Table 1

 Clinical and serological characteristics of patients with RA and PsA

Rheumatoid arthritis (n = 27)Psoriatic arthritis (n = 18)
*Number of patients with radiological erosions at the time of arthroscopy.
Women, No (%)16 (59)8 (44)
Age (years), mean (SD)54.1 (15.6)44.9 (13.1)
Disease duration (months), mean (SD)60.3 (90)88.6 (82.1)
RF+, No (%)19 (70)0 (0)
HLA-B27 +, No (%)2 (7)1 (6)
Baseline erosions*, No (%)12 (44)6 (33)
ESR (mm/1st h), mean (SD)35.8 (31.2)43.7 (27.5)
CRP (mg/l), mean (SD)23 (35)26 (29)