One British study, with more than 80,000 participants, found that recovered patients who had the long form of covid-19 may have cognitive problems that impair memory and reasoning, creating a kind of “mental fog”.
Compared to people who have not had the condition, the performance of these individuals may be worse than the performance of those who have suffered a stroke or were previously diagnosed with learning disabilities.
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Experts from Imperial College and King’s College created a 16-step questionnaire to test patients. Each is intended to measure a mental skill, such as the ability to make verbal analogies.
Patients who required intubation had the worst performance compared to the mean, with -0.47 points (all participants had 0 as the reference value). As for patients who caught the coronavirus but stayed at home, the score was -0.26.
Neuroscientist Adam Hampshire, one of the authors of the research, said in a Twitter post that the association between covid-19 and a wide range of impairments to cognitive function is worrying. “Now we need more research to determine how long these deficits last and what their biological and physiological explanation is,” he wrote.
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