Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/64717
Title: Perceived balance confidence level contributes to walking capacity in people with Parkinson's disease
Authors: Mak, MKY 
Pang, MYC 
Issue Date: 2008
Publisher: John Wiley & Sons
Source: Movement disorder, 2008, v. 23, suppl. 1, P624, p. s206 (Poster) (Abstracts) How to cite?
Journal: Movement disorders 
Abstract: Objective: To examine the contribution of physical impairments and balance confidence to the walking capacity in individuals with Parkinson’s disease (PD).
Background: Previous study reported that hypokinesia in walking and knee muscle weakness were contributing factors to reduced walking capacity in patients with PD. In addition to physical limitations, fear of falling was commonly found among individuals with PD. However, no study has addressed the contribution of balance confidence to walking capacity in this patient group.
Methods: Seventy-seven individuals with PD (mean age563.767.9 years old, Hoehn and Yahr Staging 2-3) and 57 healthy subjects (mean age566,167.6 years old) completed the study. Walking capacity was quantified by 6-minute walk test. Rigidity and leg agility were determined by Unified Parkinson’s disease rating scale. Maximum muscle strength of lower extremities was measured by a hand-held dynamometer. One-leg-stance time was used to indicate balance ability. Perceived balance confidence level was assessed by Activitiesspecific balance confidence (ABC) scale, which ranges from 0 indicating no confidence at all to 100 denoting full confidence.
Results: Patients with PD achieved a significantly shorter 6-minute walk distance (6MWD) of 332.6687.4m than control subjects (P<0.001). For PD-related impairments, patients had significantly weaker lower limb muscle strength and significantly shorter one-legstance time than control subjects (P<0.05). The mode for leg rigidity score was 4 ad leg agility score was 2, indicating moderate rigidity and mild bradykinesia respectively. The mean ABC score for patients with PD was 67.6616.9, which was significantly lower than control subjects, reflecting that these patients had reduced balance confidence (P<0.001). In multiple regression analysis, after accounting for basic demographics and disease duration, ABC score was the most significant determinant of 6MWD, accounting for 23.8% of the variance (P<0.001), followed by leg rigidity (8.6%, P<0.01), and leg agility (2.9%, P<0.05).
Conclusions: A lower balance confidence level was independently associated with reduced walking capacity in patients with PD. Physiotherapists have to consider both physical impairments and psycpsychological factors when designing therapeutic intervention for improving walking capacity in people with PD.
Description: Twelfth International Congress of Parkinson's disease and Movement Disorders, Chicago, USA, 22-26 June 2008
URI: http://hdl.handle.net/10397/64717
ISSN: 0743-4618 (print)
1477-3848 (online)
DOI: 10.1002/mds.22133
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