 4 (4.6) | 0.044* |
| Stone compositions | |||
| Calcium oxalate | 17 (19.8) | 19 (21.8) | 0.737 |
| Calcium phosphate | 12 (14.0) | 15 (17.3) | 0.551 |
| Struvite or carbonated apatite | 53 (61.6) | 51 (58.6) | 0.686 |
| Uric acid or cysteine | 4 (4.6) | 2 (2.3) | 0.398 |
| Postoperative hospital stay, days | 3.7 ± 0.8 | 5.9 ± 0.5 | <0.001** |
SD, standard deviation; WBC, white blood cell; CRP, C-reactive protein; PCT, procalcitonin; SFS, stone-free status.
*
P < 0.05.
**
P < 0.01.