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Erschienen in: The journal of nutrition, health & aging 10/2018

13.06.2018

Shifting from Declines to Improvements: Associations between a Meaningful Walking Speed Change and Cognitive Evolution over Three Years in Older Adults

verfasst von: Kristell Pothier, P. de Souto Barreto, M. Maltais, Y. Rolland, B. Vellas, DSA MAPT Study Group

Erschienen in: The journal of nutrition, health & aging | Ausgabe 10/2018

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Abstract

Background

Although the close relationship between mobility and cognitive declines is well-known, literature has very little questioned whether improvement in walking speed over time could be associated with improvements in cognitive functions. The objective of this study was to examine the associations between a clinically meaningful improvement in walking speed and global and specific cognitive changes in older adults. Design: Prospective cohort study.

Setting

Multidomain Alzheimer Preventive Trial (MAPT) study.

Participants

Three-hundred participants from the control group of the MAPT study (mean age 74.8 ± 4.2; 57% women).

Measurements

The 4-m usual walking speed, global cognition, memory, executive functions, and processing speed measures were collected at baseline, and at 6, 12, 24 and 36 months. Participants were categorized into three groups according to their walking speed change over the three-year study: 1/ Non-Improvers (participants not presenting an increase ≥0.05m/sec on walking speed; n=138); 2/ Improvers (increase ≥0.05m/sec; n=40); Cyclic (≥0.05m/sec improvement at some time points without maintaining it through the whole period; n=122).

Results

Adjusted mixed-effect linear regressions revealed that walking speed improvers did not significantly differ from participants who never or temporarily improved their walking speed on all of global and specific cognitive functions over three years. Nevertheless, a sensitivity analysis (excluding participants with a nonclinical walking speed improvement) indicated specific cognitive trajectories per group associated with better episodic memory scores for Improvers compared to non-improvers (β=2.41, 95% CI=.12 - 4.71; p=.039).

Conclusion

This study found that the overtime trajectories of cognitive functions did not differ as a function of clinically meaningful walking speed changes in older adults. Nevertheless, secondary analyses provided new insights on the relationship between walking speed and specific cognitive functions. The novelty of this approach (switching from declines to improvements) should be considered in future large-scale, observational longitudinal studies.
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Metadaten
Titel
Shifting from Declines to Improvements: Associations between a Meaningful Walking Speed Change and Cognitive Evolution over Three Years in Older Adults
verfasst von
Kristell Pothier
P. de Souto Barreto
M. Maltais
Y. Rolland
B. Vellas
DSA MAPT Study Group
Publikationsdatum
13.06.2018
Verlag
Springer Paris
Erschienen in
The journal of nutrition, health & aging / Ausgabe 10/2018
Print ISSN: 1279-7707
Elektronische ISSN: 1760-4788
DOI
https://doi.org/10.1007/s12603-018-1059-8

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