Title: Reliability of the new freezing of gait questionnaire: Agreement between patients with Parkinson's disease and their carers
Authors: Nieuwboer, Alice ×
Rochester, Lynn
Herman, Talia
Vandenberghe, Wim
Emil, George Ehab
Thomaes, Tom
Giladi, Nir #
Issue Date: Nov-2009
Publisher: Butterworth-Heinemann
Series Title: Gait & Posture vol:30 issue:4 pages:459-463
Abstract: Freezing of gait (FOG) is difficult to measure due to its unpredictable occurrence. This study investigated: (1) whether the new freezing of gait questionnaire (NFOG-Q) is a reliable measure of freezing by comparing patients' ratings with those of carers' and (2) whether adding a video improved its reliability. Non-demented people with Parkinson's disease (PD) (N=102) and their carers of similar age and cognitive status were recruited from movement disorders clinics in three countries. The NFOG-Q was administered to carers and patients independently before and after watching a video showing several examples of FOG. Patients had very high agreement between their pre- and post-video detection of FOG (Kappa=0.91). However, this was less than in carers (Kappa=0.79). The video had a significant influence (p=0.01) on the rating of FOG severity (duration) but not on the estimation of its functional impact. Post-video freezing severity scores in the 69 freezers showed high agreement with carers' scores (ICC=0.78 [0.65;0.87]). We conclude that the NFOG-Q is a reliable tool to detect and evaluate the impact and severity of FOG. Adding a video does not add to the sensitivity and specificity of FOG detection but influences the estimation of FOG severity.
ISSN: 0966-6362
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Research Group for Neuromotor Rehabilitation
Research Group Experimental Neurology
Research Group for Cardiovascular and Respiratory Rehabilitation
Laboratory for Parkinson Research
× corresponding author
# (joint) last author

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