Morriss R K, Wearden A J, Mullis R
Department of Community Psychiatry, University of Manchester, UK.
J Psychosom Res. 1998 Nov;45(5):411-7. doi: 10.1016/s0022-3999(98)00022-1.
The Chalder fatigue scale is widely used to measure physical and mental fatigue in chronic fatigue syndrome patients, but the constructs of the scale have not been examined in this patient sample. We examined the constructs of the 14-item fatigue scale in a sample of 136 chronic fatigue syndrome patients through principal components analysis, followed by correlations with measures of subjective and objective cognitive performance, physiological measures of strength and functional work capacity, depression, anxiety, and subjective sleep difficulties. There were four factors of fatigue explaining 67% of the total variance. Factor 1 was correlated with subjective everyday cognitive difficulties, concentration difficulties, and a deficit in paired associate learning. Factor 2 was correlated with difficulties in maintaining sleep. Factor 3 was inversely correlated with grip strength, peak VO2, peak heart rate, and peak functional work capacity. Factor 4 was correlated with interview and self-rated measures of depression. The results support the validity of mental and physical fatigue subscales and the dropping of the "loss of interest" item in the 11-item version of the fatigue scale.
查尔德疲劳量表被广泛用于测量慢性疲劳综合征患者的身心疲劳，但该量表的结构尚未在本患者样本中进行检验。我们通过主成分分析，在136名慢性疲劳综合征患者的样本中检验了14项疲劳量表的结构，随后将其与主观和客观认知表现的测量指标、力量和功能性工作能力的生理测量指标、抑郁、焦虑以及主观睡眠困难进行相关性分析。有四个疲劳因素解释了总方差的67%。因素1与日常主观认知困难、注意力集中困难以及配对联想学习缺陷相关。因素2与维持睡眠困难相关。因素3与握力、峰值摄氧量、峰值心率和峰值功能性工作能力呈负相关。因素4与访谈和自评抑郁量表相关。结果支持了身心疲劳分量表的有效性，以及在疲劳量表11项版本中删除“兴趣丧失”项目。
