Tokumasu Kazuki, Matsuki Nobuyoshi, Fujikawa Hirohisa, Sakamoto Yoko, Otsuka Fumio
Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan.
Department of Epidemiology, Medical School, Okayama University, Japan.
Intern Med. 2025 Mar 1;64(5):658-663. doi: 10.2169/internalmedicine.4101-24. Epub 2024 Jul 18.
Objective General fatigue is one of the most frequent chief complaints in primary care, and an accurate assessment of fatigue has a direct impact on a patient's quality of life and treatment decisions. The Fatigue Assessment Scale (FAS), a measure of general fatigue, is useful for assessing fatigue in diverse cultures and diseases. However, there has been no study showing the reliability and validity of the scale in the Japanese context. The present study assessed the reliability and validity of the Japanese version of the FAS. Methods This study was conducted on 649 patients with long COVID who had a high frequency of general fatigue. To test the structural validity of the FAS, the patients were randomly divided into two groups: one in which an exploratory factor analysis (EFA) was conducted and one in which a confirmatory factor analysis (CFA) was conducted. Cronbach's alpha was calculated to assess internal consistency reliability. Results As 58 patients had missing values, we analyzed the data of 591 patients. The EFA led to an FAS comprising two factors. The CFA showed an acceptable fit for this two-factor model. The internal consistency was found to be good (Cronbach's alpha =0.89). Conclusion This study verified the structural validity and internal consistency and reliability of the Japanese version of the FAS. The results indicate that the Japanese version of the FAS is useful for assessing general fatigue in patients with long COVID in Japan.
全身疲劳是基层医疗中最常见的主要症状之一，对疲劳进行准确评估直接影响患者的生活质量和治疗决策。疲劳评估量表（FAS）是一种用于测量全身疲劳的工具，在不同文化和疾病背景下评估疲劳都很有用。然而，尚无研究表明该量表在日本背景下的信效度。本研究评估了日语版FAS的信效度。方法：本研究对649例长期新冠患者进行，这些患者普遍存在全身疲劳。为检验FAS的结构效度，将患者随机分为两组：一组进行探索性因素分析（EFA），另一组进行验证性因素分析（CFA）。计算Cronbach's α系数以评估内部一致性信度。结果：由于58例患者存在缺失值，我们分析了591例患者的数据。EFA得出FAS由两个因素组成。CFA显示该两因素模型拟合良好。内部一致性良好（Cronbach's α =0.89）。结论：本研究验证了日语版FAS的结构效度、内部一致性和信度。结果表明，日语版FAS可用于评估日本长期新冠患者的全身疲劳。
