What are the typical reference ranges for Chronic Fatigue Syndrome (CFS) Severity Index?

CFS Score: < 5 (Mild/Fatigue only) | 5–9 (Moderate CFS Profile) | ≥ 10 (Severe CFS Profile)

What does a high or low result indicate?

Evaluates fatigue levels according to Canadian Consensus Criteria for ME/CFS, highlighting post-exertional fatigue.

Chronic Fatigue Syndrome (CFS) Severity Index

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🧪 Chronic Fatigue Syndrome (CFS) Severity Index

Evaluates Chronic Fatigue Syndrome (CFS/ME) severity by assessing post-exertional malaise (PEM), unrefreshing sleep patterns, cognitive fog, and orthostatic symptoms.

Post-Exertional Malaise (Extreme crash lasting 24+ hrs after minor activity)

Unrefreshing Sleep (Waking up exhausted regardless of sleep duration)

Brain Fog / Cognitive difficulties

Dizziness/Lightheadedness when standing (Orthostatic Intolerance)

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