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Predicting Length of Stay For Acute Stroke Patients Using 24 Hours Of Hemodynamic Features

Team Members:
  • Zach Murphy
  • Michael Ainsworth
  • Alex Hepp
  • Varun Naga
  • Athena Olszewski
  • Mona Bahouth
  • Elizabeth Zink
  • Raimond L Winslow
  • Joseph L Greenstein


During the acute stroke period, there is a disruption of the blood-brain barrier and cerebral blood flow autoregulation, which results in a direct relationship between hemodynamics and brain perfusion. Improved understanding of the relationship between hemodynamic trends and clinical outcomes could provide predictive insight. The goal of this work was to predict hospital length of stay using the patient’s demographic information and hemodynamic profile. We conducted a retrospective cohort study for stroke patients admitted to an urban comprehensive stroke center between 2016-2019. Data included hemodynamic parameters such as pulse, temperature, and blood pressure as well as demographics and comorbidities. Our primary outcome was length of stay greater than or equal to 7 days. Using an XGBoost classifier we obtained an AUC of 0.840, with the optimal operating point achieving a sensitivity of 0.73 and specificity of 0.83. The precision-recall curve for this model had an AUC of 0.768. The application of this model could augment the care coordination process and provide a categorization of patient recovery trajectory.


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