Table 1.
Baseline patient characteristics
| No. (%) | ||
|---|---|---|
| Pt demographics | ||
| Male | 4,851 (47.2) | |
| Race: | ||
| Caucasian | 6,872 (66.7) | |
| African-American | 712 (6.9) | |
| Hispanic | 2,019 (19.6) | |
| Asian | 269 (2.6) | |
| Other/unknown | 429 (4.2) | |
| Primary insurance provider: | ||
| Public insurance | 5,121 (49.7) | |
| Private insurance | 3,662 (35.6) | |
| Self-pay/uninsured | 1,518 (14.7) | |
| Weekend admission | 2,810 (27.3) | |
| Medical comorbidities* | ||
| Diabetes mellitus, type II | 2,192 (21.3) | |
| Hypertension | 4,285 (41.6) | |
| Congestive heart failure | 448 (4.4) | |
| Coronary artery disease | 1,375 (13.4) | |
| Chronic renal insufficiency | 1,452 (14.1) | |
| Chronic lung disease | 1,224 (11.9) | |
| Presenting diagnoses | ||
| Stone location: | ||
| Kidney | 1,713 (16.6) | |
| Ureter | 8,588 (83.4) | |
| Urinary tract infection | 6,814 (66.2) | |
| Hydronephrosis | 8,215 (79.8) | |
| Sepsis | 336 (3.3) | |
| Acute renal insufficiency | 4,232 (41.1) | |
| Primary intervention | ||
| Urological intervention | 10,175 (98.8) | |
| Interventional radiology intervention | 126 (1.2) |
*
Mean Charlson comorbidity index 1.