12/8/2022 0 Comments Chalder fatigue scale pdf![]() Jason, Najar, Porter, and Reh (2009) found that 38% of those with a diagnosis of MDD were misclassified as having CFS using the CDC empiric CFS case definition (Reeves et al.). In addition, reduced activity scale items refer to issues that a person with depression might easily endorse.įor example, a person would meet the fatigue criterion if they stated that the following two items were entirely true: "I get little done," and "I think I do very little in a day." It is likely that most individuals with major depressive disorder (MDD) would meet this reduced activity criterion. However, in one study of three groups with CFS, the mean MFI general fatigue scores ranged from 18.3 to 18.8 (Tiersky, Matheis, DeLuca, Lange, & Natelson, 2003), clearly higher than the Reeves et al. define severe fatigue as a score of greater than or equal to 13 on the MFI general fatigue subscale or greater than or equal to 10 on the MFI reduced activity subscale. The CDC's empiric CFS case definition (Reeves et al., 2005) assesses fatigue using the Multidimensional Fatigue Inventory (MFI) (Smets, Garssen, Bonke, & DeHaes, 1995), a 20-item instrument consisting of several subscales including general fatigue and reduced activity. definition, the Centers for Disease Control and Prevention (CDC) developed an empiric case definition for CFS that involves assessment of symptoms, disability, and fatigue with standardized instruments and specific cutoff points (Reeves et al., 2005). Partially in response to these problems with operationalizing the Fukuda et al. For example, these criteria do not specify how to assess fatigue severity or the presence of persisting or recurring fatigue for a period of 6 or more months. requirements have been criticized as lacking operational definitions and guidelines for accurate identification of CFS cases (Jason, King, et al., 1999 Reeves et al., 2003). This case definition requires an individual to experience six or more months of persisting or recurring chronic fatigue and the co-occurrence of four of eight additional core symptoms. (1994) CFS case definition is the currently accepted case definition internationally, although there is no available "gold standard" to assess fatigue severity. The present investigation consists of two distinct studies, both of which employ samples of individuals with CFS and controls, and to assess the effectiveness of several well-known fatigue instruments in discriminating between these two groups by utilizing Receiver Operating Characteristic (ROC) curve analyses. There have been relatively few studies assessing the sensitivity and specificity of fatigue scales that are frequently used to identify individuals with chronic fatigue syndrome (CFS) and differentiate them from healthy controls. ![]()
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