Format

Send to

Choose Destination
Health Qual Life Outcomes. 2018 Sep 6;16(1):175. doi: 10.1186/s12955-018-1001-0.

Test-retest reliability and measurement error of the Danish WHO-5 Well-being Index in outpatients with epilepsy.

Author information

1
AmbuFlex/WestChronic, Occupational Medicine, Regional Hospital West Jutland, University Research Clinic, Aarhus University, Herning, Denmark. livschou@rm.dk.
2
Department of Rheumatology, Aarhus University Hospital, Aarhus, Denmark.
3
Department of Clinical Medicine, Aarhus University, Aarhus, Denmark.
4
Psychiatric Research Unit, Psychiatric Centre North Zealand, University of Copenhagen, Hillerød, Denmark.
5
AmbuFlex/WestChronic, Occupational Medicine, Regional Hospital West Jutland, University Research Clinic, Aarhus University, Herning, Denmark.
6
Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus, Denmark.
7
Department of Occupational Medicine, Regional Hospital West Jutland, University Research Clinic, Herning, Denmark.

Abstract

BACKGROUND:

The generic questionnaire WHO-5 Well-being Index (WHO-5), which measures the construct of mental well-being has been widely used in several populations across countries. The questionnaire has demonstrated sufficient psychometric properties; however, the test- retest reliability of the WHO-5 scale has yet to be determined. The aim of this study was to evaluate the test-retest reliability and measurement error of the Danish WHO-5 Well-being Index for outpatients with epilepsy. A further aim was to evaluate whether the method of administration (web, paper, or a mixture of the two modalities) influenced the results.

METHODS:

Epilepsy outpatients aged ≥15 years from three outpatient clinics in Central Denmark Region were included from August 2016 to April 2017. The participants were randomly divided into four test-retest groups: web-web, paper-paper, web-paper, and paper-web. Test-retest reliability was assessed by intraclass correlation coefficients (ICC) and measurement error by calculating minimal detectable change (MDC) on the basis of the standard error of the measurement.

RESULTS:

A total of 554 patients completed the questionnaire at two time points. The median duration between test-retest was 22 days. The pooled test-retest reliability estimate was ICC 0.81 (95% CI 0.78; 0.84). The estimated MDC was 23.60 points (95% CI 22.27; 25.10). These estimates showed little variation across administration methods.

CONCLUSIONS:

WHO-5 showed acceptable test-retest reliability in a Danish epilepsy outpatient population across different method of administration; however, the relatively large measurement error should be taken into account when evaluating changes in WHO-5 scores over time. Further research should be done to explore these findings.

KEYWORDS:

Patient reported outcome measures; Reproducibility of results; Validation studies as topic

PMID:
30189867
PMCID:
PMC6127948
DOI:
10.1186/s12955-018-1001-0
[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for BioMed Central Icon for PubMed Central
Loading ...
Support Center