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J Eval Clin Pract. 2009 Oct;15(5):820-5. doi: 10.1111/j.1365-2753.2008.01102.x.

Responsiveness of the EQ-5D to HADS-identified anxiety and depression.

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1
School of Economics, University of Nottingham, Nottingham, UK. david.whynes@nottingham.ac.uk

Abstract

RATIONALE:

The use of generic measures of health-related quality of life enables cost effectiveness comparisons of different health care interventions to be made. Nevertheless, there exists a concern that generic instruments may be insufficiently sensitive to detect the differences or changes in outcome identified by condition-specific instruments. This paper compares the psychometric properties of the EQ-5D generic instrument with a widely used specific measure of distress, the Hospital Anxiety and Depression Scale (HADS).

METHOD:

The analysis was based on data obtained from a large sample of women (n = 3119) with low-grade cervical cytological abnormalities detected at routine screening. These women completed EQ-5D and HADS questionnaires at recruitment and at 12 months thereafter. We examined the strength of association between HADS-determined severity of distress and EQ-5D scores at recruitment and between changes in severity and in scores over time.

RESULTS:

A higher likelihood of HADS-identified anxiety and/or depression was associated with significantly lower EQ-5D index and visual analogue scores. Over time, the EQ-5D score rose significantly when the likelihood of an individual representing a HADS-defined anxiety and/or depression case decreased.

CONCLUSION:

We conclude that the EQ-5D has shown itself to be responsive to differing degrees of HADS-assessed distress, although generalization beyond the UK context requires further investigation.

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