Fatigue in child chronic health conditions: a systematic review of assessment instruments.
Crichton, Alison, Knight, Sarah, Oakley, Ed et al. · Pediatrics · 2015 · DOI
Quick Summary
Fatigue is a major problem for children with chronic illnesses, but doctors use many different tools to measure it. This review looked at 20 different fatigue assessment tools used in 89 studies across 14 health conditions, including ME/CFS and cancer. The researchers found that only two tools were truly reliable and could be used across different conditions, and more research is needed to better measure fatigue in younger children.
Why It Matters
For ME/CFS patients and researchers, this review is important because it identifies and evaluates the fatigue measurement tools available for pediatric ME/CFS populations and highlights the significant gap in validated assessment instruments. Understanding which tools are reliable helps clinicians and researchers better measure treatment response and disease severity in children with ME/CFS. The finding that most instruments lack strong evidence suggests urgent need for improved fatigue assessment tools specifically designed for ME/CFS in children.
Observed Findings
Twenty fatigue assessment instruments were identified across 89 studies evaluating 14 chronic health conditions
Cancer and chronic fatigue syndrome were the most common conditions studied
Twelve instruments were child self-report, seven were parent-report, and one was staff-report
Only two instruments demonstrated strong measurement properties for use across diverse health conditions
Overall quality of evidence for measurement properties of fatigue instruments was low
Inferred Conclusions
Evidence for fatigue assessment instrument reliability varies significantly by population studied and informant type
Current available tools are inadequate for comprehensive fatigue evaluation in most pediatric chronic conditions
Additional research is urgently needed to develop and validate fatigue assessment instruments for younger children and specific health conditions including ME/CFS
Remaining Questions
Which two instruments demonstrated strong measurement properties, and are they applicable to ME/CFS populations specifically?
Why is the evidence quality low for most instruments—is this due to methodological limitations in validation studies or inherent limitations of the instruments themselves?
What This Study Does Not Prove
This review does not establish causation or mechanisms of fatigue in any condition—it only examines assessment tools, not why fatigue occurs or how to treat it. It does not prove that any particular fatigue instrument is superior for ME/CFS specifically, only that evidence quality is generally low across conditions. The review's focus on children under 18 means findings do not generalize to adult populations with ME/CFS.
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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How should fatigue assessment differ in younger versus older children, and what age-appropriate tools are needed for preschool and early school-age children?
Are parent-report and child-report fatigue measures capturing the same construct, or do they measure different aspects of fatigue experience?