Sleep patterns among patients with chronic fatigue: A polysomnography-based study.
Pajediene, Evelina, Bileviciute-Ljungar, Indre, Friberg, Danielle · The clinical respiratory journal · 2018 · DOI
Quick Summary
This study looked at sleep problems in people with chronic fatigue by using a sleep monitoring test called polysomnography. Researchers found that more than half of the fatigued patients who also felt excessively sleepy had treatable sleep disorders like sleep apnea, restless legs, or periodic leg movements. The authors suggest that people with these symptoms should be tested for sleep disorders and treated before being diagnosed with ME/CFS, since fixing the sleep problem might help with fatigue.
Why It Matters
This research highlights an important clinical issue: many people diagnosed with ME/CFS may actually have treatable sleep disorders contributing to their fatigue. Identifying and treating these underlying sleep problems could significantly improve patient outcomes and may prevent misdiagnosis. The study supports the need for comprehensive sleep evaluation as part of the diagnostic workup for chronic fatigue.
Observed Findings
Among 78 patients who underwent polysomnography, 40.3% were diagnosed with obstructive sleep apnea, 41.0% with restless legs syndrome, and 8.9% with periodic limb movement disorder.
Patients not meeting ME/CFS diagnostic criteria had significantly higher respiratory arousal index, total arousal index, and oxygen desaturation index compared to those meeting criteria.
69.3% of tested patients had one or more sleep disorder diagnosed on polysomnography.
70.5% of the 78 polysomnography patients fulfilled diagnostic criteria for ME/CFS.
Inferred Conclusions
More than half of chronic fatigue patients with excessive daytime sleepiness or tiredness have diagnosable sleep disorders requiring treatment.
Patients should be systematically screened and treated for sleep disorders before an ME/CFS diagnosis is established.
Objective sleep studies (polysomnography) combined with questionnaires are needed to identify treatable sleep pathology in this population.
Remaining Questions
Do patients with ME/CFS-like symptoms improve clinically after treatment of identified sleep disorders, and to what extent?
What proportion of ME/CFS diagnoses would be reconsidered or eliminated if all suspected patients underwent polysomnography rather than only those with excessive daytime sleepiness?
What This Study Does Not Prove
This study does not establish that sleep disorders cause ME/CFS or that treating them cures the condition. It is a cross-sectional snapshot and cannot prove causality or show whether treating these sleep disorders actually improves fatigue in ME/CFS patients. Additionally, the study only examined patients with excessive daytime sleepiness, so findings may not apply to all ME/CFS patients.
Tags
Symptom:Unrefreshing SleepFatigue
Method Flag:PEM Not DefinedWeak Case DefinitionSmall Sample