Table 1.
Demographics and Surgical Outcomes with Respect to Stone Distribution Within the Kidney
| Location of involved stone(s) | Renal pelvis (n=30) | Renal calyx (n=10) | Pelvis and one calyx (n=28) | Pelvis and multiple calices (n=9) | p-Value |
|---|---|---|---|---|---|
| Patient characteristics | |||||
| Mean age (years) | 55.2±15.8 (31–81) | 56.4±17.5 (27–82) | 55.6±13.7 (24–74) | 54.0±13.5 (34–69) | 0.989 |
| Gender (M:F) | 25:5 | 8:2 | 20:8 | 8:1 | 0.631 |
| Mean BMI (kg/m2) | 26.3±3.1 (20.8–35.2) | 27.0±3.0 (21.6–31.5) | 24.9±3.7 (17.1–30.9) | 24.1±3.9 (19.8–31.4) | 0.172 |
| Stone characteristics | |||||
| Laterality (right:left) | 11:19 | 4:6 | 13:15 | 5:4 | 0.755 |
| Mean stone number (n) | 1.1±0.4 (1–3) | 2.0±1.7 (1–6) | 3.1±1.1 (2–5) | 8.8±8.3 (3–25) | <0.001 |
| Stone size (mm) | 20.7±7.4 (15–47) | 25.2±13.0 (15–58) | 41.1±18.4 (20–86) | 86.2±42.3 (38–148) | <0.001 |
| Surgical outcomes | |||||
| Stone-free rate (%) | 96.7 (29/30) | 90.0 (9/10) | 78.6 (22/28) | 33.3 (3/9) | <0.001 |
| Mean operation time (min) | 128.3±48.0 (42–240) | 145.8±97.2 (55–314) | 156.4±76.3 (30–300) | 176.3±66.4 (85–290) | 0.214 |
| Mean estimated blood loss (mL) | 38.0±60.5 (0–300) | 164.0±258.9 (0–880) | 26.1±35.5 (0–100) | 30.6±37.0 (0–100) | 0.020 |
| Mean change in Hb level (g/dL) | −0.82±0.75 (−2.80–0.60) | −1.00±1.48 (−5.10–0.00) | −0.92±0.94 (−3.80–0.00) | −1.09±0.78 (−2.20–0.20) | 0.709 |
| Postoperative analgesic usage (%) | 40.0 (12/30) | 60.0 (6/10) | 39.3 (11/28) | 77.8 (7/9) | 0.153 |
| Mean used analgesics number (n) | 0.7±1.1 (0–3) | 1.4±1.6 (0–5) | 1.2±2.4 (0–10) | 5.1±9.8 (0–31) | 0.079 |
| Mean hospital stay (days) | 3.4±1.9 (1–11) | 4.5±1.5 (3–7) | 4.2±2.0 (2–8) | 6.6±6.37 (3–23) | 0.038 |
| Complementary treatment | |||||
| Surveillance | 1 | 1 | 4 | 4 | |
| SWL | 2 | 2 | |||
BMI=body mass index; SWL=extracorporeal shockwave lithotripsy.