Limited evidence was found for the psychometric properties and clinical usability of these instruments .
However , the CFS-activities and participation question naire ( APQ ) is a disease-specific instrument with moderate content and construct validity .
PURPOSE To summarize measurement instruments used to evaluate activity limitations and participation restrictions in patients with chronic fatigue syndrome ( CFS ) and review the psychometric properties of these instruments .
Chronic fatigue syndrome causes activity limitations and participation restrictions in one or more areas of life .
Exercise performance and chronic pain in chronic fatigue syndrome: the role of pain catastrophizing.
OBJECTIVES This study aim ed to examine the associations between bodily pain , pain catastrophizing , depression , activity limitations /participation restrictions , employment status , and exercise performance in female patients with chronic fatigue syndrome ( CFS ) who experience widespread pain . DESIGN Cross-sectional observational study . SETTING A university-based clinic . PATIENTS Thirty-six female CFS patients who experienced widespread pain . OUTCOME MEASURES Patients filled in the  Medical Outcomes Short-Form 36 Health Status Survey ,  the  Chronic Fatigue Syndrome Activities and Participation Question naire , the Beck Depression Inventory , and the Pain Catastrophizing Scale , and underwent a maximal exercise stress test with continuous monitoring of electrocardiographic and ventilatory parameters . RESULTS Pain catastrophizing was related to bodily pain ( r = -0.70 ) , depression ( r = 0.55 ) , activity limitations /participation restrictions ( r = 0.68 ) , various aspects of quality of life ( r varied between -0.51 and -0.64 ) , and exercise capacity ( r varied between -0.41 and -0.61 ) . Based on hierarchical multiple regression analysis , pain catastrophizing accounted for 41 % of the variance in bodily pain in female CFS patients who experience chronic widespread musculoskeletal pain . Among the three subscale scores of the Pain Catastrophizing Scale , helplessness and rumination rather than magnification were strongly related to bodily pain . Neither pain catastrophizing nor depression was related to employment status . CONCLUSIONS These data provide evidence favoring a significant association between pain catastrophizing , bodily pain , exercise performance , and self-reported disability in female patients with CFS who experience widespread pain . Further prospect i ve longitudinal study ing of these variables is required
Limited evidence was found for the psychometric properties and clinical usability of these instruments .
However , the CFS-activities and participation question naire ( APQ ) is a disease-specific instrument with moderate content and construct validity .
PURPOSE To summarize measurement instruments used to evaluate activity limitations and participation restrictions in patients with chronic fatigue syndrome ( CFS ) and review the psychometric properties of these instruments .
Chronic fatigue syndrome causes activity limitations and participation restrictions in one or more areas of life .