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Table 1 Clinical characteristics of the patients at the time of synovectomy/sampling

From: Identification of rheumatoid arthritis and osteoarthritis patients by transcriptome-based rule set generation

Patients (total number) Gender (male/female) Age (Years) Disease duration (years) RF (+/−) ESR (mm/1 hour) CRPa(mg/l) Number of ARA-criteria (RA) Concomitant medication (n)
Control group         
(n = 20) 15/5 54.7 ± 4.0 0.3 ± 0.3b n.d. n.d. n.d. n.a. NSAIDs (n = 1)
    (n.d. = 13)      None (n = 7)
         (n.d. = 12)
Osteoarthritis         
(n = 26) 4/22 71.0 ± 1.4 7.0 ± 1.3 3/18 22.4 ± 2.7 5.3 ± 1.5 0.2 ± 0.1 NSAIDs (n = 16)
    (n.d. = 1) (n.d. = 5) (n.d. = 5) (n.d. = 3)   None (n = 10)
Rheumatoid arthritis         
(n = 33) 8/25 57.0 ± 2.7 12.5 ± 2.0 21/7 42.7 ± 4.5 21.4 ± 4.1 5.2 ± 0.3 Prednisolone (n = 23)
     (n.d. = 7) (n.d. = 10) (n.d. = 3)   Methotrexate (n = 18)
         Sulfasalazine (n = 5)
Chloroquine (n = 2)
Leflunomide (n = 2)
Cyclosporine (n = 1)
Gold (n = 1)
NSAIDs (n = 22)
  1. For the parameters age, disease duration, ESR, CRP, and number of ARA criteria (RA), means ± standard error of the mean are given; for the remaining parameters, numbers are provided. ARA, American Rheumatism Association (now American College of Rheumatology); n.a., not applicable; n.d., not determined; NSAID, nonsteroidal anti-inflammatory drug; RA, rheumatoid arthritis; RF, rheumatoid factor; ESR, erythrocyte sedimentation rate; CRP, C-reactive protein.
  2. aNormal range, <5 mg /l.
  3. bDisease duration in joint trauma patients.