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The Association between Poor Diet Quality, Physical Fatigability and Physical Function in the Oldest-Old from the Geisinger Rural Aging Study

1
Department of Kinesiology, Louisiana State University, Baton Rouge, LA 70803, USA
2
Department of Nutritional Sciences, Pennsylvania State University, University Park, PA 16802, USA
3
Geisinger Obesity Institute, Geisinger Health System, Danville, PA 17822, USA
4
Larner College of Medicine, University of Vermont, Burlington, VT 05401, USA
5
Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA 15261, USA
6
Pennington Biomedical Research Center, Baton Rouge, LA 70808, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Phyo Kyaw Myint
Received: 24 February 2021 / Revised: 7 April 2021 / Accepted: 12 April 2021 / Published: 15 April 2021
(This article belongs to the Section Geriatric Nutrition)
More perceived physical fatigability and poor diet quality are associated with impairments in physical function in older adults. However, the degree to which more perceived fatigability explains the association between poor diet quality and low physical function is unknown. We examined this relationship in 122 (66F, 56M) of the oldest-old participants from the Geisinger Rural Aging Study (GRAS). We used 24-h dietary recalls to assess the Healthy Eating Index (HEI), the Pittsburgh Fatigability Scale (PFS, 0–50) to assess perceived physical fatigability, and the PROMIS Physical Function 20a* to assess physical function. We grouped participants into three age categories: 80–84 (n = 51), 85–89 (n = 51), and 90+ (n = 20) years. Multiple linear regression revealed that a lower HEI was associated with higher PFS Physical score after adjusting for age group, sex, body mass index, and the number of medical conditions (p = 0.001). Several macro- and micro-nutrient intakes were also lower in those reporting more (≥15) compared to less (<15) perceived physical fatigability. Mediation analysis revealed that PFS Physical scores explained ~65% (p = 0.001) of the association between HEI total score and PROMIS19 Physical Function score. Poor diet quality may contribute to more perceived physical fatigability, which could exacerbate impairments in the oldest-old’s physical function. View Full-Text
Keywords: nutrition; fatigue; macronutrients; micronutrients; healthy eating index; protein; frailty; physical function; aging; geriatrics nutrition; fatigue; macronutrients; micronutrients; healthy eating index; protein; frailty; physical function; aging; geriatrics
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MDPI and ACS Style

Davis, B.; Liu, Y.-H.; Stampley, J.; Wood, G.C.; Mitchell, D.C.; Jensen, G.L.; Gao, X.; Glynn, N.W.; Still, C.D.; Irving, B.A. The Association between Poor Diet Quality, Physical Fatigability and Physical Function in the Oldest-Old from the Geisinger Rural Aging Study. Geriatrics 2021, 6, 41. https://0-doi-org.brum.beds.ac.uk/10.3390/geriatrics6020041

AMA Style

Davis B, Liu Y-H, Stampley J, Wood GC, Mitchell DC, Jensen GL, Gao X, Glynn NW, Still CD, Irving BA. The Association between Poor Diet Quality, Physical Fatigability and Physical Function in the Oldest-Old from the Geisinger Rural Aging Study. Geriatrics. 2021; 6(2):41. https://0-doi-org.brum.beds.ac.uk/10.3390/geriatrics6020041

Chicago/Turabian Style

Davis, Brett, Yi-Hsuan Liu, James Stampley, G. C. Wood, Diane C. Mitchell, Gordon L. Jensen, Xiang Gao, Nancy W. Glynn, Christopher D. Still, and Brian A. Irving 2021. "The Association between Poor Diet Quality, Physical Fatigability and Physical Function in the Oldest-Old from the Geisinger Rural Aging Study" Geriatrics 6, no. 2: 41. https://0-doi-org.brum.beds.ac.uk/10.3390/geriatrics6020041

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