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  • High safety-net hospital burden is associated with increased time to coiling in aneurysmal subarachnoid hemorrhage

    Final Number:

    Arati B Patel BS; Frances Chow MD; Li Ding MD MPH; Christianne Lane PhD; Arun Paul Amar MD; Steven L. Giannotta MD; Frank Attenello MD; William J. Mack MD

    Study Design:

    Subject Category:
    Aneurysm/Subarachnoid Hemorrhage

    Meeting: AANS/CNS Cerebrovascular Section 2018 Annual Meeting

    Introduction: Subarachnoid hemorrhage carries population-based mortality rates as high as 45%. Surgical treatment within 3 days of aneurysmal subarachnoid hemorrhage (aSAH) is associated with improved morbidity and mortality outcomes. Previous studies have identified patient-level factors influencing time to treatment, such as socioeconomic and insurance status, but not hospital-level characteristics. The impact of hospital-safety net burden on surgical management of aSAH remains unclear. This information can guide interventions aimed at reducing adverse outcomes associated with the surgical management of aSAH.

    Methods: Patients were pulled from 2002 to 2011 Healthcare Cost and Utilization Project (HCUP) Nationwide Inpatient Sample (NIS) database national registry database. Hospitals were grouped according to safety-net burden, defined as the proportion of Medicaid and uninsured patient charges for all hospitalizations. Patients had aneurysmal subarachnoid hemorrhage (SAH, ICD-9 430.xx) and underwent endovascular coiling procedure (39.79, 39.72, 39.52) were included. Generalized linear mixed model was used for multivariate analysis, control for confounding variables, survey stratum, and clustering, using Poisson regression approach2. Delayed time to coil was defined as greater than 3 days.

    Results: A total of 7,946 were noted with SAH and coiling procedure were noted during the study period. The degree of safety-net burden was independently associated with coil time in patients aSAH. High-burden hospitals had higher odds of increased coil time (RR= 1.34, CI 95% 1.08-1.66, p<0.01) compared to Low-burden and Medium-burden hospitals (RR=0.8, CI 95% 0.64-0.99, p=0.03).

    Conclusions: High-burden hospitals have increased odds of delayed coil time in aSAH. This is consistent with established literature on inferior surgical outcomes at high-burden hospitals. Safety-net hospitals face a number of obstacles to quality improvement and it is important to recognize how this influences complex neurosurgical procedures.

    Patient Care: Safety-net hospitals face a number of obstacles to quality improvement and it is important to recognize how this influences time to treat in aneurysmal subarachnoid hemorrhage, a condition that carries significant morbidity and mortality.

    Learning Objectives: By the conclusion of this session, participants should be able to 1) Understand hospital-safety net burden classification 2) Recognize safety-net status as a factor influencing the surgical treatment of aneurysmal subarachnoid hemorrhage


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