Psychometric properties of the Japanese version of the quality of life-Cancer Survivors Instrument |
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Authors: | Maiko Fujimori Makoto Kobayakawa Naoki Nakaya Kanji Nagai Yutaka Nishiwaki Masatoshi Inagaki Yosuke Uchitomi |
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Institution: | (1) Psycho-Oncology Division, Research Center for Innovative Oncology, National Cancer Center Hospital East, Kashiwa, Chiba, Japan;(2) Division of Epidemiology, Department of Public Health and Forensic Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan;(3) Thoracic Oncology Division, National Cancer Center Hospital East, Kashiwa, Chiba, Japan;(4) Psycho-Oncology Division, Research Center for Innovative Oncology, National Cancer Center Hospital East, Kashiwanoha 6-5-1, Kashiwa, Chiba 277-8577, Japan |
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Abstract: | The purpose of this study was to describe the psychometric properties of the Japanese version of the Quality of Life-Cancer
Survivors Instrument (QOL-CS-J) developed in the U.S. This study was conducted as a mail survey to survivors of more than
5 years post curative resection for non-small-cell lung cancer (NSCLC) and who had participated in an earlier survey. This
survey included the medical and demographic factors, the QOL-CS scores, and the Medical Outcome Study 36-Item Short Form (SF-36).
A total of 113 survivors completed the survey. To confirm the reliability, the Cronbach’s α coefficient of each subscale was
calculated as an internal consistency (α = 0.65–0.89). To confirm the validity of the trial as conducted, Pearson’s correlation
coefficients between the subscales of the QOL-CS and the subscales of the SF-36 were calculated. There were moderate correlations
between associated subscales including QOL-CS physical to SF-36 bodily pain (r = 0.45) and vitality (r = 0.52), QOL-CS psychological to SF-36 mental health (r = 0.55), QOL-CS social to SF-36 general health perception (r = 0.31) and mental health (r = 0.47), and QOL-CS total to each subscale of SF-36 (r = 0.25–0.64). Findings demonstrated that the QOL-CS-J adequately measured the QOL in long-term NSCLC survivors. |
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Keywords: | Japan Non-small-cell lung cancer Reliability The Quality of Life-Cancer Survivors Instrument Validity |
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