The assessment of fatigue: Psychometric qualities and norms for the Checklist individual strength
The assessment of fatigue: Psychometric qualities and norms for the Checklist individual strength
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DOI：
10.1016/j.jpsychores.2017.05.007
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发表时间：
2017-07-01
影响因子：
4.7
通讯作者：
Knoop, H.
中科院分区：
文献类型：
--
作者：
Worm-Smeitink, M.;Gielissen, M.;Knoop, H.
目的：个人力量检查表（CIS）测量疲劳的四个维度：疲劳严重程度，集中问题，动机和活动减少。在疲劳严重程度分量表上，采用35分的分值。本研究1)调查了CIS的心理测量素质；2)验证严重疲劳的临界值，3)提供规范。方法：荷兰普通人群的代表（n = 2288）完成了CIS。采用探索性因子分析对因子结构进行研究。测定内部一致性和重测信度。通过将CIS与其他疲劳量表（Choker疲劳问卷、MOS Short form-36活力量表、EORTC QLQ-C30疲劳量表）相关联，对另外两个样本进行并发效度评估。为了验证疲劳严重程度临界值，对转介到慢性疲劳治疗中心的患者（n = 5243）和健康组（n = 1906）进行了受试者操作特征分析。计算一般人群、慢性疲劳综合征（CFS）患者（n = 1407）和8组其他疾病患者（n = 1411）的CIS亚量表规范得分。结果：复制了原CIS的四因子结构。量表的内部一致性（a = 0.84 ~ 0.95）和重测信度（r = 0.74 ~ 0.86）较高。与其他疲劳量表的相关性为中高。严重疲劳的35分临界值是合适的，但考虑到17%的假阳性率，CFS的研究应调整为40分。结论：CIS是一种有效和可靠的疲劳评估工具，对于严重疲劳具有有效的截止评分，可用于临床实践。
Objective: The Checklist Individual Strength (CIS) measures four dimensions of fatigue: Fatigue severity, concentration problems, reduced motivation and activity. On the fatigue severity subscale, a cut-off score of 35 is used. This study 1) investigated the psychometric qualities of the CIS; 2) validated the cut-off score for severe fatigue and 3) provided norms.Methods: Representatives of the Dutch general population (n = 2288) completed the CIS. The factor structure was investigated using an exploratory factor analysis. Internal consistency and test-retest reliability were determined. Concurrent validity was assessed in two additional samples by correlating the CIS with other fatigue scales (Choker Fatigue Questionnaire, MOS Short form-36 Vitality subscale, EORTC QLQ-C30 fatigue subscale).To validate the fatigue severity cut-off score, a Receiver Operating Characteristics analysis was performed with patients referred to a chronic fatigue treatment centre (n = 5243) and a healthy group (n = 1906). Norm scores for CIS subscales were calculated for the general population, patients with chronic fatigue syndrome (CFS; n = 1407) and eight groups with other medical conditions (n = 1411).Results: The original four-factor structure of the CIS was replicated. Internal consistency (a = 0.84-0.95) and test-retest reliability (r = 0.74-0.86) of the subscales were high. Correlations with other fatigue scales were moderate to high. The 35 points cut-off score for severe fatigue is appropriate, but, given the 17% false positive rate, should be adjusted to 40 for research in CFS.Conclusion: The CIS is a valid and reliable tool for the assessment of fatigue, with a validated cut-off score for severe fatigue that can be used in clinical practice.