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Table 4 Main characteristics and distribution of US and CT abnormalities in patients with different subtypes of SLE arthropathy

From: Ultrasonographic assessment of bone erosions in the different subtypes of systemic lupus erythematosus arthritis: comparison with computed tomography

  Rhupus (n = 9) JA (n = 10) NDNE (n = 7) Rhupus vs JA (p value) Rhupus vs NDNE (p value) JA vs NDNE (p value)
Age, years (mean ± SD) 41.0 ± 5.7 61.3 ± 14.3 43.1 ± 16.4 0.001 0.765 0.035
Disease duration, years (mean ± SD) 13.7 ± 6.6 21.7 ± 10.7 10.8 ± 4.1 0.035 0.298 0.003
Rheumatoid factor 7 (77.8 %) 2 (20.0 %) 2 (28.5 %) - - -
Anti-CCP 6 (66.7 %) 0 (0) 1 (14.2 %) - - -
US erosion number (median (25th to 75th percentile)) 3.0 (1.7–4.2) 0.5 (0–2.0) 0 (0–1.0) 0.019 0.004 0.569
US quadrants with erosion 27 (10.7 %) 12 (4.3 %) 4 (2.0 %) - - -
ScUSSe total (median (25th to 75th percentile)) 4.0 (2.5–6.0) 1.0 (0–3.0) 0 (0–1.0) 0.021 0.003 0.535
 Grade 1 (<2 mm) 16a 10a 4a - - -
 Grade 2 (2–3 mm) 9a 1a 0a - - -
 Grade 3 (>3 mm) 2a 1a 0a - - -
CT erosion number (mean ± SD) 14.0 ± 9.7 5.7 ± 5.1 4.7 ± 4.5 0.050 0.030 0.543
RAMRIS (mean ± SD) 21.6 ± 18.2 7.4 ± 7.0 5.1 ± 5.0 0.053 0.029 0.448
RAMRIS MCP (median (25th to 75th percentile)) 6.0 (4.5–10.2) 1.0 (0–2.0) 0 (0–1.5) 0.013 0.009 0.353
RAMRIS wrist (median (25th to 75th percentile)) 8.0 (10.2–16.2) 3.5 (0–11.0) 3.0 (0.5–6.7) 0.111 0.057 0.694
 Grade 1 (1–10 %) 24a 21a 6a - - -
 Grade 2 (11–20 %) 19a 6a 6a - - -
 Grade 3 − 10 (21–100 %) 7a 1a 2a - - -
  1. Numbers in bold indicate statistical significance for p <0.05. Boxes are empty where statistics was not applied
  2. aAbsolute numbers referring to joint quadrants. JA Jaccoud’s arthropathy, NDNE non-deforming non-erosive, Anti-CCP anti-cyclic citrullinated peptide, US ultrasound, ScUSSe scoring ultrasound structural erosion, CT computed tomography, RAMRIS rheumatoid arthritis magnetic resonance imaging score, MCP metacarpophalangeal joint