Table 1

 Basic characteristics of healthy subjects and patients with systemic lupus erythematosus (SLE) and rheumatoid arthritis (RA)

CharacteristicsSLEHS (match SLE)RAHS (match RA)
Data are given as means (SEM)unless stated otherwise.
ESR, erythrocyte sedimentation rate; NA, not applicable; NM, not measured; SLEDAI, SLE Disease Activity Index.
Age (years)38.1 (2.1)37.1 (1.5)57.7 (1.7)51.5 (0.8)
Sex, female/male (%)24/8 (75/25)25/17 (60/40)52/10 (84/16)12/11 (52/48)
Disease duration (years)8.0 (1.5)NA9.7 (1.0)NA
Tender jointsNANA9.0 (0.6)NA
Swollen jointsNANA7.5 (0.6)NA
ESR (mm/1st h)25.0 (3.3)NM27.7 (2.4)NM
    Prednisolone, No (%)20 (63)NA34 (55)NA
    Prednisolone/day (mg)9.4 (3.4)NA4.3 (0.9)NA
    NSAID, No (%)13 (41)NA38 (62)NA
    Methotrexate, No (%)2 (6)NA43 (69)NA
    Azathioprine, No (%)12 (38)NA0 (0)NA
    Anti-TNF treatment, No (%)0 (0)NA38 (61)NA
    Leflunomide, No (%)0 (0)NA8 (13)NA
    Cyclophosphamide, No (%)2 (6)NA0 (0)NA
    Hydroxychloroquine, No (%)3 (9)NA4 (6)NA
    Sulfasalazine, No (%)0 (0)NA2 (3)NA