Faculty of Medicine, University of Tsukuba, Tsukuba, Japan.
Department of Nursing, Faculty of Health Science Technology, Bunkyo Gakuin University, Tokyo, Japan.
Res Nurs Health. 2020 Apr;43(2):176-185. doi: 10.1002/nur.22011. Epub 2020 Jan 27.
This study was designed to evaluate the psychometric properties of the newly completed Japanese translation of the Ferrans and Powers Quality of Life Index Cancer Version III (QLI). Using a cross-sectional descriptive design, 136 ambulatory patients with gastrointestinal cancer (55 receiving chemotherapy, 76 with stable health status after treatment, and five status not known) completed a questionnaire at a one-time point, and 26 patients (stable health status) completed the questionnaire again 2 weeks later. Internal consistency reliability was supported by Cronbach's α of .96 for the total scale, with subscales ranging from .83 to .93. A test-retest correlation of 0.76 (total scale) provided evidence of stability reliability over a 2-week period, with subscale retest correlations ranging from 0.70 to 0.83. Confirmatory factor analysis showed the same four domains for the Japanese translation as the original QLI, supporting construct validity. We also assessed construct validity by examining the relationships between the Japanese QLI and six other concepts known to be related to the quality of life. As hypothesized, all correlations were moderate and in the expected direction (pain -0.39, anxiety -0.54, depression -0.63, stress -0.51, pain interfering with functioning -0.52, and general health 0.62). This evidence of the reliability and validity of the Japanese translation of the QLI supports its use in research and clinical practice to evaluate the impact of cancer and treatment. This new translation can be used to assess the patient's perspective of their quality of life, both within Japan and in cross-cultural studies with the QLI in other languages.
本研究旨在评估新完成的简中版费兰斯和鲍尔斯癌症生命质量指数第三版（QLI）的心理测量学特性。采用横断面描述性设计，136 名胃肠道癌症门诊患者（55 名接受化疗，76 名治疗后健康状况稳定，5 名健康状况未知）在一个时间点完成了一份问卷，26 名（健康状况稳定）患者在 2 周后再次完成了问卷。总量表的 Cronbach's α 为.96，支持内部一致性信度，子量表范围为.83 至.93。2 周期间重测相关性为 0.76（总量表），为稳定性信度提供了证据，子量表重测相关性范围为 0.70 至 0.83。验证性因子分析表明，日本翻译版与原始 QLI 具有相同的四个领域，支持结构效度。我们还通过检查日本 QLI 与其他六个已知与生活质量相关的概念之间的关系来评估结构效度。正如假设的那样，所有相关性均为中度且方向一致（疼痛 -0.39，焦虑 -0.54，抑郁 -0.63，压力 -0.51，疼痛影响功能 -0.52，一般健康状况 0.62）。QLI 日本译本的可靠性和有效性的这一证据支持其在研究和临床实践中用于评估癌症和治疗的影响。这种新的翻译可以用于评估患者对其生活质量的看法，无论是在日本还是在其他语言的 QLI 跨文化研究中。
