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Table 2 Stone and CT characters

From: Management of upper calyceal stone by percutaneous nephrolithotomy through lower calyx access: prone versus supine position

 

Prone PCNL

N = 18

Supine PCNL

N = 20

P value

Stone side, no (%)

 Right

11 (61.1)

10 (50.0)

0.49

 Left

7 (38.9)

10 (50.0)

 

Stone size (mm)

20.3 ± 2.07

20.3 ± 1.7

0.9

Skin-to-stone distance (mm)

94.0 ± 16.22

91.7 ± 25.23

0.74

Body wall thickness (mm)

62.11 ± 12.99

59.75 ± 12.39

0.56

Angle between upper and lower calyceal accesses

89.67 ± 14.56

130.2 ± 23.46

0.001**

  1. Unless otherwise indicated, data represent the mean ± SD
  2. N number, SD standard deviation
  3. **High significant difference