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Association between quantitatively measured infrapatellar fat pad high signal intensity alteration and MRI-assessed progression of knee osteoarthritis


Han, W and Aitken, D and Zheng, S and Wluka, AE and Zhu, Z and Blizzard, L and Winzenberg, T and Cicuttini, F and Jones, G and Ding, C, Association between quantitatively measured infrapatellar fat pad high signal intensity alteration and MRI-assessed progression of knee osteoarthritis, Arthritis Care & Research pp. 1-26. ISSN 2151-464X (2018) [Refereed Article]

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DOI: doi:10.1002/acr.23713


Objective: To describe the cross-sectional and longitudinal associations between quantitative measures of infrapatellar fat pad (IPFP) signal intensity alteration and knee structural abnormalities in patients with symptomatic knee OA.

Methods: 261 participants (mean age 63.0 7.2 years) with symptomatic knee OA were selected from a randomized controlled trial with a follow up of 2 years. IPFP signal intensity alterations at baseline were quantitatively measured on T2-weighted fat-saturated MRI using MATLAB. These quantitative measures included the standard deviation [sDev (IPFP)] of whole IPFP signal intensity, the upper quartile value [UQ (H)] of high signal intensity, the ratio of volume of high signal intensity alteration to volume of whole IPFP [Percentage (H)] and Clustering factor (H) representing the clustering effect of high signal intensity. Cartilage volume and defects, and BMLs were assessed using validated measures.

Results: Higher baseline sDev (IPFP), UQ (H) and Clustering factor (H) were associated with greater loss of tibial cartilage volume and larger increases in tibiofemoral cartilage defects over 2 years. Patients with high and medium tertiles of Clustering factor (H) had greater loss of cartilage volume per annum compared with those with low tertile (4.9% and 4.6% vs 3.3% p.a.). Baseline Percentage (H) and Clustering factor (H) were positively and significantly associated with increases in tibiofemoral BMLs over 2 years. Cross-sectional associations between IPFP measures and knee structures were similar but more consistent.

Conclusion: Quantitative measures of increased signal intensity in the IPFP were associated with knee structural abnormalities in tibiofemoral compartment, suggesting that these measurements could be used as an additional entry criteria in order to enrich for 'faster progressors' in studies of knee OA.

Item Details

Item Type:Refereed Article
Keywords:knee pain, infrapatellar fat pad, knee osteoarthritis
Research Division:Biomedical and Clinical Sciences
Research Group:Clinical sciences
Research Field:Rheumatology and arthritis
Objective Division:Health
Objective Group:Clinical health
Objective Field:Clinical health not elsewhere classified
UTAS Author:Han, W (Dr Weiyu Han)
UTAS Author:Aitken, D (Associate Professor Dawn Aitken)
UTAS Author:Zheng, S (Miss Shuang Zheng)
UTAS Author:Zhu, Z (Mr Zhaohua Zhu)
UTAS Author:Blizzard, L (Professor Leigh Blizzard)
UTAS Author:Winzenberg, T (Professor Tania Winzenberg)
UTAS Author:Jones, G (Professor Graeme Jones)
UTAS Author:Ding, C (Professor Chang-Hai Ding)
ID Code:128516
Year Published:2018
Web of Science® Times Cited:51
Deposited By:Menzies Institute for Medical Research
Deposited On:2018-09-27
Last Modified:2019-03-18
Downloads:98 View Download Statistics

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