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The Parkinson fatigue scale: an evaluation of its validity and reliability in Greek Parkinson's disease patients.

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Title: The Parkinson fatigue scale: an evaluation of its validity and reliability in Greek Parkinson's disease patients.
Authors: Dagklis, Ioannis E. (AUTHOR), Tsantaki, Efthymia (AUTHOR), Kazis, Dimitrios (AUTHOR), Theodoridou, Varvara (AUTHOR), Papagiannopoulos, Sotirios (AUTHOR), Ntantos, Dimitrios (AUTHOR), Bostantjopoulou, Sevasti (AUTHOR)
Source: Neurological Sciences. Apr2019, Vol. 40 Issue 4, p683-690. 8p. 4 Charts.
Subjects: Parkinson's disease, Fatigue (Physiology), Cronbach's alpha, Statistical reliability, Test validity, Parkinson's disease diagnosis, Health surveys, Psychometrics, Questionnaires, Research evaluation, Severity of illness index, Disease complications, Equipment & supplies
Geographic Terms: Greece
Abstract: Objective: Fatigue is one of the most frequent and important nonmotor symptoms of patients with Parkinson disease (PD), affecting quality of life. Although, in some cases, it may be a severe and debilitating complaint, it remains relatively unexplored. The PFS-16 is a fatigue measure, specifically designed for PD patients. The aim of this study was to investigate the psychometric properties of Parkinson fatigue scale (PFS-16) in Greek PD patients.Methods: In total, 99 patients with PD were assessed. The following psychometric properties were tested: data quality, floor/ceiling effects, reliability (internal consistency, test-retest reliability), and construct validity. Construct validity was evaluated by examining correlations with other variables including other fatigue measures such as Fatigue Severity Scale (FSS) and the vitality scale (SF-VT) of SF-36. Moreover, assumptions were explored about "known" groups concerning fatigue.Results: The mean score for the PFS-16 was 2.95 (± 0.91); acceptability was good with negligible floor and ceiling effects. Results showed high internal consistency (Cronbach's alpha, 0.96) and test-retest reliability (ICC, 0.93). Strong correlations were observed between the PFS-16 and other fatigue (FFS and SF-VT) measures (rs = 0.77 and - 0.70, p < 0.001), revealing appropriate validity. Furthermore, predictions for "known" groups validity were verified.Conclusion: The Greek version of the PFS-16 showed satisfactory reliability and validity and thus can be regarded as a useful tool in assessing fatigue in PD. [ABSTRACT FROM AUTHOR]
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Database: Psychology and Behavioral Sciences Collection
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Abstract:<bold>Objective: </bold>Fatigue is one of the most frequent and important nonmotor symptoms of patients with Parkinson disease (PD), affecting quality of life. Although, in some cases, it may be a severe and debilitating complaint, it remains relatively unexplored. The PFS-16 is a fatigue measure, specifically designed for PD patients. The aim of this study was to investigate the psychometric properties of Parkinson fatigue scale (PFS-16) in Greek PD patients.<bold>Methods: </bold>In total, 99 patients with PD were assessed. The following psychometric properties were tested: data quality, floor/ceiling effects, reliability (internal consistency, test-retest reliability), and construct validity. Construct validity was evaluated by examining correlations with other variables including other fatigue measures such as Fatigue Severity Scale (FSS) and the vitality scale (SF-VT) of SF-36. Moreover, assumptions were explored about "known" groups concerning fatigue.<bold>Results: </bold>The mean score for the PFS-16 was 2.95 (± 0.91); acceptability was good with negligible floor and ceiling effects. Results showed high internal consistency (Cronbach's alpha, 0.96) and test-retest reliability (ICC, 0.93). Strong correlations were observed between the PFS-16 and other fatigue (FFS and SF-VT) measures (rs = 0.77 and - 0.70, p < 0.001), revealing appropriate validity. Furthermore, predictions for "known" groups validity were verified.<bold>Conclusion: </bold>The Greek version of the PFS-16 showed satisfactory reliability and validity and thus can be regarded as a useful tool in assessing fatigue in PD. [ABSTRACT FROM AUTHOR]
ISSN:15901874
DOI:10.1007/s10072-018-3695-5