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Risk Factors Associated with Urologic Intervention in Emergency Department Patients with Suspected Renal Colic.
Journal of Emergency Medicine 2015 August
BACKGROUND: Whereas most patients with urolithiasis pass their stones spontaneously and require only symptomatic management, a minority will require urologic intervention.
OBJECTIVE: Our primary objective was to confirm previously reported risk factors and to identify additional predictors of urologic intervention within 90 days, for emergency department (ED) patients with suspected renal colic.
METHODS: We conducted a prospective cohort study of adult patients presenting to one of two tertiary care EDs with suspected renal colic over a 20-month period. Multivariate logistic regression models determined predictor variables independently associated with urologic intervention.
RESULTS: Of the 565 patients included in the analysis, 220 (38.9%) patients had a ureteric stone visualized on diagnostic imaging. Eighty-four patients (14.9%) had urologic intervention within 90 days of their initial ED visit. Urinary nitrites (odds ratio [OR] 4.2, 95% confidence interval [CI] 1.3-13.6), stone size ≥ 5 mm (OR 4.2, 95% CI 2.4-7.4), proximal ureteric stone (OR 3.1, 95% CI 1.5-6.4), age ≥ 50 years (OR 2.8, 95% CI 1.5-5.0), tachycardia at triage (OR 2.5, 95% CI 1.1-5.4), urinary leukocyte esterase (OR 2.3, 95% CI 1.2-4.5), abnormal serum white blood cells (OR 2.0, 95% CI 1.2-3.3), and history of renal colic (OR 1.8, 95% CI 1.1-3.1) were factors independently associated with urologic intervention within 90 days.
CONCLUSIONS: Our study reports eight risk factors associated with urologic intervention within 90 days in patients presenting to the ED with renal colic. These risk factors should be considered when making management, prognostic, and disposition decisions for patients with suspected urolithiasis.
OBJECTIVE: Our primary objective was to confirm previously reported risk factors and to identify additional predictors of urologic intervention within 90 days, for emergency department (ED) patients with suspected renal colic.
METHODS: We conducted a prospective cohort study of adult patients presenting to one of two tertiary care EDs with suspected renal colic over a 20-month period. Multivariate logistic regression models determined predictor variables independently associated with urologic intervention.
RESULTS: Of the 565 patients included in the analysis, 220 (38.9%) patients had a ureteric stone visualized on diagnostic imaging. Eighty-four patients (14.9%) had urologic intervention within 90 days of their initial ED visit. Urinary nitrites (odds ratio [OR] 4.2, 95% confidence interval [CI] 1.3-13.6), stone size ≥ 5 mm (OR 4.2, 95% CI 2.4-7.4), proximal ureteric stone (OR 3.1, 95% CI 1.5-6.4), age ≥ 50 years (OR 2.8, 95% CI 1.5-5.0), tachycardia at triage (OR 2.5, 95% CI 1.1-5.4), urinary leukocyte esterase (OR 2.3, 95% CI 1.2-4.5), abnormal serum white blood cells (OR 2.0, 95% CI 1.2-3.3), and history of renal colic (OR 1.8, 95% CI 1.1-3.1) were factors independently associated with urologic intervention within 90 days.
CONCLUSIONS: Our study reports eight risk factors associated with urologic intervention within 90 days in patients presenting to the ED with renal colic. These risk factors should be considered when making management, prognostic, and disposition decisions for patients with suspected urolithiasis.
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