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Table 2 Renal stone characteristics and their ESWL outcomes

From: Fragmentation and propulsive effect of shock wave lithotripsy in treatment of small renal calculi

Stones (n = 58) Outcome P value
Stone free No change
No % No %
Side of stone
 Right 26 89.7 3 10.3 0.028*
 Left 19 65.5 10 34.5  
Site of stone
 Calyx 41 77.4 22.6 12 0.892
 Pelvis 4 80.0 1 20.0  
Site of calyx stone (n = 53)
 Upper Calyx 6 100 0.232
 Mid calyx 21 70.0 9 30.0  
 Lower calyx 14 82.4 3 17.6  
Dilated PCS
 Yes 4 80.0 1 22.6 0.892
 No 41 77.4 12 22.6  
Lucent or Opaque
 Lucent 17 73.9 6 26.1 0.587
 Opaque 28 80.0 7 20.0  
 Stone size (mm)
 6 4 100 0.440
 7 15 71.4 6 28.6  
 8 26 78.8 7 21.2