Tag: processing speed

Clinical Symptomatology, Cognition and Psychosocial Wellbeing in Adolescents With Myalgic Encephalomyelitis/Chronic Fatigue Syndrome: A Cross-Sectional Observational Study

Abstract:

Aim: Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is a disabling illness that frequently begins in adolescence, yet adolescents with ME/CFS remain an under-researched population. We aimed to characterise the cognitive and psychosocial wellbeing of adolescents with ME/CFS relative to normative benchmarks and unaffected age-peers.

Methods: Adolescents with mild-to-moderate ME/CFS (n = 25) and healthy controls (n = 25) aged 10-19 years were recruited in Melbourne, Australia. Each completed a set of clinical questionnaires and cognitive assessments to assess ME/CFS symptomatology, school functioning, psychosocial wellbeing and cognition. Their caregivers also completed questionnaires regarding their psychosocial wellbeing and everyday executive functioning.

Results: Adolescents with ME/CFS showed significantly reduced information processing speed, though other measures of intellectual functioning did not differ consistently between groups. The ME/CFS group also reported significantly poorer sleep, quality of life and higher levels of anxiety and depression. Caregivers further identified significant attention and working memory concerns in the ME/CFS group, but reported no differences in internalising behaviours between groups.

Conclusion: Adolescents with ME/CFS experience substantial psychosocial and physical burden because of their illness. Cognitive difficulties in ME/CFS may reflect inefficiencies in information processing speed and fluctuating symptom burden. Discrepancies between adolescent self-report and caregiver ratings underscore the importance of inclusive perspectives in ME/CFS management. These findings support the need for flexible, paced educational and clinical accommodations and for further research into the dynamic cognitive profile of adolescents with ME/CFS across a more representative population.

Source: Chau T, Josev EK, Scheinberg A, Thomas N, McDonald F, Reveley C, Gooley PR, Armstrong C, Knight S. Clinical Symptomatology, Cognition and Psychosocial Wellbeing in Adolescents With Myalgic Encephalomyelitis/Chronic Fatigue Syndrome: A Cross-Sectional Observational Study. J Paediatr Child Health. 2026 Sep 20. doi: 10.1111/jpc.70587. Epub ahead of print. PMID: 42764669. https://onlinelibrary.wiley.com/doi/10.1111/jpc.70587 (Full text)

Two-timepoint multidomain follow-up of post-COVID condition and ME/CFS: overlapping autonomic, small-fiber, and cognitive changes

Abstract:

Background: Post-COVID condition (PCC) and Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) show marked clinical overlap, suggesting a shared post-infectious pathophysiology. This study aims to characterize the longitudinal change of autonomic function, small-fiber integrity, cognitive performance, and clinical symptoms in PCC and ME/CFS, and to determine whether trajectories differ between diagnostic groups.

Methods: Thirty-eight participants (21 PCC, 17 ME/CFS) underwent two standardized evaluations separated by a median of 31 months. Assessments included comprehensive autonomic testing, small-fiber evaluation, and an extensive neuropsychological battery.

Results: ME/CFS showed longer disease duration than PCC at baseline (median 42 vs. 12 months), while the interval between evaluations was comparable (31 vs. 30 months). Baseline profiles were largely overlapping, although ME/CFS showed nominally higher QST warm detection thresholds (p = 0.034), greater autonomic symptom burden (p = 0.038), and lower hemodynamic scores (p = 0.019), none surviving FDR correction. Cross-domain analyses linked small-fiber symptoms with autonomic symptom burden (Rho = 0.65, pFDR = 0.002) and fatigue (Rho = 0.55, pFDR = 0.018), while fatigue was negatively associated with processing speed (Rho = – 0.57, pFDR = 0.004), attention (Rho = – 0.49, pFDR = 0.018), and executive function (Rho = – 0.44, pFDR = 0.047). Rank-transformed mixed-effects models identified FDR-corrected Time effects, with increases in CHEPs (pFDR < 0.001) and verbal memory (pFDR = 0.010), and decreases in processing speed (pFDR = 0.006) and QST cold thresholds (pFDR = 0.038).

Conclusions: PCC and ME/CFS showed broadly overlapping multidomain profiles, with particularly similar profiles at follow-up. This suggests that, among individuals with persistent symptoms, PCC may increasingly resemble longer-standing ME/CFS across autonomic, small-fiber/sensory, and cognitive domains. These findings are consistent with overlapping post-infectious mechanisms, but do not establish identical disease trajectories or definitive disease convergence.

Source: Azcue N, Barranco C, Tijero-Merino B, Acera M, Fernández-Valle T, Lafuente JV, Gabilondo I, Ruiz-Lopez M, Del Pino R, Gómez-Esteban JC. Two-timepoint multidomain follow-up of post-COVID condition and ME/CFS: overlapping autonomic, small-fiber, and cognitive changes. J Transl Med. 2026 Jun 12. doi: 10.1186/s12967-026-08321-9. Epub ahead of print. PMID: 42286686. https://link.springer.com/article/10.1186/s12967-026-08321-9 (Full study available as PDF file)