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Table 2 The impact of kidney related factors and stone facts on urinary leakage

From: Stones hounsfield unit value and predictors of urinary leakage after PCNL

  Urinary leakage P value
Absent (n = 237) Present (n = 159)
Stone surface area (mm2) 226.19 (64–1176) 282.74 (106–1374) 0
Stone burden (mm3) 1558.2 (265–14,951) 2076.21 (623–17,565) 0.003
Stone localization
 Pelvic 142 (70.2%) 60 (29.8%) 0
 Isolated caliceal 54 (51.4%) 51 (48.6%)  
 Multiple + staghorn 41 (46%) 48 (54%)  
 Paranchymal thickness (mm) 13 (9–18) 10 (7–16) 0
 Hounsfield unit 855.98 ± 239.55 1215.87 ± 320.01 0
Hydronephrosis grade
 0 126 (77.7%) 36 (22.3%) 0
 1 75 (59.5%) 51 (40.5%)  
 2 27 (36%) 48 (64%)  
 3 9 (27.2%) 24 (72.8%)  
Previous stone treatment history
 No 93 (72%) 36 (28%) 0.001
 ESWL 63 (65.6%) 33 (34.4%)  
 PCNL 60 (48.7%) 63 (51.3%)  
 Open surgery 21 (43.7%) 27 (56.3%)