Postural stability and gait among older adults with age-related maculopathy

Wood, Joanne M., Lacherez, Philippe F., Black, Alex, Cole, Michael H., Boon, Mei Ying and Kerr, Graham K. (2009) Postural stability and gait among older adults with age-related maculopathy. Investigative Ophthalmology and Vision Science, 50 1: 482-487. doi:10.1167/iovs.08-1942

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Author Wood, Joanne M.
Lacherez, Philippe F.
Black, Alex
Cole, Michael H.
Boon, Mei Ying
Kerr, Graham K.
Title Postural stability and gait among older adults with age-related maculopathy
Journal name Investigative Ophthalmology and Vision Science   Check publisher's open access policy
ISSN 0146-0404
1552-5783
Publication date 2009-01-01
Sub-type Article (original research)
DOI 10.1167/iovs.08-1942
Open Access Status File (Publisher version)
Volume 50
Issue 1
Start page 482
End page 487
Total pages 6
Place of publication Rockville, MD, United States
Publisher Association for Research in Vision and Ophthalmology
Language eng
Subject 1701 Psychology
Formatted abstract
Purpose
To assess the postural stability and gait characteristics of adults with age-related maculopathy (ARM) and to identify the visual factors associated with postural stability and gait in this clinical population.

Methods
Participants included 80 individuals with a range of severity of ARM (mean age, 77.2 years). Binocular visual function measures included visual acuity, contrast sensitivity, and merged binocular visual fields. Postural stability was assessed on both a firm and a foam surface using center-of-pressure measures derived from a force platform. Forty three of the participants underwent a three-dimensional motion analysis to quantify gait characteristics, including walking velocity, proportion of time spent with both feet in contact with the ground (double-support time), stride length, and step width.

Results
After adjustment for age, sex, self-reported physical function, and cataract severity, all the vision measures were significantly associated with postural stability on the foam surface, with contrast sensitivity being the strongest correlate. In the analysis of the gait measures, only contrast sensitivity was significantly associated with walking velocity, step width, or stride length, whereas contrast sensitivity and visual field loss were both significantly associated with double-support time.

Conclusions
Impaired contrast sensitivity was associated with postural instability, slower walking velocity, increased step width, and reduced stride length. Impairments in either contrast sensitivity or visual fields were associated with increased double-support time. This result suggests that loss of contrast sensitivity and visual fields in patients with ARM can lead to balance and mobility problems.
Keyword Postural stability
Gait
Age-related maculopathy
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Originally published In Press on September 12, 2008

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Psychology Publications
 
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Created: Thu, 04 Feb 2010, 00:32:30 EST by Gerald Martin on behalf of Faculty Of Health Sciences