Table 1: Patient characteristics. Data given as mean (range), except where noted.

Patient group

Total

RA (ACPA+/RF+)

RA (ACPA-/RF+)

RA (ACPA-/RF-)

SpA

n (M/W)

193 (60/133)

 56 (18/38)

39 (9/30)

56 (17/39)

42 (16/26)

Age

59 (28-86)

 61 (37-79)

66 (32-86)

62 (37-84)

49 (26-70)

Disease Duration

13 (0-54)

14 (0-31)

17 (1-54)

10 (0-49)

9 (0-31)