Table 3.
Baseline Clinical Characteristics in the URS Cohort, Overall and by First Year Retreatment Status
| Variables | Overall | Overall Retreatment in 365 Days | ||||
|---|---|---|---|---|---|---|
| No | Yes | |||||
| N | % | N | % | N | % | |
| All | 119,800 | 100% | 92,398 | 100% | 27,402 | 100% |
| Location of Stone | ||||||
| Both kidney and ureter | 62,457 | 52.1% | 46,926 | 50.8% | 15,531 | 56.7% |
| Kidney | 13,147 | 11.0% | 9598 | 10.4% | 3549 | 13.0% |
| Ureter | 44,196 | 36.9% | 35,874 | 38.8% | 8322 | 30.4% |
| Place of Service | ||||||
| Ambulatory Surgical Center | 18,605 | 15.5% | 15,272 | 16.5% | 3333 | 12.2% |
| Inpatient hospital | 17,589 | 14.7% | 11,196 | 12.1% | 6393 | 23.3% |
| Outpatient hospital | 83,606 | 69.8% | 65,930 | 71.4% | 17,676 | 64.5% |
| Presence of Individual Elixhauser Conditions | ||||||
| Congestive heart failure | 2020 | 1.7% | 1428 | 1.5% | 592 | 2.2% |
| Cardiac arrhythmias | 9432 | 7.9% | 7183 | 7.8% | 2249 | 8.2% |
| Valvular disease | 3683 | 3.1% | 2758 | 3.0% | 925 | 3.4% |
| Pulmonary circulation disorders | 1026 | 0.9% | 739 | 0.8% | 287 | 1.0% |
| Peripheral vascular disorders | 3008 | 2.5% | 2248 | 2.4% | 760 | 2.8% |
| Hypertension, uncomplicated | 44,863 | 37.4% | 33,413 | 36.2% | 11,450 | 41.8% |
| Hypertension, complicated | 3091 | 2.6% | 2144 | 2.3% | 947 | 3.5% |
| Paralysis | 516 | 0.4% | 363 | 0.4% | 153 | 0.6% |
| Other neurological disorders | 2568 | 2.1% | 1901 | 2.1% | 667 | 2.4% |
| Chronic pulmonary disease | 13,048 | 10.9% | 9882 | 10.7% | 3166 | 11.6% |
| Diabetes, uncomplicated | 19,388 | 16.2% | 14,182 | 15.3% | 5206 | 19.0% |
| Diabetes, complicated | 5906 | 4.9% | 4184 | 4.5% | 1722 | 6.3% |
| Hypothyroidism | 11,585 | 9.7% | 8715 | 9.4% | 2870 | 10.5% |
| Renal failure | 3580 | 3.0% | 2489 | 2.7% | 1091 | 4.0% |
| Liver disease | 10,319 | 8.6% | 7961 | 8.6% | 2358 | 8.6% |
| Peptic ulcer disease excluding bleeding | 762 | 0.6% | 555 | 0.6% | 207 | 0.8% |
| AIDS/HIV | 243 | 0.2% | 173 | 0.2% | 70 | 0.3% |
| Lymphoma | 476 | 0.4% | 339 | 0.4% | 137 | 0.5% |
| Metastatic cancer | 529 | 0.4% | 409 | 0.4% | 120 | 0.4% |
| Solid tumor without metastasis | 4078 | 3.4% | 3106 | 3.4% | 972 | 3.5% |
| Rheumatoid arthritis / collagen vascular diseases | 4296 | 3.6% | 3212 | 3.5% | 1084 | 4.0% |
| Coagulopathy | 2098 | 1.8% | 1571 | 1.7% | 527 | 1.9% |
| Obesity | 16,200 | 13.5% | 11,966 | 13.0% | 4234 | 15.5% |
| Weight loss | 1673 | 1.4% | 1259 | 1.4% | 414 | 1.5% |
| Fluid and electrolyte disorders | 7959 | 6.6% | 6011 | 6.5% | 1948 | 7.1% |
| Blood loss anemia | 595 | 0.5% | 435 | 0.5% | 160 | 0.6% |
| Deficiency anemia | 3752 | 3.1% | 2710 | 2.9% | 1042 | 3.8% |
| Alcohol abuse | 805 | 0.7% | 620 | 0.7% | 185 | 0.7% |
| Drug abuse | 1288 | 1.1% | 978 | 1.1% | 310 | 1.1% |
| Psychoses | 491 | 0.4% | 375 | 0.4% | 116 | 0.4% |
| Depression | 15,381 | 12.8% | 11,689 | 12.7% | 3692 | 13.5% |
Abbreviations: AIDS/HIV, acquired immunodeficiency syndrome/human immunodeficiency virus; N, number; URS, ureteroscopy.