People who have had COVID-19 face increased risks of neurological and psychiatric conditions like brain fog, psychosis, seizures and dementia up to two years after infection.

Driving the news: That's according to a new large-scale University of Oxford study that also found anxiety and depression were more common after COVID, though typically subsided within two months of infection.

Why it matters: The study, published in the Lancet Psychiatry journal on Wednesday, is the "first to attempt to examine some of the heterogeneity of persistent neurological and psychiatric aspects of COVID-19 in a large dataset," per an accompanying editorial.

Flashback: A University of Oxford study last year found a third of COVID patients had experienced a psychiatric or neurological illness six months after infection.

By the numbers: For the latest study, researchers examined the risks of 14 different disorders in over 1.25 million patients, ranging from children to seniors who were mostly in the U.S., two years on from COVID infection.

What they found: Adults who were 64 years old and younger who'd had the coronavirus were more at risk of brain fog (640 cases per 10,000 people) compared with those who'd had different respiratory infections (550 cases per 10,000 people).

Meanwhile, there were 450 cases of dementia per 10,000 people and 85 occurrences of psychotic disorders per 10,000 among patients over 65 post-COVID.

Worth noting: Researchers found children were twice as likely to develop epilepsy or seizures (260 in 10,000) within two years of a COVID infection, compared to those who'd had other respiratory infections (130 in 10,000).

What they're saying: Wes Ely, a Vanderbilt University School of Medicine professor who researches Long COVID, told STAT News the data showed the mood disorders and anxiety problems that are "prevalent in long COVID tended to resolve in a matter of months, which is great news" for the patients.

The bottom line, via Harrison: The findings highlight the need for more research to understand why such neurological conditions are occurring after COVID "and what can be done to prevent or treat these conditions."

Go deeper... Long COVID: The next health care crisis

Editor's note: This article has been updated with comment from Ely and more details from the study.