Cognitive Abilities One Year Post-COVID-19 Infection
Overview
This prospective cohort study evaluated cognitive function changes approximately one year after COVID-19 infection using objective computerized testing. Among 110 participants, no significant decline in overall cognitive function was observed in those who contracted COVID-19 compared to those who did not. The COVID-negative group showed modest improvements in several cognitive domains over time.
Background
COVID-19 has been associated with neurological symptoms during acute infection and concerns about long-term cognitive impairment, often termed Long COVID. The pathophysiology of cognitive sequelae may involve direct viral effects on the central nervous system, endothelial dysfunction, neuroinflammation, and metabolic disturbances. Prior studies have been limited by retrospective designs and subjective assessments, highlighting the need for prospective, objective evaluations of cognition post-infection. This study uses the FDA-cleared Cognivue Clarity® device to objectively assess cognitive changes in a cohort with baseline pre-infection cognitive data.
Data Highlights
Group
Number of Participants
Median Age (years)
Female (%)
White (%)
Follow-up Duration
Change in Memory Score
Change in Overall Cognivue Score
Change in Visuospatial Score
Change in Executive Function Score
Change in Naming Language Score
COVID+
55
45
35%
46%
~1 year
+3.9 (P = .03)
NS
NS
NS
NS
COVID-
55
45
35%
46%
~1 year
NS
+2 (P = .03)
+1.9 (P = .04)
+2.2 (P = .02)
+2.2 (P = .01)
Key Findings
No statistically significant difference in overall cognitive scores or subdomains between COVID-positive and COVID-negative groups at one year.
COVID-positive participants showed a modest but statistically significant improvement in memory scores (+3.9; P = .03) over follow-up.
COVID-negative participants demonstrated significant improvements in overall cognition (+2; P = .03), visuospatial (+1.9; P = .04), executive function (+2.2; P = .02), and naming language (+2.2; P = .01) scores.
The study cohort had a median age of 45 years, with balanced demographics between groups.
In a middle-aged population with mild to moderate COVID-19, no evidence of cognitive decline was observed one year post-infection, suggesting that long-term cognitive impairment may not be universal. Clinicians can consider that cognitive function may remain stable or even improve over time in non-hospitalized patients. Objective cognitive assessments may be valuable in distinguishing true cognitive sequelae from subjective complaints in post-COVID care.
Conclusion
This prospective study found no decline in cognitive function one year after COVID-19 infection in a community-based cohort, with some cognitive domains improving in both infected and uninfected individuals. These findings provide reassurance regarding long-term cognitive outcomes in average middle-aged adults following COVID-19.
References
University Hospitals Cleveland Medical Center Study -- Cognitive Abilities One Year Post-COVID-19 Infection
