Table 1.
Demographic and clinical characteristics of patients who underwent laparoscopic pyelolithotomy.
| Variable | Whole series | Group1 (2009–2012) | Group2 (2013–2016) | Group3 (2017–2020) | P-value |
|---|---|---|---|---|---|
| Numbers | 436 | 92 | 140 | 204 | |
| Age, years; Mean ± SD | 46.0 ± 15.4 | 47.1 ± 15.9 | 46.8 ± 15.9 | 45.5 ± 14.9 | 0.69 |
| Gender, N; M/F | 321/115 | 71/21 | 98/42 | 152/52 | 0.44 |
| Side of LPL, N; L/R | 230/206 | 54/38 | 74/66 | 102/102 | 0.38 |
| Renal anatomy, N; Normal/Abnormal | 368/68 | 86/6 | 123/17 | 159/45 | 0.001 |
| Stone location, N; Single calyx/Single pelvis / Multiple or staghorn | 32/271/133 | 4/43/45 | 15/78/47 | 13/150/41 | < 0.001 |
| Preoperative Creatinine, mg/dL; Median (IQR) | 1.2 (1.1–1.5) | 1.2 (1.0–1.5) | 1.2 (1.0–1.4) | 1.3 (1.1–1.5) | 0.14 |
| Preoperative Creatinine, N; Cr ≤ 1.5/1.51 < Cr < 3 / Cr ≥ 3 | 345/81/10 | 69/19/4 | 115/23/2 | 161/39/4 | 0.55 |
| Preoperative Hb, mg/dL; Mean ± SD | 13.9 ± 2.0 | 13.6 ± 2.0 | 13.9 ± 2.0 | 14.1 ± 2.0 | 0.24 |
| Stone size, mm; Median (IQR) | 30 (23–40) | 30 (25–40) | 30 (23–40) | 30 (23–35) | 0.09 |
| Positive Hx of previous operation; N (%) | 76 (17) | 24 (26) | 33 (24) | 19 (9) | < 0.001 |
Significant values are in bold.
N number, M male, F female, L left, R right, Hb hemoglobin, Hx history, SD standard deviation.