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Abstract Details

Comparing Ischemic Stroke Volumes Across a Large Multi-State Health System Prior to and During the Covid-19 Pandemic
Cerebrovascular Disease and Interventional Neurology
Cerebrovascular Disease and Interventional Neurology Posters (7:00 AM-5:00 PM)
026
To determine the impact of COVID-19 pandemic on stroke volumes by comparing observed and forecasted admissions before and during the pandemic across a large hospital system and by state.
Some studies have shown the impact of Covid-19 on hospital admissions. However, there are few that focus on stroke patients and whether impact was consistent across states. 
Medical record data were extracted for the health system (51 hospitals across seven western states) for ischemic stroke patients admitted January 2019-March 15, 2020 (pre-pandemic) and March 16, 2020-May 31, 2020 (pandemic). Observed pre-pandemic and pandemic volumes were compared for the system and by state using Wilcoxon rank-sum tests. ARIMA models were used to forecast the expected weekly volumes during the pandemic based on pre-pandemic data. Medians and 95% confidence intervals are reported.

A total of 14,584 patients were included in the analysis, 87.2% (n=12,710) in the pre-pandemic period and 12.8% (n=1,874) in the pandemic period. The weekly observed pre-pandemic versus pandemic and forecasted admissions were as follows:  202 (199, 206) vs 165 (153, 177) (p < 0.01) and 201 (199, 204)  for the system; 82 (79, 84) vs 65 (58,73) (p < 0.01)  and 85 (79,91) for California; 74 (72,77) vs 62 (56,68) (p < 0.01) and 72 (69,76) for Washington; 25 (24, 26) vs 21 (17, 24) (p = 0.017) and 26 (23, 30) for Oregon; 11 (10,12) vs 12 (10,15) (p = 0.33) and 11 (10,12) for Texas; 6 (6, 7) vs 4 (3, 5) (p < 0.01) and 5 (4, 6)  for Alaska; and  4 (4, 5) vs  4 (2, 5) (p=0.40) and 3 (2, 4)  for Montana.

Ischemic stroke admissions were significantly lower across our 7-State health system during the pandemic compared to prior. However, we found the difference was largely driven by one state, California.
Authors/Disclosures
Tamela Stuchiner (Providence Brain and Spine Institute)
PRESENTER 		Ms. Stuchiner has nothing to disclose.
Elizabeth A. Baraban, PhD, MPH (Providence Health and Services) The institution of Dr. Baraban has received research support from Boehringer Ingelheim.
No disclosure on file