Author Affiliations: Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences (Drs Orhan, Özgül and Akbayrak and Mss Üzelpasaci, Baran, and Nakip) and Cancer Institute (Dr Aksoy), Hacettepe University, Ankara, Turkey.
Cancer Nurs. 2020 Sep/Oct;43(5):375-383. doi: 10.1097/NCC.0000000000000709.
Health-related quality of life is measured to detect the influence of lymphedema on physical, functional, and social aspects of life in patients with breast cancer-related lymphedema (BCRL).
This study aimed to perform the psychometric evaluation of the Lymphedema Life Impact Scale (LLIS) in Turkish patients with BCRL.
Patients with BCRL (n = 78) filled out the Turkish LLIS, Lymphedema Quality of Life, European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core 30, and Quick Disability of Arm, Shoulder and Hand scales. Breast cancer survivors without BCRL (n = 35) completed only the Turkish LLIS. Psychometric properties were analyzed with the internal consistency, test-rest reliability, construct, criterion, and discriminant validity.
The internal consistency of the Turkish LLIS was strong (Cronbach's α coefficient >.70). Test-retest reliability was strong to very strong (intraclass correlation coefficients from 0.88 to 0.93; P < .001). Similar to the original structure of the scale, exploratory factor analysis identified 3 factors. Criterion validity was supported by moderate to strong correlations between the LLIS, Lymphedema Quality of Life, European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core 30, and quick Disability of Arm, Shoulder and Hand. There were significant differences in the total and subscale scores of the LLIS between participants with and without BCRL (P < .05).
The present study provided the evidence to confirm reliability and clinical validity of the Turkish LLIS.
The Turkish LLIS is a reliable and valid condition-specific scale to measure the physical, functional, and psychological aspects of health-related quality of life in patients with BCRL.
健康相关生活质量的衡量标准旨在检测乳腺癌相关淋巴水肿（BCRL）患者的身体、功能和社会生活方面的淋巴水肿的影响。
本研究旨在对土耳其 BCRL 患者的淋巴水肿生活影响量表（LLIS）进行心理计量学评估。
BCRL 患者（n=78）填写土耳其 LLIS、淋巴水肿生活质量量表、欧洲癌症研究与治疗组织生活质量问卷核心 30 量表和快速残疾上肢、肩部和手量表。无 BCRL 的乳腺癌幸存者（n=35）仅填写土耳其 LLIS。采用内部一致性、测试-重测信度、结构、标准和判别有效性对心理计量学特性进行分析。
土耳其 LLIS 的内部一致性很强（Cronbach's α系数>0.70）。测试-重测信度很强至很强（组内相关系数为 0.88 至 0.93；P<0.001）。与量表的原始结构相似，探索性因子分析确定了 3 个因子。LLIS、淋巴水肿生活质量量表、欧洲癌症研究与治疗组织生活质量问卷核心 30 量表和快速残疾上肢、肩部和手量表之间存在中度至强相关性，支持标准效度。LLIS 的总分和子量表评分在有和无 BCRL 的参与者之间存在显著差异（P<0.05）。
本研究提供了证据，证实了土耳其 LLIS 的可靠性和临床有效性。
土耳其 LLIS 是一种可靠和有效的特异性量表，可用于衡量 BCRL 患者健康相关生活质量的身体、功能和心理方面。
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