疲劳是影响乳腺癌患者身体、认知和情感领域最常见和最令人困扰的症状。慢性病功能评估疲劳量表（FACIT-F）已被广泛应用于慢性病患者，并显示出满意的信度和效度。本研究旨在探讨FACIT-F在中国乳腺癌患者中的心理测量学特性。使用便利抽样方法进行了横断面调查（2020年1月至2022年9月），从中国上海的两家三级医院招募了共597名患者，填写了人口统计信息问卷、FACIT-F和乳腺癌功能评估量表（FACT-B）。通过计算FACIT-F与FACT-B的皮尔逊相关系数，评估了收敛效度。通过检查不同年龄组（≤60岁和>60岁）的年龄间项目反差，评估了测量不变性。For reliability analysis, 内部一致性和分半信度可供测量。运用Rasch分析进行主成分分析，评估量表的单维度性。此外，进行了项目难度水平的Rasch分析，并使用项目-人员图。FACIT-F没有观察到底部/顶部效应。FACIT-F与FACT-B之间存在中等相关性（r = -0.342, p < 0.01）。大多数项目在年龄方面不存在不同项功能（DIF），除了一个项目。此外，FACIT-F显示了可接受的内部一致性。Rasch残差的主成分分析显示，FACIT-F的解释的方差比例为53.3％，项目的偏差均方统计值介于0.68至1.90之间，内聚MNSQ介于0.63至1.73之间。此外，发现项目与人员之间的回应是可以接受的。研究结果表明，FACIT-F的中文版是衡量乳腺癌患者疲劳程度的有效工具。© 2023. BioMed Central Ltd., 作为Springer Nature的一部分。

Fatigue is the most frequent and distressing symptom affecting the physical, cognitive, and affective domains of breast cancer patients. The Functional Assessment of Chronic Illness Therapy-Fatigue (FACIT-F) has been widely used in patients with chronic diseases and has shown satisfactory reliability and validity. This study aimed to examine the psychometric properties of the FACIT-F among Chinese patients with breast cancer.Using a convenience sampling method, a cross-sectional survey (January 2020 and September 2022) was used with patients recruited from two tertiary hospitals in Shanghai, Mainland China, and a total of 597 patients completed a demographic information questionnaire, the FACIT-F and the Functional Assessment of Cancer Therapy for Breast Cancer (FACT-B). Convergent validity was estimated by calculating the Pearson correlation coefficient of the FACIT-F with the FACT-B. Measurement invariance across age was performed by examining differential item functioning (DIF) across age groups (≤ 60 and > 60 years). The internal consistency and split-half reliability were performed for reliability analysis. Unidimensionality of the scale was evaluated by the principal component analysis by Rasch analysis. Additionally, Rasch analysis was performed for item difficulty levels, and an item-person map was used.No floor/ceiling effects were observed for the FACIT-F. Moderate correlations were found between FACIT-F and FACT-B (r = - 0.342, p < 0.01). Most items showed an absence of DIF regarding age, except for one item. In addition, the FACIT-F showed acceptable internal consistency. Principal component analysis of Rasch residuals showed that the proportion of variance explained by the FACIT-F was 53.3%, and the outfit mean square statistics for the items ranged from 0.68 to 1.90 and the infit MNSQ from 0.63 to 1.73. Additionally, an acceptable response between items and persons was found.The findings indicate that the Chinese version of the FACIT-F is a valid tool for the measurement of fatigue in breast cancer patients.© 2023. BioMed Central Ltd., part of Springer Nature.