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Longitudinal study of the relationship between physical activity and knee pain and functional limitation in community-dwelling older adults

journal contribution
posted on 2023-05-20, 14:58 authored by Saliu BalogunSaliu Balogun, Scott, D, Cicuttini, F, Graeme JonesGraeme Jones, Dawn AitkenDawn Aitken
Aims: To describe the associations between interindividual (between-person) and intraindividual (within-person) variability in physical activity (PA) and knee pain and functional limitation among older adults. We also investigated the potential bidirectional association of between-person and within-person variability in knee pain and functional limitation with PA.

Method: Participants (N = 1064; 51% women; mean age 63 ± 7.4 years) were measured at baseline, 2.5, and 5 years. PA was measured using pedometers. Knee pain and functional limitation were assessed using the WOMAC scale. A two-part hurdle model, with adjustment for confounders, estimated the association of between-person and within-person variability in PA with knee pain/functional limitation (as the outcome). Linear mixed effect regression models described the association of between-person and within-person variability in knee pain and functional limitation with PA (as the outcome).

Results: Between-person effects showed that participants with a higher 5-year average PA had lower average WOMAC scores (β= -1.17, 95% CI: -1.82, -0.51). Within-person effects showed that at time-points when participants had a higher PA level than average, they also had lower WOMAC scores (β= -0.85, 95% CI: -1.36, -0.35). Conversely, both between-person (β= -15.6, 95% CI: -22.5, -8.8) and within-person increase (β= -7.4, 95% CI: -13.5, -1.4) in WOMAC scores were associated with lower PA.

Conclusion: These findings suggest that PA and knee pain/dysfunctional contribute to the development of one another. Pain can lead to changes in inter- and intraindividual PA levels, but the reverse is also possible - changes in PA results in changes in inter- and intraindividual pain/dysfunctional levels.

History

Publication title

Archives of Gerontology and Geriatrics

Volume

90

Article number

104101

Number

104101

Pagination

1-5

ISSN

0167-4943

Department/School

Menzies Institute for Medical Research

Publisher

Elsevier Sci Ireland Ltd

Place of publication

Customer Relations Manager, Bay 15, Shannon Industrial Estate Co, Clare, Ireland

Rights statement

© 2020 Elsevier B.V. All rights reserved.

Repository Status

  • Restricted

Socio-economic Objectives

Clinical health not elsewhere classified

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