The Conners Continuous Performance Test CPT3™: Is it a reliable marker to predict neurocognitive dysfunction in Myalgic encephalomyelitis/chronic fatigue syndrome?

Observed Findings

• ME/CFS patients showed significantly worse performance than healthy controls on all main CPT3™ measures, including attention, sustained focus, vigilance, and reaction time.
• Variability and Hit Reaction Time were identified as the most discriminative indicators for distinguishing ME/CFS patients from healthy controls.
• ME/CFS patients exhibited slower reaction times, greater impulsivity, and atypical T-scores similar to patterns seen in Attention Deficit Hyperactivity Disorder.
• Relevant correlations were found between different CPT3™ variables within the patient group, suggesting interconnected cognitive deficits.
• The test successfully differentiated the two groups across multiple cognitive domains.

Inferred Conclusions

• CPT3™ is a valid and useful tool for detecting neurocognitive impairments in attention and response speed in ME/CFS patients.
• Response speed measures (Variability and Hit Reaction Time) are particularly sensitive markers of ME/CFS-related cognitive dysfunction.
• CPT3™ could serve as an objective marker for diagnosing ME/CFS and monitoring disease severity.
• The observed cognitive profile in ME/CFS shares features with attention-deficit disorders, though ME/CFS-specific mechanisms remain unclear.

Remaining Questions