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German Translation and Validation of the “Freezing of Gait Questionnaire” in Patients with Parkinson’s Disease

2015; Hindawi Publishing Corporation; Volume: 2015; Linguagem: Inglês

10.1155/2015/982058

2090-8083

Anina Vogler, Jorina Janssens, Thomas Nyffeler, Stephan Bohlhalter, Tim Vanbellingen,

Cerebral Palsy and Movement Disorders

Background . Freezing of Gait (FOG) is a disabling parkinsonian symptom. The Freezing of Gait Questionnaire (FOG-Q) reliably detects FOG in patients with Parkinson’s disease (PD). Objectives . The aim of this study was to develop a German translated version of the FOG-Q and to assess its validity. Methods . The translation was accomplished using forward-backward-translation. The construct validity of the FOG-Q was examined in twenty-seven German native speaking PD patients. Convergent validity was assessed by correlating the FOG-Q with the Movement Disorder Society-Unified Parkinson’s Disease Rating Scale (MDS-UPDRS) II-III, the Parkinson Disease Questionnaire 39 (PDQ-39), and the Timed Up and Go Test (TUG). Divergent validity was assessed by correlating the FOG-Q with the MDS-UPDRS I. The internal consistency was measured using Cronbach’s alpha (C α ). Results . A good internal structure of the FOG-Q was found ( C α = 0.83 ). Significant moderate correlations between the FOG-Q and the MDS-UPDRS item 2.13 (freezing) ( r s = 0.568 , P = 0.002 ) and between the FOG-Q and the PDQ-39 subscale mobility ( r s = 0.516 , P = 0.006 ) were found. The lack of correlation with the MDS-UPDRS I demonstrated good divergent validity. Conclusion . The German FOG-Q is a valid tool to assess FOG in German native speaking PD patients.