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COMPARATIVE STUDY
JOURNAL ARTICLE
Investigation into drivers of cost of stenting for carotid stenosis.
Journal of Vascular Surgery 2017 September
OBJECTIVE: We aimed to identify factors associated with cost of carotid artery stenting (CAS).
METHODS: Patient and hospital characteristics affecting cost of admission for CAS were identified using the Vizient national database of hospital-reported outcomes. Patients who underwent CAS for either asymptomatic or symptomatic carotid stenosis were identified using surgical Medicare Severity-Diagnosis Related Groups and appropriate International Classification of Diseases, Ninth Revision and Tenth Revision codes.
RESULTS: There were 166 hospitals that reported outcomes from 7369 inpatient admissions for CAS. Each institution reported a mean value for cost related to patient care per admission for CAS; the average cost across all reporting institutions was $12,834.14 (standard error of the mean [SEM], 492.88). Institutions in the lowest 25th percentile with respect to frequency of intensive care unit admission after CAS had lower cost of admission than institutions above the 75th percentile ($10,971.30 [SEM, 460.67] vs $14,992.90 [964.29]; P = .002), without any differences in incidence of stroke during admission (2.2% [SEM, 0.3] vs 2.0% [0.4]; P = .877) or 30-day readmission (1.9% [SEM, 0.4] vs 2.5 [0.6]; P = .329). Admissions for patients with symptomatic stenosis were more expensive than those with asymptomatic stenosis ($20,462.10 [SEM, 819.93] vs $11,285.20 [347.11]; P < .001). Obesity was also associated with greater costs of admission ($14,176.20 [SEM, 597.13] vs $12,287.10 [395.73]; P < .001).
CONCLUSIONS: Admission to an intensive care unit, symptomatic stenosis, and obesity were associated with increased costs in patients undergoing CAS. These data may aid in identifying opportunities to improve the cost-effectiveness of this procedure.
METHODS: Patient and hospital characteristics affecting cost of admission for CAS were identified using the Vizient national database of hospital-reported outcomes. Patients who underwent CAS for either asymptomatic or symptomatic carotid stenosis were identified using surgical Medicare Severity-Diagnosis Related Groups and appropriate International Classification of Diseases, Ninth Revision and Tenth Revision codes.
RESULTS: There were 166 hospitals that reported outcomes from 7369 inpatient admissions for CAS. Each institution reported a mean value for cost related to patient care per admission for CAS; the average cost across all reporting institutions was $12,834.14 (standard error of the mean [SEM], 492.88). Institutions in the lowest 25th percentile with respect to frequency of intensive care unit admission after CAS had lower cost of admission than institutions above the 75th percentile ($10,971.30 [SEM, 460.67] vs $14,992.90 [964.29]; P = .002), without any differences in incidence of stroke during admission (2.2% [SEM, 0.3] vs 2.0% [0.4]; P = .877) or 30-day readmission (1.9% [SEM, 0.4] vs 2.5 [0.6]; P = .329). Admissions for patients with symptomatic stenosis were more expensive than those with asymptomatic stenosis ($20,462.10 [SEM, 819.93] vs $11,285.20 [347.11]; P < .001). Obesity was also associated with greater costs of admission ($14,176.20 [SEM, 597.13] vs $12,287.10 [395.73]; P < .001).
CONCLUSIONS: Admission to an intensive care unit, symptomatic stenosis, and obesity were associated with increased costs in patients undergoing CAS. These data may aid in identifying opportunities to improve the cost-effectiveness of this procedure.
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