Department of Biobehavioral Nursing Science, College of Nursing, University of Illinois at Chicago, Chicago, IL, USA.
University of Illinois Cancer Center, Chicago, IL, USA.
Health Qual Life Outcomes. 2021 Jul 12;19(1):179. doi: 10.1186/s12955-021-01815-8.
Fatigability has recently emerged in oncology as a concept that anchors patients' perceptions of fatigue to defined activities of specified duration and intensity. This study aimed to examine the psychometric properties of the Korean version of the Pittsburgh Fatigability Scale (K-PFS) for women with breast cancer.
This cross-sectional study involved 196 women with breast cancer recruited from a tertiary hospital in Seoul, Korea. Reliability was evaluated using Cronbach's alpha, and confirmatory factor analysis was conducted to examine the factor structure of the K-PFS. Four goodness-of-fit values were evaluated: (1) the comparative fit index (CFI), (2) the Tucker-Lewis index (TLI), (3) the root mean square error of approximation (RMSEA), and (4) the standardized root mean square residual (SRMR).
Of the 196 survivors, 71.1% had greater physical fatigability (K-PFS Physical score ≥ 15) and 52.6% had greater mental fatigability (K-PFS Mental score ≥ 13). The Cronbach's alpha coefficient for the total K-PFS scale was 0.926, and the coefficients for the physical and mental fatigability domains were 0.870 and 0.864, respectively. In the confirmatory factor analysis for physical fatigability, the SRMR value (0.076) supported goodness of fit, but other model fit statistics did not (CFI = 0.888, TLI = 0.826, and RMSEA = 0.224). For mental fatigability, although three goodness-of-fit values were acceptable (CFI = 0.948, TLI = 0.919, and SRMR = 0.057), the RMSEA value (0.149) did not indicate good model fit. However, each item coefficient was statistically significant (> 0.5), and the K-PFS was therefore found to be valid from a theoretical perspective.
This study provides meaningful information on the reliability and validity of the K-PFS instrument, which was developed to meet an important need in the context of breast cancer survivors. Additional research should examine its test-retest reliability and construct validity with performance measures.
疲劳感最近在肿瘤学领域成为一个概念，它将患者对疲劳的感知锚定在特定持续时间和强度的特定活动上。本研究旨在检验韩国版匹兹堡疲劳量表（K-PFS）在乳腺癌女性患者中的心理测量学特性。
本横断面研究纳入了 196 名来自韩国首尔一家三级医院的乳腺癌女性患者。采用 Cronbach's alpha 评估信度，采用验证性因子分析检验 K-PFS 的因子结构。评估了四个拟合优度值：（1）比较拟合指数（CFI），（2）Tucker-Lewis 指数（TLI），（3）近似均方根误差（RMSEA），以及（4）标准化均方根残差（SRMR）。
在 196 名幸存者中，71.1%的人表现出更大的身体疲劳感（K-PFS 身体评分≥15），52.6%的人表现出更大的精神疲劳感（K-PFS 精神评分≥13）。K-PFS 总分的 Cronbach's alpha 系数为 0.926，身体和精神疲劳感领域的系数分别为 0.870 和 0.864。在身体疲劳感的验证性因子分析中，SRMR 值（0.076）支持拟合优度，但其他模型拟合统计数据则不然（CFI=0.888，TLI=0.826，和 RMSEA=0.224）。对于精神疲劳感，虽然三个拟合优度值是可以接受的（CFI=0.948，TLI=0.919，和 RMSEA=0.057），但 RMSEA 值（0.149）则表明模型拟合不佳。然而，每个项目系数均具有统计学意义（>0.5），因此从理论角度来看，K-PFS 是有效的。
本研究为 K-PFS 工具的信度和效度提供了有意义的信息，该工具是为满足乳腺癌幸存者的重要需求而开发的。应开展进一步的研究，以检验其与绩效指标的重测信度和结构效度。
