Journal article
Scoring festination and gait freezing in people with Parkinson's: The freezing of gait severity tool-revised
Physiotherapy Research International, Vol.28(4), pp.1-10
2023
PMID: 37199289
Abstract
Background and purpose: To improve existing clinical assessments for freezing of gait (FOG) severity, a new clinician-rated tool which integrates the varied types of freezing (FOG Severity Tool-Revised) was developed. This cross-sectional study investigated its validity and reliability.
Methods: People with Parkinson's disease who were able to independently ambulate eight-metres and understand study instructions were consecutively recruited from outpatient clinics of a tertiary hospital. Those with co-morbidities severely affecting gait were excluded. Participants were assessed with the FOG Severity Tool-Revised, three functional performance tests, the FOG Questionnaire, and outcomes measuring anxiety, cognition, and disability. The FOG Severity Tool-Revised was repeated for test-retest reliability. Exploratory factor analysis and Cronbach's alpha were computed for structural validity and internal consistency. Reliability and measurement error were estimated with ICC (two-way, random), standard error of measurement, and smallest detectable change (SDC95 ). Criterion-related and construct validity were calculated with Spearman's correlations.
Results: Thirty-nine participants were enrolled [79.5% (n = 31) male; Median (IQR): age-73.0 (9.0) years; disease duration-4.0 (5.8) years], with fifteen (38.5%) who reported no medication state change contributing a second assessment for reliability estimation. The FOG Severity Tool-Revised demonstrated sufficient structural validity and internal consistency (α = 0.89-0.93), and adequate criterion-related validity compared to the FOG Questionnaire (ρ = 0.73, 95% CI 0.54-0.85). Test-retest reliability (ICC = 0.96, 95%CI 0.86-0.99) and random measurement error (%SDC95 = 10.4%) was acceptable in this limited sample.
Discussion and conclusions: The FOG Severity Tool-Revised appeared valid in this initial sample of people with Parkinson's. While its psychometric properties remain to be confirmed in a larger sample, it may be considered for use in the clinical setting.
Details
- Title
- Scoring festination and gait freezing in people with Parkinson's: The freezing of gait severity tool-revised
- Authors
- Aileen E Scully (Corresponding Author) - Curtin UniversityDawn Tan (Author) - Singapore General HospitalBeatriz Ito Ramos de Oliveira (Author) - Curtin UniversityKeith D Hill (Author) - Monash UniversityRoss Clark (Author) - University of the Sunshine Coast, Queensland, School of Health - Public HealthYong Hao Pua (Author) - Duke-NUS Medical School
- Publication details
- Physiotherapy Research International, Vol.28(4), pp.1-10
- Publisher
- John Wiley & Sons Ltd.
- Date published
- 2023
- DOI
- 10.1002/pri.2016
- ISSN
- 1471-2865
- PMID
- 37199289
- Copyright note
- This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial‐NoDerivsLicense, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.© 2023 The Authors. Physiotherapy Research International published by John Wiley & Sons Ltd.
- Grant note
- Mitsui Sumitomo Insurance Welfare Foundation Australian government Research Training Program (RTP) stipend scholarship
- Organisation Unit
- University of the Sunshine Coast, Queensland; School of Health - Public Health
- Language
- English
- Record Identifier
- 99725895002621
- Output Type
- Journal article
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