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Table 2 Prevalence of MRI findings and missed-diagnosis rate in different joint areas based on putative MRI of dominant or non-dominant hands compared to MRI of bilateral hands in 75 active early RA patients

From: The value of MRI examination on bilateral hands including proximal interphalangeal joints for disease assessment in patients with early rheumatoid arthritis: a cross-sectional cohort study

 MRI of bilateral handsPutative MRI of dominant handsPutative MRI of non-dominant hands
MRI findingsMRI findingsMissed-diagnosis rateMRI findingsMissed-diagnosis rate
PIPJs
 Tenosynovitis52 (69%)50 (67%)2 (3%)45 (60%)7 (9%)
 Synovitis65 (87%)59 (79%)6 (8%)58 (77%)7 (9%)
 Osteitis23 (31%)18 (24%)5 (7%)15 (20%)8 (11%)
 Bone erosion22 (29%)17 (23%)5 (7%)17 (23%)5 (7%)
MCPJs
 Tenosynovitis55 (73%)52 (69%)3 (4%)46 (61%)9 (12%)
 Synovitis64 (85%)64 (85%)061 (81%)3 (4%)
 Osteitis46 (61%)34 (45%)12 (16%)39 (52%)7 (9%)
 Bone erosion50 (67%)42 (56%)8 (11%)33 (44%)17 (23%)
Wrists
 Tenosynovitis56 (75%)54 (72%)2 (3%)51 (68%)5 (7%)
 Synovitis72 (96%)72 (96%)064 (85%)8 (11%)
 Osteitis59 (79%)52 (69%)7 (9%)52 (69%)7 (9%)
 Bone erosion74 (99%)72 (96%)2 (3%)74 (99%)0
  1. MCPJs metacarpophalangeal joints, PIPJs proximal interphalangeal joints
  2. Putative MRI of dominant or non-dominant hands means analyses on dominant or non-dominant hands based on MRI of bilateral hands, rather than performing separate MRI of dominant or non-dominant hands which increases physical and financial burdens of patients
  3. n = the number of patients with MRI findings in a certain joint region (e.g., PIPJs, MCPJs or wrists)
  4. n = the number of patients whose diagnosis would be missed if dominant or non-dominant hands were evaluated unilaterally