Schwartz A L
University of Utah College of Nursing, Salt Lake City, USA.
Oncol Nurs Forum. 1998 May;25(4):711-7.
PURPOSE/OBJECTIVES: To describe the psychometric development of the Schwartz Cancer Fatigue Scale (SCFS).
A multiphase instrumentation study describing construct and operational definitions, informal and formal content validity, reliability, and validity analysis.
Content validity established with 20 subjects. Reliability and validity evaluated with 166 subjects residing in diverse parts of the United States.
Eleven items that failed to show variance, had high interitem correlations, or failed to discriminate were eliminated. Factor analysis resulted in a four-factor solution that accounted for 70% of the variance. Cronbach's alpha for the total scale was estimated to be 0.96 and to be between 0.82 and 0.93 for the subscales.
The 28-item SCFS has demonstrated reliability and content and construct validity. Factor analysis supports the four subscales (physical, emotional, cognitive, and temporal). Preliminary construct validity has been demonstrated by differences in fatigue between those people who are currently receiving treatment and those who have completed treatment and by scores on a visual analogue scale of fatigue.
The SCFS may prove to be clinically relevant in assessing the effect of interventions to treat and manage cancer-related fatigue.
目的/目标：描述施瓦茨癌症疲劳量表（SCFS）的心理测量学发展情况。
一项多阶段仪器研究，描述结构和操作定义、非正式和正式的内容效度、信度以及效度分析。
通过20名受试者确定内容效度。通过166名居住在美国不同地区的受试者评估信度和效度。
剔除了11个未显示出变异性、项目间相关性高或无法进行区分的条目。因子分析得出一个四因子解决方案，该方案解释了70%的变异。总量表的克朗巴赫α系数估计为0.96，各分量表的克朗巴赫α系数在0.82至0.93之间。
28个条目的SCFS已证明具有信度、内容效度和结构效度。因子分析支持四个分量表（身体、情绪、认知和时间）。目前正在接受治疗的人群与已完成治疗的人群在疲劳方面的差异以及疲劳视觉模拟量表的得分，证明了初步的结构效度。
SCFS在评估治疗和管理癌症相关疲劳的干预措施的效果方面可能具有临床相关性。
