Table 1.
Patient characteristics stratified by mannitol treatment (n =285)*
| Characteristic | No Mannitol (n =121) | Mannitol (n =164) | P Value |
|---|---|---|---|
| Age at surgery (y) | 60 (51–68) | 60 (51–67) | .9 |
| Preoperative eGFR | 69 (57–81) | 72 (62–84) | 0.046 |
| Male gender | 78 (64) | 109 (66) | .8 |
| Estimated blood loss (mL) (n =284) | 200 (50–300) | 200 (100–350) | .002 |
| Tumor size (cm) (n =284) | 2.9 (1.8–4.3) | 2.7 (2.0–4.2) | .7 |
| Ischemia | 107 (88) | 161 (98) | <.001 |
| Cold perfusion/irrigation (n =285) | 49 (46) | 21 (13) | |
| Clamp time (min) (n =241) | 32 (24–39) | 32 (25–40) | |
| Pathologic high grade (n =188) | 34 (42) | 38 (36) | .4 |
| Pathologic stage (n =259) | .8 | ||
| T1 | 91 (83) | 130 (87) | |
| T2a | 4 (4) | 5 (3) | |
| T2b+ | 14 (13) | 15 (10) | |
| ASA score (n =284) | .005 | ||
| 1 | 12 (10) | 6 (4) | |
| 2 | 44 (36) | 89 (55) | |
| 3 | 63 (52) | 67 (41) | |
| 4 | 2 (2) | 1 (1) | |
| Year of surgery | <.001 | ||
| 2005 | 3 (2) | 27 (16) | |
| 2006 | 5 (4) | 18 (11) | |
| 2007 | 5 (4) | 48 (29) | |
| 2008 | 31 (26) | 25 (15) | |
| 2009 | 50 (41) | 24 (15) | |
| 2010 | 27 (22) | 22 (13) | |
| Total nephrometry score | .051 | ||
| 4–6 (low complexity) | 45 (37) | 68 (41) | |
| 7–9 (moderate complexity) | 59 (49) | 87 (53) | |
| 10–11 (high complexity) | 17 (14) | 9 (5) |
eGFR, estimated glomerular filtration rate; ASA, American of Anesthesiologists.
Data presented as medians, with interquartile ranges in parentheses, or numbers, with percentages in parentheses.
*
Fisher’s exact test or Wilcoxon rank-sum test.