Table 1.
Preoperative and pathologic characteristics of patients
| Operation Type | All Preoperative eGFR |
Preoperative eGFR >60 mL/min/1.73 m2 |
Preoperative eGFR >45 mL/min/1.73 m2 |
||||||
|---|---|---|---|---|---|---|---|---|---|
| Radical (n = 403) |
Partial (n = 1707) |
P Value | Radical (n = 284) |
Partial (n = 1184) |
P Value | Radical (n = 365) |
Partial (n = 1582) |
P Value | |
| Age at surgery (years) | 65 (56, 71) | 60 (52, 69) | <.0001 | 62 (54, 69) | 57 (48, 64) | <.0001 | 64 (56, 71) | 59 (51, 67) | <.0001 |
| Preoperative creatinine (μmol/L) | 100 (90, 120) | 110 (90, 120) | .092 | 100 (80, 110) | 100 (90, 110) | .018 | 100 (90, 110) | 110 (90, 120) | .009 |
| Preoperative eGFR (mL/min/1.73 m2) | 68 (56, 81) | 69 (57, 83) | .5 | 76 (67, 87) | 76 (68, 89) | .2 | 70 (61, 83) | 71 (60, 84) | 1 |
| ASA score of 3 or 4 | 137 (34%) | 729 (43%) | .001 | 79 (28%) | 447 (38%) | .002 | 114 (31%) | 640 (40%) | .001 |
| Black | 20 (5.0%) | 80 (4.7%) | .8 | 12 (4.2%) | 60 (5.1%) | .6 | 18 (4.9%) | 76 (4.9%) | .9 |
| Male gender | 237 (59%) | 1050 (62%) | .3 | 167 (59%) | 753 (64%) | .13 | 215 (59%) | 982 (62%) | .3 |
| Hypertension | 222 (55%) | 877 (51%) | .2 | 143 (50%) | 524 (44%) | .073 | 194 (53%) | 775 (49%) | .2 |
| Diabetes | 53 (13%) | 228 (13%) | 1 | 38 (13%) | 137 (12%) | .4 | 48 (13%) | 198 (13%) | .7 |
| Tumor size (cm) | 3.0 (2.5, 3.5) | 2.5 (1.8, 3.1) | <.0001 | 3.0 (2.5, 3.6) | 2.5 (1.8, 3.2) | <.0001 | 3.0 (2.5, 3.5) | 2.5 (1.8, 3.1) | <.0001 |
| Histology (post surgery) | |||||||||
| Conventional clear cell | 241 (60%) | 909 (53%) | .11 | 176 (62%) | 656 (55%) | .3 | 219 (60%) | 850 (54%) | .2 |
| Papillary | 51 (13%) | 246 (14%) | 34 (12%) | 155 (13%) | 47 (13%) | 218 (14%) | |||
| Chromophobe | 27 (6.7%) | 153 (9.0%) | 21 (7.4%) | 107 (9.0%) | 26 (7.1%) | 144 (9.1%) | |||
| Other | 84 (21%) | 399 (23%) | 53 (19%) | 266 (22%) | 73 (20%) | 370 (23%) | |||
| Huang et al cohort9 | 222 (55%) | 351 (21%) | <.0001 | 181 (64%) | 272 (23%) | <.0001 | 214 (59%) | 348 (22%) | <.0001 |
ASA, American Society of Anesthesiologists; eGFR, estimated glomerular filtration rate.
Estimates are given as median (interquartile range) or frequency (percentage). P values were calculated using the Wilcoxon rank sum test for continuous variables and Fisher's exact test for categorical variables.