Table 1. Patient characteristics and outcomes.
| Characteristics | Total (N=478) | Abnormal POD1 Hgb, Na, or K (N=155) | Normal POD1 Hgb, Na, and K (N=323) |
|---|---|---|---|
| Age at surgery (years) | |||
| Median (Q1, Q3) | 67 (57, 75) | 69 (61, 77) | 67 (56, 74) |
| Sex, n (%) | |||
| Female | 189 (39.5) | 69 (44.5) | 120 (37.2) |
| Male | 289 (60.5) | 86 (55.5) | 203 (62.8) |
| Race, n (%) | |||
| Asian | 6 (1.3) | 2 (1.3) | 4 (1.2) |
| Black/African American | 29 (6.1) | 8 (5.2) | 21 (6.5) |
| White | 432 (90.4) | 141 (91.0) | 291 (90.1) |
| Hispanic or Latino | 4 (0.8) | 1 (0.6) | 3 (0.9) |
| Body mass index (kg/m2) | |||
| Median (Q1, Q3) | 29 (26, 34) | 29 (25, 34) | 30 (26, 34) |
| Charlson comorbidity index, n (%) | |||
| 1 | 10 (2.1) | 3 (1.9) | 7 (2.2) |
| 2 | 50 (10.5) | 8 (5.2) | 42 (13.0) |
| 3 | 59 (12.3) | 15 (9.7) | 44 (13.6) |
| 4 | 104 (21.8) | 32 (20.6) | 72 (22.3) |
| 5 | 107 (22.4) | 39 (25.2) | 68 (21.1) |
| 6 | 73 (15.3) | 23 (14.8) | 50 (15.5) |
| 7 | 43 (9.0) | 20 (12.9) | 23 (7.1) |
| 8 | 22 (4.6) | 10 (6.5) | 12 (3.7) |
| 9 | 6 (1.3) | 2 (1.3) | 4 (1.2) |
| 10 | 4 (0.8) | 3 (1.9) | 1 (0.3) |
| Diabetes, n (%) | |||
| Yes | 112 (23.4) | 43 (27.7) | 69 (21.4) |
| No | 366 (76.6) | 112 (72.3) | 254 (78.6) |
| Hypertension, n (%) | |||
| Yes | 339 (70.9) | 111 (71.6) | 228 (70.6) |
| No | 139 (29.1) | 44 (28.4) | 95 (29.4) |
| Intra-op complications, n (%) | |||
| Yes | 10 (2.1) | 4 (2.6) | 6 (1.9) |
| No | 468 (97.9) | 151 (97.4) | 317 (98.1) |
| Estimated blood loss (mL) | |||
| Median (Q1, Q3) | 300 (100, 300) | 300 (100, 300) | 300 (100, 300) |
| Total operative time (min) | |||
| Median (Q1, Q3) | 144 (122, 185) | 146 (121, 190) | 143 (122, 184) |
| Post-op complication, n (%) | |||
| Yes | 79 (16.5) | 36 (23.2) | 43 (13.3) |
| No | 399 (83.5) | 119 (76.8) | 280 (86.7) |
| Length of stay (days) | |||
| Median (Q1, Q3) | 2 (2, 3) | 2 (2, 3) | 2 (2, 3) |
| Length of stay ≥3 days, n (%) | |||
| Yes | 165 (34.5) | 61 (39.4) | 104 (32.2) |
| No | 313 (65.5) | 94 (60.6) | 219 (67.8) |
| Readmission, n (%) | |||
| Yes | 84 (17.6) | 34 (21.9) | 50 (15.5) |
| No | 394 (82.4) | 121 (78.1) | 273 (84.5) |
| Tumor kidney, n (%) | |||
| Left | 244 (51.0) | 82 (52.9) | 162 (50.2) |
| Right | 234 (49.0) | 73 (47.1) | 161 (49.8) |
| Pathology tumor size (cm) | |||
| Median (Q1, Q3) | 6 (4, 8) | 5 (4, 6) | 6 (4, 8) |
POD1, postoperative day one; Hgb, hemoglobin; Na, sodium; K, potassium.