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Table 2 Characteristics in 53 participants according to historic fulfilment of the American College of Rheumatology 1987 criteria

From: Low-field magnetic resonance imaging or combined ultrasonography and anti-cyclic citrullinated peptide antibody improve correct classification of individuals as established rheumatoid arthritis: results of a population-based, cross-sectional study

 

Rheumatoid arthritis (n = 20)

Not rheumatoid arthritis (n = 33)

P-value

Female, n (%)

14 (70)

16 (49)

.178

Age, years

72 (30-79)

59 (31-82)

.008

Symptom duration, years§

15 (2-32)

11 (1-53)

.369

Swollen joint count (40 joints)

4.5 (0-10)

0 (0-6)

.000

Tender joint count (40 joints)

10 (0-40)

3 (0-28)

.006

Current treatment with DMARDs, n (%)

16 (80)

0 (0)

.000

CRP, mg/l

5.5 (0-33)

3 (1-14)

.050

ESR, mm/hour

17 (2-53)

5 (1-28)

.000

Positive RF (>8 IE/ml), n (%)

13 (65)

1 (3)

.000

Positive ACPA (≥10 AU/l), n (%)

12 (60)

0 (0)

.000

Positive ACPA and RF, n (%)

11 (55)

0 (0)

.000

SF-36, physical component score*

38 (21-60)

40 (16-57)

.441

HAQ-DI*

0.5 (0-2.375)

0.25 (0-2.125)

.049

DAS28

3.7 (1.8-5.0)

NR

NR

Radiography, erosive (32 joints, ≥1 joint with erosion), n (%)

12 (60)

2 (6)

.000

Radiography, Larsen score

21.5 (0-80)

0 (0-13)

.000

RAMRIS, erosion score (wrist)#

4 (0-125)

1 (0-6)

.001

RAMRIS, erosion score (MCP-joints 2-5)†

1 (0-8)

0 (0-4)

.009

RAMRIS, bone marrow oedema score (wrist)#

2 (0-18)

0 (0-9)

.002

RAMRIS, bone marrow oedema score (MCP joints 2-5)†

0 (0-5)

0 (0-2)

.025

RAMRIS, synovitis score (wrist)#

4 (1-9)

3 (1-6)

.119

RAMRIS, synovitis score (MCP joints 2-5)†

6 (1-8)

3 (0-6)

.017

GS synovitis joint count (30 joints, score ≥2)

4.5 (0-19)

0 (0-6)

.000

GS synovitis joint count (wrists)

1 (0-2)

0 (0-1)

.001

PD joint count (30 joints; score ≥2)

1 (0-14)

0 (0-2)

.000

PD joint count (wrists)

0 (0-2)

0 (0-1)

.001

US erosive joint count (30 joints, score ≥2)

10.5 (0-23)

1 (0-10)

.000

US erosive joint count (wrists)

0.5 (0-2)

0 (0-1)

.000

US erosive (32 joints; ≥1 joint with erosion), n (%)

19 (95)

31 (94)

.871

  1. Values are median (range), unless otherwise stated. Mann-Whitney U test for continuous variables; χ2 test for proportions. §Rheumatoid arthritis, n = 19; not rheumatoid arthritis, n = 32. *Not rheumatoid arthritis, n = 32. #Rheumatoid arthritis, n = 18, not rheumatoid arthritis n = 32. †Rheumatoid arthritis, n = 13; not rheumatoid arthritis, n = 18. ACPA, anti-cyclic citrullinated peptide antibody; CRP, C-reactive protein; DAS28, disease activity score in 28 joints using CRP; DMARDs, disease-modifying antirheumatic drugs; ESR, erythrocyte sedimentation rate; GS, grey-scale; HAQ-DI, Health Assessment Questionnaire-Disability Index; MCP, metacarpophalangeal; NR, not relevant; PD, Power Doppler; RAMRIS, Rheumatoid Arthritis Magnetic Resonance Imaging scoring System; RF, IgM rheumatoid factor; SF-36, Medical Outcomes Study Short Form (36 items); US, ultrasonography.
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BMC Musculoskeletal Disorders

ISSN: 1471-2474

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