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Table 2 Recent-onset rheumatoid arthritis patients in the Sherbrooke Early Undifferentiated PolyArthritis Cohort a

From: Serum C-X-C motif chemokine 13 is elevated in early and established rheumatoid arthritis and correlates with rheumatoid factor levels

Patient demographics (N= 339)

Seronegative

Seropositive

Number of patients (%)

166 (49%)

173 (51%)

Average age, yr (range)

54.2 (21 to 92)

65.6 (19 to 87)

Females, n (%)

107 (64)

105 (61)

Symptom duration, yr

0.44

0.45

SE status, n

120

132

  SE alleles = 0

75

43

  SE alleles = 1

44

59

  SE alleles = 2

1

30

Mean DAS28-CRP (±SD)

5.10 (1.47)

5.04 (1.44)

Mean CRP mg/L (±SD)

24.4 (33.9)

26.6 (35.6)

Mean Sharp score erosions (±SD)

2.9 (6.1)

3.8 (7.0)

Mean Sharp score narrowing (±SD)

3.4 (6.1)

2.2 (4.1)

Tender joints

10.4

9.8

Swollen joints

10.5

10.2

Patient VAS score (100-mm scale)

54.2

53.9

  1. aCRP, C-reactive protein; DAS28-CRP, Disease Activity Score in 28 joints C-reactive protein; SE, Shared epitope; VAS, Visual Analogue Scale. Seronegative vs seropositive analysis: Symptom duration, P = 0.85; DAS28-CRP, P = 0.72; CRP, P = 0.56; Sharp score erosions, P = 0.28; Sharp score narrowing, P = 0.09.