Table 1 Basic characteristic of study groups that underwent PCNL in the modified supine position
Variable | PCN (N = 53) | KMP (n = 98) | P value |
|---|---|---|---|
Age (year) | 58.25 ± 14.54 | 59.12 ± 13.37 | 0.71 |
Gender | Â | Â | 0.939 |
 Male | 37 (69.8) | 69 (70.4) |  |
 Female | 16 (30.2) | 29 (29.6) |  |
BMI | 25.2 ± 3.20 | 25.34 ± 3.35 | 0.814 |
Laterality | Â | Â | 0.707 |
 Right | 18 (34.0) | 36 (36.7) |  |
 Left | 35 (66.0) | 62 (63.3) |  |
Renal stone type | Â | Â | 0.012 |
 Complete staghorn | 4 (7.5) | 18 (18.4) |  |
 Partial staghorn | 19 (35.8) | 48 (49.0) |  |
 Others | 30 (56.6) | 32 (32.7) |  |
Renal stone size (mm) | 23.59 ± 9.53 | 26.85 ± 11.35 | 0.063 |
Caliectasis | 33 (62.3) | 50 (51.0) | 0.185 |
Parenchymal thinning | 16 (30.2) | 32 (32.7) | 0.756 |
Multiplicity of renal stone | Â | Â | 0.025 |
 Single | 17 (32.1) | 50 (51.0) |  |
 Multiple | 36 (67.9) | 48 (49.0) |  |
Tract size | Â | Â | 0.11 |
 30 Fr | 41 (77.4) | 28 (28.6) |  |
 24 Fr | 0 (0) | 6 (6.1) |  |
 18 Fr | 12 (22.6) | 64 (65.3) |  |
Puncture site | Â | Â | 0.04 |
 Upper calyx | 1 (1.9) | 5 (5.1) |  |
 Middle calyx | 7 (13.2) | 3 (3.1) |  |
 Lower calyx | 45 (84.9) | 90 (91.8) |  |