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Cognitive Profiling and Validation of a Digital Cognitive Assessment Tool in Post-COVID-19 Condition: Protocol for a Single-Center, Cross-Sectional Study (DigiCog Study)

Lacomba-Arnau, E.; Da Rocha Oliveira, R.; Monteiro, S.; Pauly, C.; Vaillant, M.; Celebic, A.; Bulaev, D.; Fischer, A.; Fagherazzi, G.; Fernandez, G.; Shulz, M.; Perquin, M.

2026-04-16 neurology
10.64898/2026.04.14.26350862 medRxiv
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Methods: DigiCog is a single-center cross-sectional study conducted within the Luxembourgish Predi-COVID cohort (NCT04380987). Participants aged 25-65 years, with and without persistent COVID-19 symptoms, are invited to participate. Cognitive assessments are performed during face-to-face sessions by trained nurses and neuropsychologists using both the VMTech device and standardized neuropsychological tests. Additional data on PCC symptom status, CR, sociodemographic characteristics, fatigue, and psychological factors are also collected. Agreement between digital and standard cognitive assessments will be evaluated using Cohen's kappa coefficient, with sensitivity, specificity, and receiver operating characteristic analyses as secondary measures. Cognitive performance will be compared between participants with and without PCC, and associations with CR proxies will be explored.

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