Abstract
Objectives
This study aimed to examine the association between sleep quality and physical performance
among a group of UK community-dwelling older adults, according to sex.
Methods
Sleep quality was assessed using the Pittsburgh Sleep Quality Index. Physical performance
was assessed using a short physical performance battery (SPPB), a timed up-and-go,
and a hand-grip strength test.
Results
Of 591 eligible study members, 401 completed the Pittsburgh Sleep Quality Index. In
regression analyses, men who reported poor sleep quality were significantly more likely
to have a poor SPPB score, even after adjustment for confounding factors (OR = 2.54,
95% CI 1.10-5.89, P= .03). The direction of the relationship was reversed among women, where those who
reported poor sleep were less likely to have a low SPPB score (OR = 0.36, 95% CI 0.15-0.85,
P = .02). Poor sleep quality was associated with poorer hand-grip strength among women
(regression coefficient = −0.34 z score, 95% CI −0.64, −0.04, P = .03), but this relationship was not observed among men (regression coefficient = 0.28
z score, 95% CI −0.01, 0.57, P = .06).
Conclusion
We found evidence of an association between poor sleep quality and poorer physical
performance in older adults, though there appear to be important sex differences.
Keywords
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Article info
Publication history
Published online: November 20, 2020
Identification
Copyright
© 2020 National Sleep Foundation. Published by Elsevier Inc. All rights reserved.
