Recurrent stroke admissions with vs without COVID-19 and associated in-hospital mortality: A United States nationwide analysis, 2020.

Background: Coronavirus disease 2019 (COVID-19) has been shown to increase the risk of stroke. However, the prevalence and risk of recurrent stroke in COVID-19 patients with prior stroke/transient ischemic attack (TIA), as well as its impact on mortality, are not established.

Aim: To evaluate the impact of COVID-19 on in-hospital mortality, length of stay, and healthcare costs in patients with recurrent strokes.

Methods: We identified admissions of recurrent stroke (current acute ischemic stroke admissions with at least one prior TIA or stroke) in patients with and without COVID-19 using ICD-10-CM codes using the National Inpatient Sample (2020). We analyzed the impact of COVID-19 on mortality following recurrent stroke admissions by subgroups.

Results: Of 97455 admissions with recurrent stroke, 2140 (2.2%) belonged to the COVID-19-positive group. The COVID-19-positive group had a higher prevalence of diabetes and chronic kidney disease vs the COVID-19 negative group (P < 0.001). Among the subgroups, patients aged > 65 years, patients aged 45-64 years, Asians, Hispanics, whites, and blacks in the COVID-19 positive group had higher rates of all-cause mortality than the COVID-19 negative group (P < 0.01). Higher odds of in-hospital mortality were seen in the group aged 45-64 (OR: 8.40, 95%CI: 4.18-16.91) vs the group aged > 65 (OR: 7.04, 95%CI: 5.24-9.44), males (OR: 7.82, 95%CI: 5.38-11.35) compared to females (OR: 6.15, 95%CI: 4.12-9.18), and in Hispanics (OR: 15.47, 95%CI: 7.61-31.44) and Asians/Pacific Islanders (OR: 14.93, 95%CI: 7.22-30.87) compared to blacks (OR: 5.73, 95%CI: 3.08-10.68), and whites (OR: 5.54, 95%CI: 3.79-8.09).

Conclusion: The study highlights the increased risk of all-cause in-hospital mortality in recurrent stroke patients with COVID-19, with a more pronounced increase in middle-aged patients, males, Hispanics, or Asians.