Table 1.
Patient baseline characteristics
| Number of patients | n=2183 |
|---|---|
| Age, median (IQR) | 48 (36–59) |
| Male (%) | 1463 (67.0) |
| BMI, median (IQR) | 25 (23–28) |
| Diabetes mellitus, n (%) | 377 (17.3) |
| High blood pressure, n (%) | 466 (21.3) |
| Presentation, n (%)# | |
| Hematuria only | 51 (2.3) |
| Pain only | 1586 (72.7) |
| Hematuria and pain | 338 (15.5) |
| Fever | 218 (10.0) |
| Urine culture positive | 223 (10.2) |
| Indications for intervention, n (%) | |
| Recurrent stone former | 741 (33.9) |
| Elevated creatinine | 346 (15.8) |
| Incidental | 177 (8.1) |
| Pain | 1952 (89.4) |
| Clear fragments from past intervention | 163 (7.5) |
| Patient profession needs it | 42 (1.9) |
| Prestented, n (%) | 846 (38.8) |
| Preoperative antibiotics*, n (%) | 1701 (77.9) |
| Preoperative imaging, n (%) | |
| CT, noncontrasted | 1178 (54.0) |
| CT, contrasted | 997 (45.7) |
| Single stone, n (%) | 1188 (54.4) |
| Stone size (mm), median (IQR) | 10.2 (9.0–14.0) |
| Classification (mm), n (%) | |
| Single <15 | 861 (39.4) |
| Single ≥15 | 327 (14.9) |
| Multiple | 995 (45.7) |
| Stone location(s), n (%)# | |
| Upper pole | 533 (26.0) |
| Interpolar | 559 (27.2) |
| Lower pole | 800 (39.0) |
| Pelvis | 943 (46.0) |
| Proximal ureter | 226 (11.0) |
*Any case including those with and without positive cultures, #More than one possible. IQR=Interquartile range, CT=Computed tomography, BMI=Body mass index