Health
COVID-19 is associated with a “significant” decline in intelligence: research
According to a large study in the Toronto-UK, individuals who recovered from COVID-19 (including individuals who had no symptoms) showed significant “cognitive impairment.”
Conducted by scholars at Imperial College London, King’s College, Cambridge University, University of Southampton, and the University of Chicago, this study aims to clarify how COVID-19 affected mental health and cognition.
For the study, researchers analyzed data from 81,337 participants Great British Intelligence Test From January to December 2020. Nearly 13,000 of these participants reported being infected with the new coronavirus.
Importantly, the study states that only 275 participants completed intelligence tests both before and after being infected with COVID-19.
For the remaining participants, researchers developed general cognitive or premorbid intelligence based on age (up to 3rd grade), gender, dominant hand, ethnicity, first language, country of residence, and occupational status. He said he adopted a linear model to predict, and revenue.
“The general performances predicted and observed are substantially correlated and provide a surrogate measure of premorbid intelligence in performance comparable to common explicit tests such as the National Adult Reading Test,” the study said. Stated.
In addition, scholars also say that pre-illness estimates of an individual’s intelligence are more likely to be “slightly higher than low cognitive ability” before getting sick in people infected with COVID-19. I also found that it shows that.
After adjusting for these factors, they found that people infected with COVID-19 performed poorly compared to those who had never been infected with COVID-19.
Cognitive deficits were particularly pronounced in test tasks including reasoning, problem solving, spatial planning, and target detection, but those with COVID-19 completed simpler tasks such as working memory span and emotional processing. It worked when I was asked to.
“These results are consistent with long COVID reports, where’brain fog’, difficulty concentrating, and difficulty finding the correct word are common,” the authors say. “Recovery from COVID-19 infection may be associated with particularly prominent problems in terms of higher cognitive or” executive “functions. “
The authors found that their results are related to cognitive deficits that may persist into convalescence, such as in the case of long COVID infections, where COVID-19 infection can last weeks or months from the first illness. He said it seems to indicate that he is.
The level of performance degradation also depended on the severity of the disease in the group infected with COVID-19 during the pandemic. According to this study, people wearing a ventilator during a pandemic showed the greatest cognitive impairment, which is equivalent to a 7-point reduction in IQ on classical intelligence tests.
According to the paper, the decline in intelligence among ventilated people was greater than the defects observed in patients who had previously suffered a stroke or reported learning disabilities.
The authors warned against drawing firm conclusions about the neurobiological or psychological basis of intellectual impairment without brain imaging data. However, they said the results should serve as a clear call for further research on this subject.
the study, “Cognitive impairment in people who have recovered from COVID-19, ”Was published in the journal The Lancet last week.
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