• Joshua W Elder, M Kit Delgado, Benjamin I Chung, Elizabeth A Pirrotta, and N Ewen Wang.
• Robert Wood Johnson Clinical Scholars Program, Yale University School of Medicine, New Haven, Connecticut; Department of Internal Medicine, Yale-New Haven Hospital, New Haven, Connecticut; Department of Emergency Medicine, Yale-New Haven Hospital, New Haven, Connecticut.
• J Emerg Med. 2016 Dec 1; 51 (6): 628-635.

BackgroundRenal colic results in > 1 million ED visits per year, yet there exists a gap in understanding how the majority of these visits, namely uncomplicated cases, are managed.ObjectiveWe assessed patient- and hospital-level variation for emergency department (ED) management of uncomplicated kidney stones.MethodsWe identified ED visits from non-elderly adults (aged 19-79 years) with a primary diagnosis indicating renal stone or colic from the 2011 Nationwide Emergency Department Sample. Patients with additional diagnostic codes indicating infection, sepsis, and abdominal aortic aneurysm were excluded. We used sample-weighted logistic regression to determine the association between hospital admission and having a urologic procedure with patient and hospital characteristics.ResultsOf the 1,061,462 ED visits for uncomplicated kidney stones in 2011, 8.0% of visits resulted in admission and 6.3% resulted in an inpatient urologic procedure. Uninsured patients compared to Medicaid insured patients were less likely to be admitted or have an inpatient urologic procedure (odds ratio [OR] = 0.72; 95% confidence interval [CI] 0.65-0.81 and OR = 0.80; 95% CI 0.72-0.87, respectively). Private- and Medicare-insured patients compared to Medicaid-insured patients were more likely to have an inpatient urologic procedure (OR = 1.20; 95% CI 1.11-1.30 and OR = 1.14; 95% CI 1.04-1.25, respectively).ConclusionsFor patients with uncomplicated renal colic, there is variation in the management associated with nonclinical factors, namely insurance. No consensus guidelines exist yet to address when to admit or utilize inpatient urologic procedures.Copyright © 2016 Elsevier Inc. All rights reserved.

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