Table 1

Clinical data of the patients with early rheumatoid arthritis (early RA; disease duration of less than one year), late rheumatoid arthritis (late RA; disease duration of more than one year), spondyloarthropathy (SpA), and osteoarthritis (OA). Mean (standard deviation) (range)

Early RALate RASpAOA
Number of patients16142312
Sex (M/F)6/103/1113/105/7
Age (years)51 (17) (18–80)56 (12) (36–81)41 (15) (19–64)62 (15) (38–80)
Disease duration (years)0.6 (0.3) (0.2–1)8.5 (5.7) (1.5–20)0.7 (0.5) (0.1–1)Unknown
Joint effusion of the knee (+/−)10/68/613/103/9
Number of swollen joints6.9 (4.7)6.8 (6.6)1.6 (0.8)1.2 (0.9)
Serum CRP1-150 (mg/l)36 (26)42 (41)24 (23)05 (03)
Sedimentation rate (mm/1st h)35 (25)38 (18)24 (18)13 (9)
Shared epitope (+/−)12/411/36/173/9
HLA-B27 (+/−)0/161/1311/120/12
Rheumatoid factor (+/−)6/1010/40/230/12
xRay score0.80 (0.86)1.17 (1.11)0.23 (0.69)1.33 (1.07)
NSAID1-150 (+/−)13/36/812/114/8
DMARD1-150(+/−)1/156/88/150/12
Corticosteroids (+/−)5/116/82/210/12
  • 1-150 CRP = C reactive protein; NSAID = non-steroidal anti-inflammatory drug; DMARD = disease modifying antirheumatic drug.