Table 1.

Patient characteristics by preoperative eGFR

VariableOverall
(n=572)Preoperative eGFRP Value
≥60 ml/min per 1.73 m2
(n=363 [63%])<60 ml/min per 1.73 m2
(n=209 [37%])
Median age at surgery, yr61.5 (25.1, 91.6)57.5 (25.1, 91.6)68.2 (28.3, 87.9)<0.001
Median BMI, kg/m2a 28.7 (15.5, 69.7)28.4 (18.9, 69.7)29.0 (15.5, 51.0)0.36
Sex0.06
 Female185 (32.3)107 (29.5)78 (37.3)
 Male387 (67.7)256 (70.5)131 (62.7)
Race0.10
 Other66 (11.5)48 (13.2)18 (8.6)
 White506 (88.5)315 (86.8)191 (91.4)
Diabetes96 (16.8)51 (14)45 (21.5)0.03
Hypertension357 (62.4)205 (56.5)152 (72.7)<0.001
Coronary artery disease62 (10.8)30 (8.3)32 (15.3)0.01
Smokingb0.73
 Never281 (49.1)180 (49.6)101 (48.3)
 Ever289 (50.5)181 (49.9)108 (51.7)
 NA2 (0.3)2 (0.6)0 (0)
ASA grade0.03
 1, 2236 (41.3)162 (44.6)74 (35.4)
 3, 5336 (58.7)201 (55.4)135 (64.6)
Median tumor size, cmc7.7 (0.4, 32)8 (1.3, 32)7.2 (0.4, 23)0.01
T stage0.01d
 Tx, T010 (1.7)7 (1.9)3 (1.4)
 T1111 (19.4)63 (17.4)48 (23)
 T271 (12.4)57 (15.7)14 (6.7)
 T3, T4380 (66.4)236 (65)144 (68.9)
Type of surgery0.43
 Laparoscopic/robotic104 (18.2)70 (19.3)34 (16.3)
 Open468 (81.8)293 (80.7)175 (83.7)
  • Median values are expressed with minimum, maximum values in parentheses. All other values are expressed as number (percentage). BMI, body mass index; NA, not available; ASA, American Society of Anesthesiologists.

  • a BMI value missing for one patient.

  • b Smoking values missing for two patients.

  • c Tumor size value missing for one patient.

  • d P value from chi-squared test comparing Tx, T0, T1 versus T2 versus T3, T4.