An investigation into the psychometric properties of the Hospital Anxiety and Depression Scale in individuals with chronic fatigue syndrome. — CFSMEATLAS
An investigation into the psychometric properties of the Hospital Anxiety and Depression Scale in individuals with chronic fatigue syndrome.
McCue, P, Martin, Cr, Buchanan, T et al. · Psychology, health & medicine · 2003 · DOI
Quick Summary
Researchers tested a questionnaire called the Hospital Anxiety and Depression Scale (HADS) to see if it accurately measures anxiety and depression in people with ME/CFS. They found that while the questionnaire seems reliable overall, it doesn't work exactly as doctors expected—it measures three separate things rather than two. This means the tool may not be the best choice for screening anxiety and depression in ME/CFS patients without some changes.
Why It Matters
Many clinicians use the HADS to screen for anxiety and depression in ME/CFS patients, but this study reveals the tool may not function as intended in this population. Understanding these limitations is important for ensuring patients receive accurate assessments and appropriate mental health support without relying on potentially flawed screening tools.
Observed Findings
Internal reliability of HADS anxiety and depression subscales was acceptable in the CFS sample
A three-factor model provided significantly better statistical fit than the standard two-factor model
The traditional bi-dimensional structure of the HADS does not adequately represent the underlying construct in CFS populations
Web-based data collection was successfully used with 117 CFS participants
Inferred Conclusions
The HADS construct validity is fundamentally compromised when used with CFS patients
The instrument's clinical utility for screening anxiety and depression in CFS is questionable without revision
Future iterations or alternative instruments are needed for reliable mental health assessment in ME/CFS
The three-factor structure suggests different underlying dimensions of psychological distress in CFS compared to general medical populations
Remaining Questions
What specific items or factors are contributing to the three-factor structure instead of the expected two-factor structure?
Which alternative screening tools or revised versions of the HADS would be more valid for ME/CFS populations?
What This Study Does Not Prove
This study does not prove that anxiety and depression are absent in ME/CFS or that they are caused by the illness itself. It also does not establish which screening tools should replace the HADS, nor does it demonstrate that the underlying psychological experiences of patients differ—only that this particular questionnaire's structure doesn't fit CFS populations well.
Tags
Symptom:Fatigue
Method Flag:Weak Case DefinitionNo ControlsSmall Sample