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Table 1 Demographic and clinical characteristics of RA patients (VERA, ERA and LSRA) at the study entry

From: Memory B cell subsets and plasmablasts are lower in early than in long-standing Rheumatoid Arthritis

Variables VERA ERA LSRA
N. 25 43 54
Age, years 57.5 ± 13.0 50.4 ± 14.9 53.0 ± 13.7
Sex, n. female, (%) 21 (84.0) 38 (88.4) 45 (86.5)
ESR, mm/1^hour 51.4 ± 33.7 39.1 ± 28.6 39.6 ± 23.8
CRP, mg/l 29.9 ± 45.5 16.2 ± 25.3 20.3 ± 28.0
DAS 3.7 ± 1.1 3.3 ± 1.0 3.7 ± 1.4
ACPA positivity, n. (%) 12 (48.0) 28 (65.1) 37 (72.5)
RF-IgM positivity, n. (%) 12 (48.0) 25 (58.1) 28 (54.9)
RF-IgA positivity, n. (%) 7 (28.0) 17 (39.5) 16 (31.4)
  1. Values are mean ± standard deviation unless otherwise indicated. ERA: early rheumatoid arthritis; LSRA: long-standing rheumatoid arthritis; VERA: very early rheumatoid arthritis; ESR: erythrocyte sedimentation rate; CRP: C-reactive protein; DAS: disease activity score; ACPA: anti-citrullinated peptide antibodies; RF: rheumatoid factor.