Table 5.
Baseline Clinical Characteristics in the PCNL Cohort, Overall and by First Year Retreatment Status
| Variables | Overall | Overall Retreatment in 365 Days | ||||
|---|---|---|---|---|---|---|
| No | Yes | |||||
| N | % | N | % | N | % | |
| All | 5516 | 100% | 3559 | 100% | 1957 | 100% |
| Location of Stone | ||||||
| Both kidney and ureter | 1136 | 20.6% | 747 | 21.0% | 389 | 19.9% |
| Kidney | 4346 | 78.8% | 2791 | 78.4% | 1555 | 79.5% |
| Ureter | 34 | 0.6% | 21 | 0.6% | 13 | 0.7% |
| Place of Service | ||||||
| Ambulatory Surgical Center | 76 | 1.4% | 48 | 1.3% | 28 | 1.4% |
| Inpatient hospital | 1867 | 33.8% | 1269 | 35.7% | 598 | 30.6% |
| Outpatient hospital | 3573 | 64.8% | 2242 | 63.0% | 1331 | 68.0% |
| Presence of Individual Elixhauser Conditions | ||||||
| Congestive heart failure | 138 | 2.5% | 89 | 2.5% | 49 | 2.5% |
| Cardiac arrhythmias | 617 | 11.2% | 401 | 11.3% | 216 | 11.0% |
| Valvular disease | 220 | 4.0% | 143 | 4.0% | 77 | 3.9% |
| Pulmonary circulation disorders | 61 | 1.1% | 45 | 1.3% | 16 | 0.8% |
| Peripheral vascular disorders | 178 | 3.2% | 120 | 3.4% | 58 | 3.0% |
| Hypertension, uncomplicated | 2768 | 50.2% | 1785 | 50.2% | 983 | 50.2% |
| Hypertension, complicated | 259 | 4.7% | 171 | 4.8% | 88 | 4.5% |
| Paralysis | 65 | 1.2% | 44 | 1.2% | 21 | 1.1% |
| Other neurological disorders | 158 | 2.9% | 100 | 2.8% | 58 | 3.0% |
| Chronic pulmonary disease | 647 | 11.7% | 426 | 12.0% | 221 | 11.3% |
| Diabetes, uncomplicated | 1328 | 24.1% | 828 | 23.3% | 500 | 25.5% |
| Diabetes, complicated | 466 | 8.4% | 299 | 8.4% | 167 | 8.5% |
| Hypothyroidism | 652 | 11.8% | 414 | 11.6% | 238 | 12.2% |
| Renal failure | 416 | 7.5% | 247 | 6.9% | 169 | 8.6% |
| Liver disease | 597 | 10.8% | 399 | 11.2% | 198 | 10.1% |
| Peptic ulcer disease excluding bleeding | 49 | 0.9% | 31 | 0.9% | 18 | 0.9% |
| AIDS/HIV | 17 | 0.3% | 16 | 0.4% | 1 | 0.1% |
| Lymphoma | 22 | 0.4% | 15 | 0.4% | 7 | 0.4% |
| Metastatic cancer | 22 | 0.4% | 14 | 0.4% | 8 | 0.4% |
| Solid tumor without metastasis | 247 | 4.5% | 170 | 4.8% | 77 | 3.9% |
| Rheumatoid arthritis / collagen vascular diseases | 211 | 3.8% | 139 | 3.9% | 72 | 3.7% |
| Coagulopathy | 131 | 2.4% | 82 | 2.3% | 49 | 2.5% |
| Obesity | 1065 | 19.3% | 677 | 19.0% | 388 | 19.8% |
| Weight loss | 113 | 2.0% | 73 | 2.1% | 40 | 2.0% |
| Fluid and electrolyte disorders | 545 | 9.9% | 329 | 9.2% | 216 | 11.0% |
| Blood loss anemia | 51 | 0.9% | 35 | 1.0% | 16 | 0.8% |
| Deficiency anemia | 270 | 4.9% | 179 | 5.0% | 91 | 4.6% |
| Alcohol abuse | 47 | 0.9% | 35 | 1.0% | 12 | 0.6% |
| Drug abuse | 66 | 1.2% | 45 | 1.3% | 21 | 1.1% |
| Psychoses | 32 | 0.6% | 20 | 0.6% | 12 | 0.6% |
| Depression | 717 | 13.0% | 467 | 13.1% | 250 | 12.8% |
Abbreviations: AIDS/HIV, acquired immunodeficiency syndrome/human immunodeficiency virus; N, number; PCNL, percutaneous nephrolithotomy.