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Table 1 Comparison between nephrolithotomy (Mini-PCNL) and flexible ureterorenoscopy (RIRS) according to demographic distribution

From: Flexible ureterorenoscopy (RIRS) vs. Mini- percutaneous nephrolithotomy (MINI-PCNL) for renal stones 20–30 mm a prospective randomized study

  mPCNL (35) RIRS (35) Statistical test (× 2) P value
Age (years) mean ± SD 36.11 ± 11.91 34.0 ± 10.69 St t = 0.78 0.44
Sex n(%)
Male 25 (71.4) 17 (48.6) 3.81 0.051
Female 10 (28.6) 18 (51.4)   
BMI (kg/m2)mean ± SD 41.76 ± 9.34 42.21 ± 10.22 St t = 0.20 0.85