E3 PreliminaryModerate confidencePEM not requiredMethods-PaperPeer-reviewedMachine draft
The Hebrew version of the FibroFatigue scale: validation of a questionnaire for assessment of fibromyalgia and chronic fatigue syndrome.
Ablin, Jacob N, Odes, Lisa, Neumann, Lily et al. · Rheumatology international · 2010 · DOI
Quick Summary
This study tested whether a Hebrew-language questionnaire called the FibroFatigue Scale (FFS) accurately measures symptoms in fibromyalgia patients. Researchers gave 100 patients with fibromyalgia this questionnaire along with other standard symptom-measuring tools, and found that the FFS reliably detected and measured how severe their symptoms were.
Why It Matters
Having validated assessment tools in multiple languages is critical for consistent symptom measurement across populations and for enabling international research collaboration. This Hebrew version expands access to reliable symptom measurement for Hebrew-speaking patients with fibromyalgia and related conditions like ME/CFS.
Observed Findings
- Internal consistency (Cronbach's alpha) for the overall FFS was 0.89, indicating strong reliability.
- Test-retest reliability for individual FFS items ranged from 0.46 to 0.85.
- Significant correlations were found between FFS items and SF-36 subscales, supporting construct validity.
- Mean disease duration in participants was 10.7 years; mean age was 53.5 years.
Inferred Conclusions
- The Hebrew FFS is a reliable and valid tool for detecting and measuring symptom severity in Hebrew-speaking fibromyalgia patients.
- The scale's strong internal consistency and correlations with established outcome measures (FIQ, SF-36) support its use in clinical and research settings.
- Translation of the FFS into Hebrew expands its utility for assessment in Hebrew-speaking populations.
Remaining Questions
- Is the FFS equally valid and sensitive for ME/CFS patients, or does it miss ME/CFS-specific features like post-exertional malaise?
- What accounts for the variability in test-retest reliability across individual FFS items (0.46–0.85)?
- How does the Hebrew FFS perform in longitudinal studies tracking symptom changes over time?
What This Study Does Not Prove
This study validates the FFS only in fibromyalgia; it does not establish whether the scale is equally valid for ME/CFS patients or whether it captures distinct ME/CFS-specific symptoms like post-exertional malaise. The study also does not establish whether the FFS can identify underlying biological mechanisms—only that it reliably measures symptom severity.
Tags
Symptom:PainFatigue
Method Flag:Weak Case DefinitionNo ControlsExploratory Only
Metadata
- DOI
- 10.1007/s00296-009-1122-1
- PMID
- 19779725
- Review status
- Machine draft
- Evidence level
- Early hypothesis, preprint, editorial, or weak support
- Last updated
- 8 April 2026
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →
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