Study by DoM Neurology Resident Candace Marsters and team shows patients with neurological disease are likelier to die after COVID

By Geoff McMaster, Folio

People with neurological disease have a greater chance of death after contracting COVID-19, according to a new U of A study. The research also confirms a higher risk of developing new neurological disorders after COVID infection.

“For those who have neurological diseases — if you have Parkinson’s, if you have dementia, if you have a seizure disorder — you should seriously consider getting a vaccine,” and carefully monitor symptoms after contracting the virus, says neurology resident Candace Marsters, first author on the paper published recently in the journal Brain.

The study is the first to look at a large population of people previously diagnosed with disorders such as dementia, Parkinson’s, encephalopathy and epilepsy — as well as those with a history of stroke or seizures — before and after contracting COVID.

Marsters says her team — which includes Faculty of Medicine & Dentistry researchers Grace Lam, Christopher Power, Jeffrey Bakal and Finlay McAlister — had access to a huge dataset that included 350,000 Alberta patients who tested positive for COVID in the first year of the pandemic.

The team compared symptoms emerging in the acute phase of the illness, i.e., the first seven days to three months after infection, to those emerging between three months and nine months after infection.

The findings align with other studies that show an increased mortality rate during the COVID-19 pandemic among people with premorbid neurological conditions, Marsters says. She points out that — while her team found an association between COVID infection and neurological disease mortality — they were not able to establish causation.

Marsters’ study also confirms others that show COVID infection can affect the brain and nervous system — including incidence of encephalopathy, dementia, seizure/epilepsy, brain fog and myelitis — within three months of a positive COVID test. Her team also found a higher incidence of inflammatory myopathy and coma within nine months of infection.

The study says that, since the risk of being diagnosed with a neurological disease continues for an extended period after a COVID infection, it “warrants heightened awareness of these disorders during medical followup.”