Table 1

Demographic data of patients with RA and non-RA controls

Patients with RA (n=13779)Non-RA patients (n=137790)p Value
Female10659 (77.4)106590 (77.4)1.000
Age group (years)1.000
 16–25484 (3.5)4840 (3.5)
 26–351187 (8.6)11870 (8.6)
 36–452577 (18.7)25770 (18.7)
 46–553896 (28.3)38960 (28.3)
 56–652864 (20.8)28640 (20.8)
 >652771 (20.1)27710 (20.1)
Geographical region<0.001
 Northern5654 (41.0)58329 (42.3)
 Central2878 (20.9)26746 (19.4)
 Southern4502 (32.7)46412 (33.7)
 Eastern745 (5.4)6303 (4.6)
  • Results are shown as number (%).

  • RA, rheumatoid arthritis.