Doctoral Program in Nursing Science, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Japan.
Health Innovation and Nursing, Institute of Medicine, University of Tsukuba, Tsukuba, Japan.
Res Nurs Health. 2023 Oct;46(5):527-537. doi: 10.1002/nur.22334. Epub 2023 Aug 18.
The objective of this study was to translate the Ferrans and Powers Quality of Life Index (QLI) into the Indonesian language, considering its cultural and functional appropriateness, and to evaluate its psychometric properties by testing the reliability and validity. A committee approach was conducted to create the Indonesian version of the QLI (QLI-Id) and cognitive interviewing with 15 patients with cancer was conducted to identify potential problems or errors in answering the QLI-Id. A cross-sectional descriptive study was carried out using 236 responses to the QLI-Id questionnaire from patients with cancer; 62 of whom completed the same questionnaire twice within a 3-week interval to verify stability reliability. Confirmatory factor analysis results supported construct validity with model fit statistics for the original single-factor and four-factor structure of the QLI (corresponding to the QLI's total score and four subscale scores, respectively) with some rearrangement of the items within each subscale. Reliability for the total QLI-Id scale was supported by McDonald's Omega of 0.92 and the intraclass/intrasubject correlation coefficient at two time points of 0.86. The strong correlation between the QLI-Id total and the Satisfaction with Life Scale scores and the overall health/QOL domain of the EORTC QLQ-C30 (both r = 0.73) supported its construct validity. This study provides evidence for the reliability and validity of the QLI-Id as an instrument to measure the impact of cancer on the overall QOL of Indonesian patients.
本研究旨在将 Ferrans 和 Powers 生活质量指数（QLI）翻译成印度尼西亚语，考虑其文化和功能适宜性，并通过测试可靠性和有效性来评估其心理测量学特性。采用委员会方法创建了印度尼西亚版的 QLI（QLI-Id），并对 15 名癌症患者进行了认知访谈，以确定回答 QLI-Id 时可能存在的问题或错误。采用横断面描述性研究方法，对 236 名癌症患者的 QLI-Id 问卷进行了调查；其中 62 名患者在 3 周内两次完成了相同的问卷，以验证稳定性可靠性。验证性因子分析结果支持结构效度，QLI 的原始单因素和四因素结构（分别对应于 QLI 的总分和四个分量表得分）的模型拟合统计数据具有一定的项目重新排列。QLI-Id 总量的可靠性得到了 McDonald 欧米茄系数为 0.92 和两个时间点的内类/主体间相关系数为 0.86 的支持。QLI-Id 总分与生活满意度量表评分和 EORTC QLQ-C30 的整体健康/生活质量域之间的强烈相关性（均 r=0.73）支持其结构效度。本研究为 QLI-Id 作为一种衡量印度尼西亚癌症患者整体生活质量影响的工具的可靠性和有效性提供了证据。
