Plantar pressures in people with midfoot osteoarthritis: cross-sectional findings from the Clinical Assessment Study of the Foot

LITHGOW, Merridy J., BULDT, Andrew K., MUNTEANU, Shannon E., MARSHALL, Michelle, THOMAS, Martin J., PEAT, George, RODDY, Edward and MENZ, Hylton B. (2024). Plantar pressures in people with midfoot osteoarthritis: cross-sectional findings from the Clinical Assessment Study of the Foot. Gait & Posture, 108, 243-249.

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Abstract

Background Midfoot osteoarthritis (OA) is a common condition, however its aetiology is not well understood. Understanding how plantar pressures differ between people with and without midfoot OA may provide insight into the aetiology and how best to manage this condition. Research question To compare plantar pressures between people with and without symptomatic radiographic midfoot OA. Methods This was a cross-sectional study of adults aged ≥50 years registered with four UK general practices who reported foot pain in the past year. Symptomatic radiographic midfoot OA was defined as midfoot pain in the last four weeks, combined with radiographic OA in one or more midfoot joints. Cases were matched 1:1 for sex and age (± 5 years) to asymptomatic controls. Peak plantar pressure and maximum force in 10 regions of the foot were determined using a pressure platform (RSscan International, Olen, Belgium) and compared between the groups using independent samples t-tests and effect sizes (Cohen’s d). Results We included 61 midfoot OA cases (mean age 67.0, SD 8.1, 31 males, 30 females) and matched these to 61 controls (mean age 66.0, SD 7.9). Midfoot OA cases displayed greater force (d=0.79, medium effect size, p=<0.001) and pressure at the midfoot (d=0.70, medium effect size, p=<0.001), greater force at the fourth metatarsophalangeal (MTP) joint (d=0.28, small effect size, p=0.13), and fifth MTP joint (d=0.37, small effect size, p=0.10) and greater pressure at the fifth MTP joint (d=0.34, small effect size, p=0.13). They also displayed lower force (d=0.40, small effect size, p=0.02) and pressure at the hallux (d=0.50, medium effect size, p=<0.001) and lower force (d=0.54, medium effect size, p=<0.001) and pressure at the lesser toes (d=0.48, small effect size, p=<0.001) compared with controls. Significance Midfoot OA appears associated with lowering of the medial longitudinal arch, greater lateral push off and less propulsion at toe off. Longitudinal studies are needed to establish causal relationships.

Item Type:	Article
Additional Information:	** Article version: AM ** From Elsevier via Jisc Publications Router ** Licence for AM version of this article starting on 12-12-2023: http://creativecommons.org/licenses/by/4.0/ **Journal IDs: issn 09666362 **History: issued 12-12-2023; accepted 08-12-2023
Identification Number:	https://doi.org/10.1016/j.gaitpost.2023.12.008
Page Range:	243-249
SWORD Depositor:	Colin Knott
Depositing User:	Colin Knott
Date Deposited:	15 Dec 2023 10:43
Last Modified:	02 Jan 2024 16:00
URI:	https://shura.shu.ac.uk/id/eprint/32885

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