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Table 2 Success rate after RIRS according to the T.O.HO. score

From: External validation of the T.O.HO. score as predictor of success after retrograde intrarenal surgery

T.O.HO. score Success rate, % (n)
3 98.2% (55/56)
4 91.7% (11/12)
5 91.5% (86/94)
6 87.2% (95/109)
7 73.6% (114/155)
8 57.9% (55/95)
9 32.8% (19/58)
10 27.3% (6/22)
11 20% (2/10)
Total 72.5% (443/611)
  p < 0.001c
  1. Bold p value ​​indicates statistical significance
  2. RIRS Retrograd Intrarenal Surgery, T.O.HO. (T)allness, (O)ccupied Lession Status, (HO)undsfield Unit Evaluation, c Chi-square test