[Prevalence of chronic fatigue syndrome in 4 family practices in Leiden].
Versluis, R G, de Waal, M W, Opmeer, C et al. · Nederlands tijdschrift voor geneeskunde · 1997
Quick Summary
Researchers in the Netherlands looked at how many people in general medical practices had chronic fatigue syndrome (CFS). They reviewed medical records from about 23,000 patients and found that at least 1-2 out of every 1,000 patients had CFS. Interestingly, they noticed that women were diagnosed with CFS about five times more often than men.
Why It Matters
This study provides early epidemiological data on CFS occurrence in general practice settings, helping establish disease burden in the community. Understanding prevalence is essential for healthcare planning and recognizing that CFS disproportionately affects women, which remains clinically relevant today.
Observed Findings
At least 1.1 cases of CFS per 1,000 patients in general practice population
Male-to-female ratio of 1:5 (approximately 83% female)
42 patients initially identified as potential CFS cases from 601 preselected patients
25 of 42 patients (60%) confirmed by their general practitioners as meeting Holmes' criteria
General practitioners used 10 different coding systems to label CFS-related conditions
Inferred Conclusions
CFS is a recognizable condition in primary care settings with a measurable, though possibly underestimated, prevalence
CFS shows marked female predominance, with women representing approximately 83% of cases
Diagnostic coding practices in general practice are inconsistent, potentially obscuring true prevalence
The actual prevalence may be higher than 1.1 per 1,000 due to underdiagnosis in primary care records
Remaining Questions
What is the true prevalence of CFS when using active case-finding methods rather than passive record review?
What biological or social factors account for the 5:1 female-to-male ratio in CFS?
What This Study Does Not Prove
This study does not prove what causes CFS or why it affects women more than men. It also cannot establish incidence (new cases) versus prevalence, and the reliance on medical record documentation means some undiagnosed cases in the community were likely missed.
Tags
Symptom:Fatigue
Method Flag:PEM Not DefinedWeak Case DefinitionSmall SampleExploratory Only