Postoperative UTI Postoperative UTI p Yes (n=20) No (n=269) Age (years) Ave 47.8± 12.6 47.9± 14.7 0,988‡ Sex Male Female 9 (%45) 11 (%55) 162 (%60.2) 107 (%39.8) 0.181† BMI Med 26.3± 3.2 27.4± 4.7 0.436§ DM Yes No 3 (%15) 17 (%85) 57 (%21.1) 212 (%78.9) 0.510† HT Yes No 4 (%20) 16 (%80) 69 (%25.6) 200 (%74.4) 0.575† Charlson Comorbidity İndex 0-1 ≥2 14 (%70) 6 (%30) 202 (%77.9) 57 (%22.1) 0.410† Stone Diameter(mm) Med 13.5± 4.1 15± 3.6 0.285§ Stone Localisation Upper Calyx Middle Calyx Lower Calyx Renal Pelvis Proximal Ureter Multipl 3 (%15) 2 (%10) 4 (%20) 8 (%40) 0 (%0) 3 (%15) 9 (%3.3) 29 (%10.8) 90 (%33.4) 72 (%26.8) 12 (%4.5) 67 (%24.9) 0.090† Preoperative Hydronephrosis Yes No 8 (%40) 12 (%60) 140 (%52.1) 128 (%47.9) 0.550† UTI History Yes No 11 (%55) 9 (%45) 55 (%20.5) 214 (%79.5) 0.000† Preoperative Dj Stent Yes No 8 (%40) 12 (%60) 63 (%23.4) 206 (%76.6) 0.097† Access Sheat Use Yes No 10 (%50) 10 (%50) 157 (%58.4) 112 (%41.6) 0.465† Operation time (min) Med 62.5± 16.6 60± 19.4 0.008§ Residual fragment Yes No 3 (%30) 17 (%70) 93 (%34.6) 176 (%65.4) 0.073†