Open AccessAssessing Timed Up and Go in Parkinson’s disease: Reliability and validity of Timed Up and Go Assessment of biomechanical strategies
Author(s) -
Bruna Adriana da Silva,
Christina Danielli Coelho de Morais Faria,
Mariana Palla Santos,
Alessandra Swarowsky
Publication year - 2017
Publication title -
journal of rehabilitation medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.893
H-Index - 96
eISSN - 1651-2081
pISSN - 1650-1977
DOI - 10.2340/16501977-2254
Subject(s) - ceiling effect , physical medicine and rehabilitation , construct validity , physical therapy , timed up and go test , discriminant function analysis , medicine , posturography , reliability (semiconductor) , rating scale , balance (ability) , discriminant validity , internal consistency , psychology , psychometrics , statistics , developmental psychology , clinical psychology , pathology , mathematics , power (physics) , physics , alternative medicine , quantum mechanics
Objective: To investigate the measurement properties of the Timed Up and Go Assessment of Biomechanical Strategies (TUG-ABS) to determine its adequacy for use with individuals with Parkinson’s disease.Subjects: Fifty individuals with Parkinson’s disease.Design: Diagnostic accuracy.Methods: The study investigated the following properties: reliability (inter-examiner, intra-examiner, test-retest, internal consistency and minimal detectable change), construct validity, and floor and ceiling effect.Results: Considering the total score, the inter-examiner, test–retest and intra-examiner reliabilities were classified as excellent (0.95 ≤ intra-class correlation coefficient (ICC)≤0.99). The TUG-ABS presented excellent internal consistency (α = 0.98). The minimal detectable change was 3.82 points. The construct validity between the TUG-ABS and the Unified Parkinson’s Disease Rating Scale (UPDRS) – part III was classified as moderate (ρ = –0.62). Significant, elevated and positive correlations were obtained between TUG-ABS and the Balance Evaluation System Test (BESTest)-VI (ρ = 0.72) and negative correlations between TUG-ABS and TUG (ρ = –0.78). The discriminant function obtained with the total score of TUG-ABS classified 60% of the individuals correctly with respect to the group (determined by the performance in TUG) to which they belonged. One-way analysis of variance (ANOVA) showed that TUG-ABS discriminated the individuals with Parkinson’s disease in all stages according to Hoehn & Yahr. There was a ceiling effect of 22%.Conclusion: TUG-ABS presented adequate measurement properties in individuals with Parkinson’s disease