Patient group | n | Always negative | Positive at initial assessment;negative at follow up | Negative at initial assessment;positive at follow up | Always positive |
---|---|---|---|---|---|
RA RF+ | 68 | 22 (32%) | 17 (25%) | 15 (22%) | 14 (21%) |
RA RF- | 35 | 32 (91%) | 1 (3%) | 0 (0%) | 2 (6%) |
SpA | 38 | 32 (84%) | 5 (13%) | 1 (3%) | 0 (0%) |
UA | 75 | 64 (85%) | 8 (11%) | 1 (2%) | 2 (3%) |