ArticleJournal of neurology2023
Characterizing long-COVID brain fog: a retrospective cohort study.
Article in Journal of neurology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 3 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
14 citing papers in PubMed, 3 syntheses or guidelines pooled it.
- Prevalence and long-term outcomes of brain fog and cognitive impairment in individuals with long COVID: A systematic review.Medicine · 2026Pooled it
- Intervention modalities for brain fog caused by long-COVID: systematic review of the literature.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2024Pooled it
- COVID-19 risk, course and outcome in people with mental disorders: a systematic review and meta-analyses.Epidemiology and psychiatric sciences · 2023Pooled it
- A systematic scoping review and conceptual analysis of new-onset fibromyalgia manifestations after non-hospitalized COVID-19: empirics, definitions, methodologies, pathophysiology, mapping of literature, and knowledge gaps.Journal of translational medicine · 2026Article
- Long COVID affects working memory: assessment using a single rapid online test.Frontiers in human neuroscience · 2026Article
- Article
- How do fatigue, cognitive dysfunction, activity and role functioning, and mental health inter-relate in adults with post-COVID-19 syndrome? A structural equation model analysis.Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation · 2025Article
- Persistent pain and brain fog after COVID-19 infection in European adults aged 50 and over: a population-based longitudinal study.BMC infectious diseases · 2025Article
- NRICM101 in combatting COVID-19 induced brain fog: Neuroprotective effects and neurovascular integrity preservation in hACE2 mice.Journal of traditional and complementary medicine · 2025Article
- Long COVID patients' brain activation is suppressed during walking and severer symptoms lead to stronger suppression.European archives of psychiatry and clinical neuroscience · 2024Article
- Social impact of brain fog and analysis of risk factors: Long COVID in Japanese population.Annals of clinical and translational neurology · 2024Article
- The Effect of Sex on the Risk of Long-COVID and Cardiovascular Complications in Healthy Patients without Comorbidities: Data from a Polish Long-COVID Cardiovascular (PoLoCOV-CVD) Study.Journal of clinical medicine · 2024Article
- rTMS for post-covid-19 condition: A sham-controlled case series involving iTBS-300 and iTBS-600.Brain, behavior, & immunity - health · 2024Article
- Subjective brain fog: a four-dimensional characterization in 25,796 participants.Frontiers in human neuroscience · 2024Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundLong COVID or post-COVID condition (PCC) is a common complication following acute COVID-19 infection. PCC is a multi-systems disease with neurocognitive impairment frequently reported regardless of age. Little is known about the risk factors, associated biomarkers and clinical trajectory of patients with this symptom.
objectiveTo determine differences in clinical risk factors, associated biochemical markers and longitudinal clinical trajectories between patients with PCC with subjective neurocognitive symptoms (NC+) or without (NC-).
methodsA retrospective longitudinal cohort study was performed using a well-characterized provincial database of patients with clinically confirmed PCC separated into NC+ and NC- cohorts. Demographical, clinical and biochemical differences at initial consultation between the two patient cohorts were analyzed in cross-section. Multivariate regression analyses were conducted to identify independent risk factors for neurocognitive impairment. Determination of the recovery trajectory was performed using serial assessments of the patient-reported health-related quality of life (HR-QoL) metric Eq-5D-5L-vas score.
findingsWomen, milder acute infection and pre-existing mental health diagnoses were independently associated with subjective neurocognitive impairment at 8 months post-infection. NC + patients demonstrated lower levels of IgG, IgG1 and IgG3 compared to NC- patients. The NC + cohort had poorer HR-QoL at initial consultation 8 months post-infection with gradual improvement over 20 months post-infection.
conclusionsNeurocognitive impairment represents a severe phenotype of PCC, associated with unique risk factors, aberrancy in immune response and a delayed recovery trajectory. Those with risk factors for neurocognitive impairment can be identified early in the disease trajectory for more intense medical follow-up.
Indexed as
Identifiers
37555926What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.