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Table 2 Comparisons of patients' characteristics between first- and second-generation surgeons

From: Perioperative outcomes following robot-assisted partial nephrectomy for renal cell carcinoma according to surgeon generation

Surgeon's experience 1–50   51–100   101–150  
First Second p First Second p First Second p
Number of patients 100 100   98 100   50 81  
Age, yr 60 (51–67) 55 (45–67) 0.141 58 (47–66) 64 (52–70) 0.04 59 (46–67) 59 (46–66) 0.737
BMI, kg/m.2 24.1 (22.6–26.1) 23.2 (21.6–26.6) 0.459 23.9 (21.6–26.9) 23.4821.8–26.39 0.255 23 (21.1–26.8) 24.3 (21.7–26.7) 0.819
Preop eGFR,
ml/min/1.72 m.2
66.3 (58.4–76.1) 68.2 (56.2–80.8) 0.446 70.8 (55.9–78.7) 65.8 (56.4–75.3) 0.503 70.9 (60.1–82.3) 696 (59.1–79.9) 0.38
Tumor size, mm 28 (22–35) 30 (20–41) 0.265 30 (22–38) 28 (18–42) 0.603 30 (21–36) 26 (18–44) 0.486
RENAL-NS    0.0791    0.9809    0.1287
Low (4,5,6) 41 (41) 53 (53)   33 (34) 35 (35)   12 (24) 32 (40)  
Intermediate (7,8,9) 48 (48) 43 (43)   55 (56) 55 (55)   29 (48) 41(51)  
High (10) 11 (11) 4 (4)   10 (10) 10 (10)   9 (18) 8 (10)  
ASA score    0.2190    0.2927    0.9405
1 25 (25) 16 (16)   15 (15) 21 (21)   10 (20) 18 (22)  
2 71 (71) 77 (77)   72 (73) 73 (73)   36 (72) 56 (69)  
3 4 (4) 7 (7)   11 (11) 6 (6)   4 (8) 7 (9)  
  1. Values are presented as number (%) or median (interquartile range)
  2. ASA American Society of Anesthesiologist, BMI body mass index, preop preoperative, NS nephrometry score, eGFR estimated glomerular filtration rate