Table 3. Pre-Operative characteristics of patients with multiple renal stones according to absence/presence of lower pole stone.
| Lower calyceal stone present | No lower calyceal stone | P value | ||
|---|---|---|---|---|
| Number | 92 | 19 | ||
| Mean age (years) | 45.8±13.9 | 46.6±14 | 0.803 | |
| Mean body mass index (kg/m2) | 26.7±5.5 | 24.3±2.4 | 0.075 | |
| Mean stone area(mm2) | 156.4±60 | 153.3±63.1 | 0.839 | |
| Gender | 0.086 | |||
| Male | 26.3% | 73.7% | ||
| Female | 47.8% | 52.2% | ||
| Operation side | 0.211 | |||
| Left | 54.3% | 31.6% | ||
| Right | 45.7% | 68.4% | ||
| Stone localisation | <0.001 | |||
| Multiple stones with lower pole stone | 92 | 0 | ||
| Multiple stones without lower pole stone | 0 | 19 | ||
| Hydronephrosis | 0.218 | |||
| 0 | 23 | 5 | ||
| 1 | 36 | 5 | ||
| 2 | 28 | 7 | ||
| 3 | 5 | 1 | ||
| 4 | 0 | 1 | ||
| Solitary Kidney | 5.4% | 0% | 0.298 | |
| Stone opacity | 0.352 | |||
| Opaque | 87 | 19 | ||
| Non opaque | 5 | 0 | ||
| Previous SWL history | 54.3% | 47.4% | ||
SWL = Shock Wave Lithotripsy