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- Title
Visual Impairment and Objectively Measured Physical Activity in Middle-Aged and Older Adults.
- Authors
Cai, Yurun; Schrack, Jennifer A; Wang, Hang; E, Jian-Yu; Wanigatunga, Amal A; Agrawal, Yuri; Urbanek, Jacek K; Simonsick, Eleanor M; Ferrucci, Luigi; Swenor, Bonnielin K
- Abstract
<bold>Background: </bold>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.<bold>Method: </bold>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.<bold>Results: </bold>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).<bold>Conclusions: </bold>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.
- Subjects
VISION disorders; MIDDLE-aged persons; PHYSICAL activity; OLDER people; CONTRAST sensitivity (Vision); EXERCISE; ACCIDENTAL falls; AGING; VISUAL acuity; RESEARCH funding; LONGITUDINAL method
- Publication
Journals of Gerontology Series A: Biological Sciences & Medical Sciences, 2021, Vol 76, Issue 12, p2194
- ISSN
1079-5006
- Publication type
journal article
- DOI
10.1093/gerona/glab103