- Large retrospective cohort study.
- Due to the retrospective nature of the study, not all laboratory tests were performed on all patients.
- Several factors were not taken into account due to the retrospective design (stroke subtypes, infarction volume, and recanalization rates).
- Selection bias due to the reluctance of patients with COVID-related symptoms or infection to come forward for neurological assessment in hospital unless extremely necessary, such as stroke, epilepsy, or other major neurological disorders.
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