AmbuFlex/WestChronic, Occupational Medicine, Regional Hospital West Jutland, University Research Clinic, Aarhus University, Herning, Denmark.
Department of Rheumatology, Aarhus University Hospital, Aarhus, Denmark.
Health Qual Life Outcomes. 2018 Sep 6;16(1):175. doi: 10.1186/s12955-018-1001-0.
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.
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.
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.
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.
广泛应用于多个国家多种人群的通用问卷——世界卫生组织-5 项幸福感指数（WHO-5），用于衡量心理健康状况。该问卷已被证实具有充分的心理测量学特性；然而，其重测信度尚未得到确定。本研究旨在评估丹麦版 WHO-5 幸福感指数在癫痫门诊患者中的重测信度和测量误差。此外，本研究还评估了管理方式（网络、纸质或两者混合）是否会影响结果。
2016 年 8 月至 2017 年 4 月，从中丹麦大区的三个门诊招募了年龄≥15 岁的癫痫门诊患者。参与者被随机分为四个重测组：网络-网络、纸质-纸质、网络-纸质和纸质-网络。使用组内相关系数（ICC）评估重测信度，通过计算基于测量标准误差的最小可检测变化（MDC）评估测量误差。
共有 554 名患者在两个时间点完成了问卷。两次测试之间的平均间隔时间为 22 天。汇总的重测信度估计值 ICC 为 0.81（95%CI 0.78; 0.84）。估计的 MDC 为 23.60 分（95%CI 22.27; 25.10）。这些估计值在不同的管理方法之间变化不大。
在不同管理方式下，丹麦版 WHO-5 在癫痫门诊患者中表现出可接受的重测信度；然而，在评估 WHO-5 评分随时间的变化时，应考虑到相对较大的测量误差。应进一步研究以探索这些发现。
