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Flat feet are associated with knee pain and cartilage damage in older adults.

Gross, K Douglas; Felson, David T; Niu, Jingbo; Hunter, David J; Guermazi, Ali; Roemer, Frank W; Dufour, Alyssa B; Gensure, Rebekah H; Hannan, Marian T

Arthritis care & research. 2011;63(7):937-944.

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Abstract

OBJECTIVE.: To assess the cross-sectional relation of planus foot morphology to ipsilateral knee pain and compartment-specific knee cartilage damage in older adults. METHODS.: In the Framingham Studies, we adapted the Staheli Arch Index (SAI) to quantify standing foot morphology from pedobarographic recordings. We inquired about knee pain and read 1.5 Tesla MRIs using whole-organ magnetic resonance imaging scoring. Logistic regression compared the odds of knee pain among the most planus feet to the odds among all other feet, and estimated odds within categories of increasing SAI. Similar methods estimated the odds of cartilage damage in each knee compartment. Generalized estimating equations adjusted for age, sex, BMI, and non-independent observations. RESULTS.: Among 1903 participants (mean age 65± 9 years; 56% female), 22% of knees were painful most days. Cartilage damage was identified in 45% of medial TF, 27% of lateral TF, 58% of medial PF, and 42% of lateral PF compartments. Compared with other feet, the most planus feet had 1.3 (95% CI: 1.1, 1.6) times the odds of knee pain (p=0.009), and 1.4 (95% CI: 1.1, 1.8) times the odds of medial TF cartilage damage (p=0.002). Odds of pain (p(trend)=0.05) and medial TF cartilage damage (p(trend)=0.001) increased linearly across categories of increasing SAI. There was no association between foot morphology and cartilage damage in other knee compartments. CONCLUSION.: Planus foot morphology is associated with frequent knee pain and medial TF cartilage damage in older adults.

Bibliographic metadata

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Volume:
63
Issue:
7
Start page:
937
End page:
944
Digital Object Identifier:
10.1002/acr.20431
Pubmed Identifier:
21225677
Access state:
Active

Institutional metadata

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Record metadata

Manchester eScholar ID:
uk-ac-man-scw:118635
Created by:
Ingram, Mary
Created:
11th February, 2011, 15:56:45
Last modified by:
Ingram, Mary
Last modified:
23rd August, 2012, 21:48:45

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