A recent study published in JAMA Network Open reveals a significant decline in cognitive function among individuals who contracted COVID-19, even those who experienced mild symptoms. Researchers compared cognitive test results of over 110,000 participants before and after the onset of the pandemic, focusing on those who tested positive for COVID-19.
The study found that individuals who contracted COVID-19, regardless of hospitalization status, demonstrated a measurable decrease in cognitive performance compared to their pre-COVID abilities and to a control group who did not contract the virus. The impact was particularly pronounced in areas of executive function, such as planning, problem-solving, and working memory.
The cognitive deficits observed were equivalent to approximately three to six IQ points, suggesting a subtle but potentially impactful decline. Researchers emphasized that the effects were noticeable even in individuals with mild or asymptomatic cases of COVID-19, indicating that the virus can affect cognitive function without requiring severe illness.
The study underscores the potential for long-term neurological consequences following COVID-19 infection and suggests a need for continued monitoring and research into the lasting effects of the virus on brain health. The findings highlight the importance of understanding the cognitive implications of COVID-19 beyond the acute phase of infection.
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