J Gerontol A Biol Sci Med Sci. 2021 Nov 15;76(12):2194-2203. doi: 10.1093/gerona/glab103.
Visual Impairment and Objectively Measured Physical Activity in Middle-Aged and Older Adults.
The journals of gerontology. Series A, Biological sciences and medical sciences
Yurun Cai, Jennifer A Schrack, Hang Wang, Jian-Yu E, Amal A Wanigatunga, Yuri Agrawal, Jacek K Urbanek, Eleanor M Simonsick, Luigi Ferrucci, Bonnielin K Swenor
Affiliations
Affiliations
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA.
- Center on Aging and Health, Johns Hopkins School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA.
- Wilmer Eye Institute, Johns Hopkins School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA.
- Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA.
- Division of Geriatric Medicine and Gerontology, Johns Hopkins School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA.
- Intramural Research Program, National Institute on Aging, Baltimore, Maryland, USA.
PMID: 33837407
PMCID: PMC8599058 DOI: 10.1093/gerona/glab103
Abstract
BACKGROUND: Vision loss is associated with increased risk of falls and restricted physical activity, yet the relationship between multiple vision measures and objectively measured physical activity, especially activity patterns, in mid-to-late life is not well understood.
METHOD: This study included 603 participants aged 50 years and older (mean age = 73.5) in the Baltimore Longitudinal Study of Aging who had the following assessments: presenting and best-corrected visual acuity, contrast sensitivity, visual fields, stereo acuity, and free-living physical activity using a wrist-worn ActiGraph accelerometer for 7 days. Linear regression models were used to examine the association between vision measures and daily activity counts, active minutes, and activity fragmentation (defined as an active-to-sedentary transition probability), adjusting for potential confounders. Mixed-effects models estimated differences in activity by time of day comparing those with and without each visual impairment.
RESULTS: In the fully adjusted model, worse presenting visual acuity, contrast sensitivity, and visual fields were associated with fewer activity counts, less active time, and more fragmented activity patterns (p < .05 for all). Participants with presenting or best-corrected visual acuity impairment had 19.2 and 29.3 fewer active minutes (p = .05 and p = .03, respectively) per day. Visual field impairment was associated with 268 636 fewer activity counts (p = .02), 46.2 fewer active minutes (p = .02) per day, and 3% greater activity fragmentation (p = .009). Differences in activity levels tended to be greatest from 6 am to 6 pm (p < .05).
CONCLUSIONS: Older adults with visual impairment have restricted and more fragmented patterns of daily activity. Longitudinal studies to quantify the long-term impacts of visual impairments on activity decline are warranted.
© The Author(s) 2021. Published by Oxford University Press on behalf of The Gerontological Society of America. All rights reserved. For permissions, please e-mail: [email protected].
Keywords: Accelerometry; Activity fragmentation; Epidemiology; Physical activity; Vision loss
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