Neurological disorders throughout acute SARS-CoV2 infection: a comparative study between vaccinated and non-vaccinated patients

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Abstract Background The role of vaccination on Covid-19 severity in neurological patients is still unknown. We aim at describing clinical characteristics and outcomes of breakthrough and unvaccinated Covid-19 patients hospitalized for neurological disorders. Methods Two hundred thirty-two Covid-19 patients were admitted to a neuro-Covid Unit form March 2021 to February 2022. Out of the total sample, 74 (32%) were full vaccinated. The prevalence, clinical characteristics and final outcomes of neurological syndromes were compared between vaccinated and unvaccinated cases. Results Breakthrough vaccinated cases were older (years 72.4+16.3 vs 67.0+18.9 years, p=0.029), showed higher pre-admission comorbidity score and Clinical Frailty scale score (4.46+1.6 vs 3.75+2.0, p=0.008) with no differences in terms of disease progression or mortality rate (16.2% vs 15.2%), compared to full-dose vaccinated patients. Cox-regression analysis showed age and NEWS2 score as the variables with a significant relation to mortality between the two groups, independently from pre-morbid conditions and inflammatory response. Conclusion This study on breakthrough COVID-19 infection could help identify vulnerable neurological patients with higher risk of poor outcomes.

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