Sleep disturbances and fatigue in women with fibromyalgia and chronic fatigue syndrome.
Schaefer, K M · Journal of obstetric, gynecologic, and neonatal nursing : JOGNN · 1995 · DOI
Quick Summary
This study looked at sleep problems in women with fibromyalgia and chronic fatigue syndrome (CFS). Researchers found that both groups had significant sleep difficulties, and that trouble staying asleep was the most common sleep problem reported. There was a clear link between poor sleep and fatigue—women who slept poorly felt more tired.
Why It Matters
This study highlights that sleep disturbances are a significant and quantifiable problem in ME/CFS, not merely a secondary symptom. The finding that CFS patients experience worse sleep maintenance than those with similar conditions suggests sleep quality assessment should be a routine part of ME/CFS clinical evaluation.
Observed Findings
Moderately strong positive correlation between fatigue and sleepiness (r = .63, p < .01)
Trouble staying asleep was the highest-rated sleep disturbance across both groups
Women with CFS reported significantly more difficulty maintaining sleep than women with FM (p < .03)
Fatigue was the most commonly reported subjective feeling among all participants
Inferred Conclusions
Both FM and CFS are associated with clinically meaningful sleep disturbances
Clinicians should assess sleep quality rather than focusing solely on sleep duration in these populations
Sleep quality may be an important intervention target for reducing fatigue in CFS and FM
Further research is needed to understand the mechanisms linking sleep disturbances to fatigue in these conditions
Remaining Questions
What specific sleep architecture abnormalities (REM, deep sleep, etc.) are present in CFS versus FM?
Does treating sleep disturbances improve fatigue and other symptoms in CFS patients?
Why do CFS patients experience more sleep maintenance problems than FM patients despite similar fatigue levels?
What This Study Does Not Prove
This study cannot establish causation—it does not prove that poor sleep causes fatigue or vice versa. The small sample size (13 CFS patients) limits generalizability to the broader CFS population. The cross-sectional design captures only a single time point and cannot track how sleep and fatigue change over time.
Tags
Symptom:Unrefreshing SleepFatigue
Method Flag:PEM Not DefinedWeak Case DefinitionSmall SampleMixed Cohort