Table 1

Characteristics of the early RA cohort* at diagnosis

Year of diagnosisOverall
1999–20002001–20022003–20042005–20062007
N5296476887823833029
Women (n (%))381 (72)490 (76)489 (71)571 (73)294 (77)2225 (73)
Age (years)
 Mean (SD)46 (11)47 (10)46 (11)47 (11)46 (10)47 (11)
 Median (range)49 (19–60)49 (20–60)49 (19–60)50 (19–60)49 (19–60)49 (19–60)
Clinical characteristics (mean (SD))
 Health Assessment Questionnaire1.0 (0.6)1.0 (0.6)1.0 (0.6)1.0 (0.6)1.0 (0.6)1.0 (0.6)
 DAS284.9 (1.3)5.1 (1.2)5.3 (1.2)5.1 (1.3)5.0 (1.4)5.1 (1.3)
 Tender joint count7.5 (5.9)7.9 (6.4)8.3 (6.0)8.3 (6.1)7.7 (5.8)8.0 (6.1)
 Swollen joint count8.2 (5.3)8.6 (5.3)8.9 (5.4)8.7 (5.6)7.9 (5.2)8.6 (5.4)
 CRP (median)131315101012
Biologics
 % on biologics within 1 year of RA diagnosis26 (5%)60 (9%)141 (20%)121 (15%)57 (15%)405 (13%)
Education
 ≤9 years115 (22%)122 (19%)118 (17%)144 (18%)65 (17%)564 (19%)
 10–12 years253 (48%)311 (48%)352 (51%)392 (50%)199 (52%)1507 (50%)
 >12 years141 (27%)194 (30%)210 (31%)239 (31%)118 (31%)902 (30%)
Missing20 (4%)20 (3%)8 (1%)7 (1%)1 (0%)56 (2%)
  • * Identified in the Swedish Rheumatology Quality Register.8 Patients included at diagnosis if registered as early (as opposed to established) RA and with no visit with an RA diagnosis in the National Patient Register prior to the diagnosis date.

  • RA, rheumatoid arthritis.