Center for Outcomes Research and Economic Evaluation for Health (C2H), National Institute of Public Health, 2-3-6 Minami, Wako, Saitama, 351-0197, Japan.
Department of Biomedical Sciences, College of Life Sciences, Ritsumeikan University, 1-1-1 Noji-higashi, Kusatsu, Shiga, 525-8577, Japan.
Qual Life Res. 2019 Nov;28(11):3093-3105. doi: 10.1007/s11136-019-02238-1. Epub 2019 Jun 26.
This study aimed to assess psychometric properties of the Japanese version of the EQ-5D-Y (3 levels) with a focus on feasibility, reliability, and construct validity.
Respondents were recruited from the general populations of three cities in Japan. First, children and adolescents responded to the EQ-5D-Y and PedsQL by self-report. Parents were also asked to evaluate the health states of their children/adolescents using proxy versions of these questionnaires. Next, the EQ-5D-Y was mailed to their residence approximately 2 weeks later, and both children/adolescents and their parents responded to the questionnaire. Reliability was confirmed by self-report test-retest methods and a comparison of self-report responses with proxy responses. Spearman's correlation coefficients were calculated between responses to the EQ-5D-Y and both responses to and scores of the PedsQL in order to assess construct validity.
A total of 654 children/adolescents from aged 8 to 15 (median age: 11) responded to the questionnaires at both the first- and second-stage surveys. Test-retest agreement was sufficiently high and was influenced by age. Proxy test-retest results revealed that parents' responses were more reliable compared to the self-report results. Some correlations (|r| > 0.3) between items of the EQ-5D-Y and PedsQL were found. Meanwhile, no correlations were found between proxy responses to the EQ-5D-Y and self-report responses to the PedsQL.
The EQ-5D-Y demonstrates reliability and validity among children/adolescents and their parents in Japan. Construct validity of the EQ-5D-Y by self-report was confirmed through comparisons with the PedsQL. Proxy responses to the EQ-5D-Y were more reliable compared to the self-report results, but construct validity was not confirmed in the proxy version.
本研究旨在评估 EQ-5D-Y（3 水平）日本版的心理测量特性，重点关注可行性、可靠性和构念效度。
研究对象从日本三个城市的普通人群中招募。首先，儿童和青少年通过自我报告回答 EQ-5D-Y 和 PedsQL。父母还被要求使用这些问卷的代理版本来评估其子女/青少年的健康状况。接下来，大约在两周后将 EQ-5D-Y 邮寄到他们的住所，儿童/青少年及其父母都对问卷进行了回答。通过自我报告的测试-重测方法和自我报告与代理报告的比较来确认可靠性。为了评估构念效度，计算了对 EQ-5D-Y 的回答与对 PedsQL 的回答和得分之间的 Spearman 相关系数。
共有 654 名 8 至 15 岁（中位数年龄：11 岁）的儿童/青少年在第一和第二阶段的调查中都回答了问卷。测试-重测的一致性非常高，并且受年龄影响。代理测试-重测结果表明，与自我报告结果相比，父母的回答更可靠。在 EQ-5D-Y 的项目和 PedsQL 之间发现了一些相关性（|r| > 0.3）。同时，在 EQ-5D-Y 的代理回答与 PedsQL 的自我报告回答之间未发现相关性。
EQ-5D-Y 在日本的儿童/青少年及其父母中具有可靠性和有效性。通过与 PedsQL 的比较，自我报告的 EQ-5D-Y 的构念效度得到了证实。与自我报告结果相比，代理对 EQ-5D-Y 的回答更可靠，但在代理版本中未确认构念效度。
