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 .
Kinesiophobia in chronic fatigue syndrome: assessment and associations with disability.
OBJECTIVES To investigate aspects of the validity of the total scores of the Tampa Scale for Kinesiophobia ( TSK ) , Dutch Version , which was modified to make it an appropriate question naire for the assessment of kinesiophobia ( fear of movement ) in chronic fatigue syndrome ( CFS ) patients ( the Dutch TSK-CFS ) , and , using this assessment tool , to examine the associations between kinesiophobia , exercise capacity , and activity limitations and participation restrictions in patients with CFS . DESIGN Prospect i ve observational studies . SETTING An outpatient fatigue clinic . PARTICIPANTS In the first study , 40 patients fulfilling the 1994 US Centers for Disease Control and Prevention ( CDC ) criteria for CFS were enrolled . The sample of the second study consisted of 51 CDC-defined patients with CSF . INTERVENTIONS Not applicable . Main outcome measures Study 1 : Subjects completed a set of question naires ; the Utrechtse Coping List ( UCL ) , the Dutch TSK-CFS , and the Dutch Baecke Question naire of Habitual Physical Activity . Study 2 : All patients completed 2 question naires (  Chronic Fatigue Syndrome Activities and Participation Question naire [ CFS-APQ ] , Dutch TSK-CFS ) and performed a maximal exercise stress test on a bicycle ergometer . The heart rate was monitored continuously by use of an electrocardiograph .  Metabolic and ventilatory parameters were measured through spirometry . RESULTS Study 1 : The Cronbach alpha coefficient for the individual item scores on the TSK-CFS was .80 . The total scores on the Dutch TSK-CFS showed a statistically significant correlation with both the avoidance/abide subscale of the UCL ( Spearman rho=.35 , P=.029 ) and the total score of the Baecke Question naire ( rho=-.45 , P=.004 ) . Study 2 : The total scores on the Dutch TSK-CFS showed a statistically significant correlation with the total scores on the CFS-APQ ( rho=.39 , P=.004 ) . No statistically significant associations were observed between the exercise capacity parameters and the total scores on the Dutch TSK-CFS . CONCLUSIONS These results provide evidence for the internal consistency and the convergent and congruent validity of the scores obtained by use of the Dutch TSK-CFS . Kinesiophobia appears to be associated with activity limitations /participation restrictions but not with exercise capacity in patients with CFS
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 .