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Table 3 Comparison of ultrasonography and MRI examination in the diagnosis of RA (joint number: n = 1364)

From: Comparison of the clinical effectiveness of US grading scoring system vs MRI in the diagnosis of early rheumatoid arthritis (RA)

Method Synovitis Joint effusion Tenosynovitis Bone erosion
US 1074 (78.74%) 403 (29.55%) 426 (31.23%) 572 (41.94%)
MRI 1053 (77.20%) 420 (30.79%) 446 (32.70%) 886 (64.96%)
χ 2 0.94 0.50 0.67 145.26
P 0.33 0.48 0.41 0.0001
  1. When the PDUS or GSUS score is ≥ 1, the diagnostic result is considered positive for early RA