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Table 1 Baseline differences between patients who latter evolved into RA (RA-group), comparing to who did not (non-RA group).

From: Predictors of chronicity and the discriminative value of the new ACR/EULAR rheumatoid arthritis classification criteria in an untreated polyarthritis cohort with less than 6 weeks of disease duration

Parameter

RA

Non-RA

p-value

DAS28

6.2 (4.9-7.3)

4.8 (3.8-5.9)

0.016*

VAS

60 (50-89.5)

46 (30-60)

0.045*

Swollen joints

8 (3-20)

2 (0-9.7)

0.042*

Tender joints

10 (3-20)

5.5 (2-17.7)

0.202

Total involved joints

12 (8-18)

10.5 (3.5-18)

0.380

CRP

2.74 (1.7-4.3)

2.1 (0.1-4.8)

0.810

ESR

37 (26.5-63.5)

25 (19.5-60)

0.419

HAQ

1.9 (1-2)

0.87 (0.25-1)

0.020*

  1. *p-value <0.05; DAS28: Disease Activity Score 28; VAS: Visual Analogue Scale; ESR: Erythrocyte sedimentation rate; HAQ: Health Assessment Questionnaire; RA: Rheumatoid arthritis. Values are expressed as median and interquartile range: median (IQR).