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Table 1 Demographic, clinical and ultrasonographic data of the study population at baseline

From: Serum levels of CXCL13 are associated with ultrasonographic synovitis and predict power Doppler persistence in early rheumatoid arthritis treated with non-biological disease-modifying anti-rheumatic drugs

  N= 161
Age, years, median (IQR) 64 (50 to 73)
F/M (%) 112/49 (69.6)
Disease duration, months, median (IQR) 3 (2 to 6)
DAS44, mean (± SD) 3.61 (0.96)
SDAI, mean (± SD) 31.53 (13.82)
SJC, median (IQR) 12 (8 to 18)
TJC, median (IQR) 12 (6 to 18)
RAI, median (IQR) 8 (5 to 11)
GH, 0 to 100 mm, median (IQR) 56 (50 to 73)
EGA, 0 to 10 cm, median (IQR) 4.6 (3.5 to 6)
PGA, 0 to 10 cm, median (IQR) 6 (4.8 to 8)
HAQ, median (IQR) 1.25 (0.75 to 1.88)
ESR, mm/h, median (IQR) 28.5 (17 to 46.5)
CRP, mg/dl, median (IQR) 1.19 (0.41 to 3.12)
IgM RF-positive, n. (%) 92 (57.1)
IgM RF titre, UI/ml, median (IQR) 69 (30.5 to 174)
IgG ACPA-positive, n. (%) 79 (49.1)
IgG ACPA titre, UI/ml, median (IQR) 100 (42.7 to 292.5)
US-GS score, median (IQR) 10 (5 to 12)
US-PD positive, n. (%) 122 (75.8)
US-PD score, median (IQR) 3.5 (1 to 8)
  1. ACPA, anti-citrullinated protein antibodies; CRP, C-reactive protein; DAS44, Disease Activity Score in 44 joints; EGA, evaluator global assessment of disease activity; ESR, erythrocyte sedimentation rate; GH, global health assessment; GS, Grey-Scale; HAQ, Health Assessment Questionnaire; Ig, immunoglobulin; IQR, interquartile range; PD, Power Doppler; PGA, patient global assessment of disease activity; RAI, Ritchie Articular Index; RF, rheumatoid factor; SD, standard deviation; SDAI, Simplified Disease Activity Score; SJC, swollen joint count; TJC, tender joint count; US, ultrasonography