Table 3 Comparison of clinical characteristics of patients with tumor at superior or inferior pole and anterior or posterior face of kidney

RENAL nephrometry score

6.2 vs. 6.1, p = 0.385

6.8 vs. 6.9, p = 0.347

PADUA nephrometry score

8.1 vs. 7.9, p = 0.145

8.7 vs. 8.7, p = 0.804

Surgical time (min)

126.6 vs. 123.6, p = 0.419

123.0 vs. 125.1, p = 0.562

Warm ischemia time (min)

18.9 vs. 19.8, p = 0.191

18.8 vs. 19.9, p = 0.111

Estimated blood loss (ml)

73.0 vs. 66.5, p = 0.262

71.5 vs. 63.5, p = 0.412

Complication (Clavien Dindo classification)

Grade 1 (%)

9.5 vs. 9.9, p = 0.727

9.6 vs. 9.6, p = 0.904

≥Grade 2 (%)

3.3 vs. 2.8, p = 0.325

3.1 vs. 3.2, p = 0.937

Changes of eGFR (%)

16.4 vs. 14.4, p = 0.077

14.4 vs. 13.3, p = 0.462

Drainage tube removal time (days)

3.3 vs. 3.2, p = 0.627

3.2 vs. 3.4, p = 0.215

Catheter removal time (days)

2.4 vs. 2.5, p = 0.760

2.5 vs. 2.4, p = 0.790

Postoperative feeding time (days)

2.2 vs. 2.2, p = 0.932

2.2 vs. 2.1, p = 0.110

Postoperative hospital stay (days)

5.4 vs. 5.3, p = 0.978

5.6 vs. 5.4, p = 0.467