Table 1

Selected clinical characteristics of 32 patients with RA and 28 healthy control subjects

DataRheumatoid arthritis (n = 32)Control subjects (n = 28)p Value
Mean (SD) and median (interquartile range).
CRP, C reactive protein; actual CRP, CRP at the moment of ultrasound examination; average CRP, CRP levels evaluated at different times during the disease (at least four determinations/year); CRP duration, average CRP multiplied by the duration of the disease in years.
Age (years)50 (7)48 (8)NS
Men (%)1316NS
Body mass index (kg/m2)23 (2)22 (2)NS
Erythrocyte sedimentation rate (mm/1st h)26 (15)11 (5)<0.001
Systolic blood pressure (mm Hg)131 (14)137 (12)NS
Diastolic blood pressure (mm Hg)72 (6)71 (5)NS
Actual CRP (mg/l)10.4 (5–18)2 (1–6)<0.001
Average CRP (mg/l)14 (9–23)2 (1–7)<0.001
CRP duration (mg/l×years)112 (50–299)
Rheumatoid factor positive (%)53
Bone erosions (%)49
Total cholesterol (mmol/l)5.7 (0.9)5.1 (1.1)<0.05
LDL cholesterol (mmol/l)3.5 (0.8)3.2 (1.0)NS
HDL cholesterol (mmol/l)1.6 (0.5)1.3 (0.4)<0.05
Triglycerides (mmol/l)1.0 (0.7)1.3 (0.6)NS
Homocysteine (μmol/l)5.9 (1.6)6.8 (2.8)NS