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Table 1 Patient and stone demographics

From: Application of a new position in endoscopic combined intrarenal surgery: modified prone split-leg position

Characteristic Value
Characteristics of patients and stone features, mean ± SD  
Age (years) 55.4 ± 10.5
N (male:female) 51/45
BMI (kg/m2) 24.3 ± 3.1
Hb (g/dL) 12.7 ± 1.9
Hct (%) 38.6 ± 5.3
Side (right:left) 54/42
ASA status, n (%)  
 ASA I 44 (45.8)
 ASA II 45 (46.9)
 ASA III 7 (7.3)
Multiple renal calculi, n (%) 61 (63.5)
Multiple renal calculi with ipsilateral ureteral calculi, n (%) 35 (36.5)
Renal stone size (mm) 32.5 ± 10.7
Renal stone surface area (mm2) 712.2 ± 264.8
Number of calyces involved by stone, n (%)  
 < 3 42 (43.8)
 ≥ 3 54 (56.2)
CT (HU) 1055.9 ± 301.1
Ureteric stone size (mm) 24.8 ± 12.3
Ureteric stone number 3.2 ± 1.2
Preoperative history, n  
 SWL 12
 URS 9
 PCNL 14
Operative parameters, mean ± SD  
Surgical time (min) 82.2 ± 38.3
Hb drop (g/dL) 0.9 ± 0.5
Hct drop (%) 2.7 ± 1.1
Postoperative hospital stay (d) 6.5 ± 1.3
Stone free, n (%) 75(78.1)
Ancillary treatment  
 Total 11
 Second PCNL 2
 SWL 6
 FURSL 3
Intra and postoperative complications according to the  
modified Clavien classification  
 Clavien grade 0, n (%) 80 (83.3)
 Clavien grade I, n (%) 14 (14.6)
  Transient fever > 38.5℃ 9 (9.4)
  Hemorrhage, non transfusion 5 (5.2)
 Clavien grade II, n (%) 2 (2.1)
  Blood transfusion 2 (2.1)
 Clavien grade ≥ III, n (%) 0 (0)
  1. Hb hemoglobin, Hct Hematocrit, BMI body mass index, ASA American Society of Anesthesiologists, CT computed tomography, HU hounsfield unit, SWL shock wave lithotripsy, PCNL Percutaneous nephrolithotomy, FURSL flexible ureteroscope