Lovisenberg Diakonale Hospital, Oslo, Norway.
Psychiatry Res. 2013 Feb 28;205(3):241-6. doi: 10.1016/j.psychres.2012.08.031. Epub 2012 Sep 15.
This study examines the psychometric properties of the Lee Fatigue and Energy Scales (visual analog version) using a Rasch model application. The relationship between fatigue and energy is also described for a convenience sample of 102 women with human immunodeficiency virus/acquired immunodeficiency syndrome (HIV/AIDS) who completed the Lee Fatigue and Energy Scales in the morning and evening. Both scales were assessed for internal scale validity, unidimensionality, and uniform differential item functioning in relation to morning and evening ratings. Analyses confirmed that both the Fatigue and Energy Scales demonstrated evidence of internal scale validity and unidimensionality. Mean fatigue measures were also higher in the evening than in the morning and mean energy measures were higher in the morning than in the evening (both p<0.001), indicating that time of day is an important consideration. Fatigue and energy measures were moderately correlated with each other in the morning but not in the evening. The concepts of energy and fatigue were inversely related, but not polar opposites in this sample. Fatigue and energy may therefore be distinct constructs that should not be used interchangeably, either in measurement or when interpreting outcomes for research or clinical purposes.
本研究使用 Rasch 模型应用程序检验了 Lee 疲劳和能量量表（视觉模拟版本）的心理计量学特性。还描述了 102 名人类免疫缺陷病毒/获得性免疫缺陷综合征（HIV/AIDS）女性便利样本中疲劳和能量之间的关系，这些女性在早上和晚上完成了 Lee 疲劳和能量量表。这两个量表都评估了内部量表有效性、单维性以及与早晨和晚上评分相关的均匀差异项目功能。分析证实，疲劳和能量量表都具有内部量表有效性和单维性的证据。疲劳的平均测量值在晚上高于早上，而能量的平均测量值在早上高于晚上（均<0.001），这表明一天中的时间是一个重要的考虑因素。在早上，疲劳和能量测量值之间中度相关，但在晚上则不相关。在这个样本中，能量和疲劳的概念是相反的关系，但不是对立的关系。因此，疲劳和能量可能是不同的构建体，无论是在测量还是在解释研究或临床目的的结果时，都不应互换使用。
