Classification of patients according to the 1987 American College of Rheumatology (ACR) and the 2010 ACR/European League Against Rheumatism criteria for RA
| Inclusion 1987 criteria, no. (%) | RA (1987): 364 (60%) | UA: 246 (40%) |
|---|---|---|
| Reclassification 2010 criteria, no. (%)* | RA (2010): 479 (79%) | UA (2010):122 (20%) |
| RA (2010) | UA (2010) | |
| RA (1987), no. (%) | 324/364 (89%) | 34/364 (9%) |
| UA no. (%) | 155/246 (63%) | 88/246 (36%) |
RA (1987), RA according to the 1987 classification criteria for RA.
UA, at least one swollen and one painful joint at risk for developing RA according to the rheumatologist.
RA (2010), included in trial as RA (1987) or UA, reclassified as RA according to the 2010 classification criteria for RA.
UA (2010), included in trial as RA (1987) or UA, not fulfilling the 2010 classification criteria for RA.
↵* Nine patients could not be classified because of insufficient data.
RA, rheumatoid arthritis; UA, undifferentiated arthritis.