Table 1 Baseline characteristics of enrolled patients.
|  | Training and validation dataset (n = 573) | Test dataset (n = 191) |
|---|---|---|
Age of patients | 50.4 ± 14.4 | 48.83 ± 14.29 |
Male sex (%) | 573 (100) | 156 (81.7) |
Number of stones | ||
 1 | 291 (50.8) | 105(34.9) |
 2 | 118 (20.6) | 60(19.9) |
 3 | 52 (9.1) | 22(7.3) |
 4 | 40 (7.0) | 4(1.3) |
 ≥ 5 | 72 (12.5) | 0 |
Size of the largest stone | ||
 < 4 mm | 57 (9.9) | 95(49.7) |
 ≥ 4 mm, < 10 mm | 222 (38.8) | 73(38.2) |
 ≥ 10 mm | 294 (51.3) | 3(1.6) |
Location of the largest stone | ||
 Right side | 275 (48.0) | 148(49.2) |
 Kidney | 93 (16.2) | 144(47.8) |
 Proximal ureter | 252 (44.0) | 82(27.2) |
 Middle ureter | 66 (11.5) | 15(5.0) |
 Distal ureter | 129 (22.5) | 57(18.9) |
 Urinary bladder | 33 (5.8) | 3(1.0) |
