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Association of baseline knee bone size, cartilage volume, and body mass index with knee cartilage loss over time: a longitudinal study in younger or middle-aged adults

journal contribution
posted on 2023-05-17, 09:57 authored by Benny Eathakkattu AntonyBenny Eathakkattu Antony, Chang-Hai DingChang-Hai Ding, Stannus, OP, Cicuttini, F, Graeme JonesGraeme Jones
OBJECTIVE: To determine the association of knee bone size, cartilage volume, and body mass index (BMI) at baseline with knee cartilage loss over 2 years in younger or middle-aged adults. METHODS: A total of 324 subjects (mean age 45 yrs, range 26-61) were measured at baseline and about 2 years later. Knee cartilage volume and bone size were determined using T1-weighted fat-saturated magnetic resonance imaging. RESULTS: In multivariable analysis, baseline knee bone size was negatively associated with annual change in knee cartilage volume at medial and lateral tibial sites (ß = -0.62% to -0.47%/cm(2), all p < 0.001). The associations disappeared at medial tibial site after adjustment for baseline cartilage volume and became of borderline statistical significance at lateral tibial site after adjustment for both baseline cartilage volume and osteophytes (ß = -0.29, p = 0.059). Baseline knee cartilage volume was consistently and negatively associated with annual change in knee cartilage volume at all 3 medial tibial, lateral tibial, and patellar sites (ß = -4.41% to -1.37%/ml, all p < 0.001). Baseline BMI was negatively associated with an annual change in knee cartilage volume, but only in subjects within the upper tertile of baseline cartilage volume, even after adjusting for cartilage defects (ß = -0.16% to -0.34%/kg/m(2), all p < 0.05). CONCLUSION: Our study suggests that both higher baseline tibial bone area and knee cartilage volume (most likely due to cartilage swelling) are associated with greater knee cartilage loss over 2 years. A higher BMI was associated with greater knee cartilage loss only in subjects with higher baseline cartilage volume.

History

Publication title

Journal of Rheumatology

Volume

38

Issue

9

Pagination

1973-1980

ISSN

0315-162X

Department/School

Menzies Institute for Medical Research

Publisher

J Rheumatol Publ Co

Place of publication

920 Yonge St, Suite 115, Toronto, Canada, Ontario, M4W 3C7

Rights statement

Copyright 2011 Journal of Rheumatology

Repository Status

  • Restricted

Socio-economic Objectives

Clinical health not elsewhere classified

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