Cognitive difficulties persisted after COVID-19 in older adults
An observational study of 49 hospitalized adults aged 60 or older found no improvement in cognitive performance between acute illness and follow-up.
Independent replication
Limit: Only 49 hospitalized adults contributed to the clinical findings
Forty-nine adults aged 60 or older who were hospitalized with COVID-19 contributed 147 observations in a longitudinal observational study. Researchers compared cognition and other aspects of health across pre-illness, acute illness and follow-up states. Cognitive test performance declined during acute COVID-19 compared with the pre-illness state and showed no detectable improvement during follow-up. Depressive symptoms and mobility also remained impaired, while functional status and nutritional measures partly recovered.
Separate analyses of gene activity used three independent public cohorts of older adults. The most reproducible molecular finding was increased activity in pathways responding to interferons, proteins involved in immune responses. In the clinical study, age was the only independent predictor of poorer outcomes across several health domains.
Why it matters
Age-related changes in immune regulation may constrain recovery after COVID-19. The authors identified interferon signaling as a potential target for improving long-term outcomes in older survivors.
Caveats
The observational design cannot establish that interferon responses caused poor cognitive recovery. The clinical findings concern 49 hospitalized adults aged 60 or older and do not establish outcomes in younger people or those who were not hospitalized.
The paper
Center for Research and Advanced Studies (Cinvestav); Instituto Mexicano del Seguro Social
Current Aging Science, Oct 14, 2026
