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Assessment of synovitis with contrast-enhanced MRI using a whole-joint semiquantitative scoring system in people with, or at high risk of, knee osteoarthritis: the MOST study.

Guermazi, Ali; Roemer, Frank W; Hayashi, Daichi; Crema, Michel D; Niu, Jingbo; Zhang, Yuqing; Marra, Monica D; Katur, Avinash; Lynch, John A; El-Khoury, George Y; Baker, Kristin; Hughes, Laura B; Nevitt, Michael C; Felson, David T

Annals of the rheumatic diseases. 2011;70(5):805-811.

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Abstract

OBJECTIVES: /st> To introduce a comprehensive and reliable scoring system for the assessment of whole-knee joint synovitis based on contrast-enhanced (CE) MRI. METHODS: /st> Multicenter Osteoarthritis Study (MOST) is a cohort study of people with, or at high risk of, knee osteoarthritis (OA). SUBJECTS: are an unselected subset of MOST who volunteered for CE-MRI. Synovitis was assessed at 11 sites of the joint. Synovial thickness was scored semiquantitatively: grade 0 (<2 mm), grade 1 (2-4 mm) and grade 2 (>4 mm) at each site. Two musculoskeletal radiologists performed the readings and inter- and intrareader reliability was evaluated. Whole-knee synovitis was assessed by summing the scores from all sites. The association of Western Ontario and McMaster Osteoarthritis Index pain score with this summed score and with the maximum synovitis grade for each site was assessed. RESULTS: /st> 400 subjects were included (mean age 58.8±7.0 years, body mass index 29.5±4.9 kg/m(2), 46% women). For individual sites, intrareader reliability (weighted κ) was 0.67-1.00 for reader 1 and 0.60-1.00 for reader 2. Inter-reader agreement (κ) was 0.67-0.92. For the summed synovitis scores, intrareader reliability (intraclass correlation coefficient ( ICC)) was 0.98 and 0.96 for each reader and inter-reader agreement (ICC) was 0.94. Moderate to severe synovitis in the parapatellar subregion was associated with the higher maximum pain score (adjusted OR (95% CI), 2.8 (1.4 to 5.4) and 3.1 (1.2 to 7.9), respectively). CONCLUSIONS: /st> A comprehensive semiquantitative scoring system for the assessment of whole-knee synovitis is proposed. It is reliable and identifies knees with pain, and thus is a potentially powerful tool for synovitis assessment in epidemiological OA studies.

Bibliographic metadata

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Published date:
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Volume:
70
Issue:
5
Start page:
805
End page:
811
Digital Object Identifier:
10.1136/ard.2010.139618
Pubmed Identifier:
21187293
Pii Identifier:
ard.2010.139618
Access state:
Active

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Record metadata

Manchester eScholar ID:
uk-ac-man-scw:103590
Created by:
Ingram, Mary
Created:
6th January, 2011, 13:51:11
Last modified by:
Ingram, Mary
Last modified:
12th April, 2011, 13:55:07

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