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  • Title: Cross-cultural verification of the EORTC QLQ-C15-PAL questionnaire in mainland China.
    Author: Zhang L, Wang N, Zhang J, Liu J, Luo Z, Sun W, Woo SM, Chen C, Zhang K, Miller AR, Guo H, Zhang X, Wang C.
    Journal: Palliat Med; 2016 Apr; 30(4):401-8. PubMed ID: 26121985.
    Abstract:
    BACKGROUND: Simplified by European Organization for Research and Treatment of Cancer (EORTC) Quality-of-Life Questionnaire Core 30 (QLQ-C30), EORTC Quality-of-Life Questionnaire Core 15 Palliative Care (QLQ-C15-PAL) is specifically applied to evaluating palliative care patients' quality of life. AIM: This study examined cross-cultural adaptability and validity of QLQ-C15-PAL for evaluating quality of life of palliative care patients with advanced cancer in mainland China. PARTICIPANTS AND DESIGN: From May to October 2013, 243 palliative care patients in Tianjin Cancer Hospital completed the EORTC QLQ-C30. We extracted QLQ-C15-PAL data for analysis. Physicians completed the Eastern Cooperative Oncology Group Performance Status score and mental state assessment for each patient. RESULTS: A total of 243 patients completed the study. The compliance rate was high, with missing rate for each item ranging from 0% to 2.1%. In addition to emotional function, the remaining dimensions demonstrated a high reliability (Cronbach's alpha > 0.7). Whether we divided patients into two groups according to their Eastern Cooperative Oncology Group Performance Status or divided patients into three groups according to mental status, both sets of results showed significant differences in QLQ-C15-PAL subscale scores (p < 0.05), indicating that the QLQ-C15-PAL scale could be used to distinguish between the aforementioned subgroups. Overall quality of life was moderately correlated with fatigue (r = -0.406) but weakly correlated with other subscales. The proportion of variance (R(2)) ranged from 0.848 to 0.903, which showed that QLQ-C15-PAL subscale scores explained between 84.8% and 90.3% of the original QLQ-C30 score distribution. CONCLUSION: The Chinese version of the EORTC QLQ-C15-PAL questionnaire has high reliability and validity and is therefore suitable for clinical use in China to determine health-related quality of life in Chinese patients with advanced cancer.
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