Untitled

Abstract

Validity and reliability of a Singaporean English EQ-5D self-report questionnaire (EQ-5D) were evaluated among consecutive outpatients with rheumatic diseases attending a tertiary referral hospital in Singapore (a multi-ethnic, urban Asian country). Subjects were interviewed twice within a 2-week period using a standardized questionnaire containing the EQ-5D, Short Form 36 Health Survey (SF-36) and assessing demographic and psychosocial characteristics. To assess validity of the EQ-5D, 13 hypotheses relating responses to EQ-5D dimension/Visual Analogue Scale (EQ-VAS) to SF-36 scores or other variables were examined using the Mann-Whitney test, Kruskal-Wallis test, or Spearman's correlation coefficient. Test-retest reliability was assessed using Cohen's kappa. Sixty-six subjects were studied (osteoarthritis: 9, rheumatoid arthritis: 26, systemic lupus erythematosus: 23, spondyloarthropathy: 8; female: 72.7%; mean age: 44.3 years). Ten of 13 a-priori hypotheses relating EQ-5D responses to external variables were fulfilled, supporting the validity of the EQ-SD. Cohen's kappa for test-retest reliability (n = 52) ranged from 0.29 to 0.61. The Singaporean English EQ-5D appears to be valid in measuring quality of life in Singaporeans with rheumatic diseases; however, its reliability requires further investigation. These data provide a basis for further studies assessing the validity of the EQ-5D in Singapore.

The validity and reliability of the Arabic version of the EQ-5D: a study from Jordan

“…We also found evidence to support test-retest reliability of the EQ-5D self-classifier, with Cohen's κ being moderate to perfect (0.48-1.0). The κ values in our study were in general better than those reported in previous studies of subjects after stroke using EQ-5D (Cohen's κ: 0.63-0.80, 3-week, n=234)16 and in those with rheumatic diseases (Cohen's κ: 0.29-0.61, 1-week, n=52) 3. The significant and reasonably high intraclass correlation coefficient obtained in the EQ-VAS reliability study (0.78) demonstrates that the EQ-VAS is a feasible measure of self-reported health.…”

“…Applicable to a wide range of health conditions and treatments, it provides a simple descriptive profile and a single index value for health status. The EQ-5D is now available in most major languages with cultural adaptations 1–3. There are no published reports on the acceptability and psychometric properties of the EQ-5D iin the Arabic language, which is the first language for more than 300 million people.…”

Patients undergoing subacute rehabilitation have accurate expectations of their health-related quality of life at discharge

“…There is also a substantial volume of evidence supporting various aspects of its reliability [22,27,31,32,34]. Empirical investigations have also demonstrated that the EQ-5D has sound sensitivity to change [35-39].…”

Mapping the eight-item Parkinson’s Disease Questionnaire (PDQ-8) to the EQ-5D utility index

“…The Singaporean English EQ-5D differs from the original English version only in the visual analog scale (VAS) instructions [20]. The Singaporean Chinese EQ-5D had earlier been adapted for use in Singapore following the EuroQol Group's cultural adaptation guidelines [21].…”