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Table 1 Demographic and stone characteristic

From: One-stage efficacy of single tract minimally invasive ECIRS in the improved prone frog split-leg position for staghorn stones

Characteristic stmECIRS (n = 45) stmPNL (n = 38) P value
Age (years) 54.64 ± 11.58 55.13 ± 11.22 0.847
Gender 0.426
 Male 31 23  
 Female 14 15  
BMI (kg/m2) 23.84 ± 3.49 22.44 ± 2.96 0.054
Hb (g/L) 137.96 ± 13.61 131.89 ± 21.92 0.144
Scr(umol/L) 74.4 (62.4, 82.9)b 80.1 (68.1, 94.1)b 0.204a
Stone side 0.062
 Left 27 15  
 Right 18 23  
Stone size (mm) 48.7 (41.7, 67.0)b 43.1 (35.5, 67.3)b 0.128a
Mean CT density (HU) 1299.53 ± 282.75 1275.92 ± 345.16 0.733
No. of staghorn calculi 0.368
 Complete 13 32  
 Partial 10 28  
  1. Data are reported as numbers and percentages or as mean ± SD, as appropriate
  2. StmPNL Group: Single tract minimally invasive percutaneous nephroscopy in prone position was performed for the patients in the prone position
  3. StmECIRS Group: Single tract minimally invasive endoscopic combined intrarenal surgery was performed in the improved prone frog split-leg position
  4. BMI: Body mass index; CT: computed tomography; HU: hounsfifield units
  5. aMann–Whitney U test was used when normal distribution was not obeyed
  6. bNon-normally distributed continuous variables were represented by the median (quartile)