Characteristics of the cohort with IP (n = 438)
| Patient characteristics | |
|---|---|
| Results are given as No (%) unless otherwise stated. | |
| IQR, interquartile range. | |
| Age (years), mean (SD) | 55.4 (14.4) |
| Sex (female) | 298 (68.0) |
| RF positive | |
| At baseline | 113 (25.8) |
| At 5 years | 166 (37.9) |
| RA criteria positive | |
| At baseline | 197 (45.0) |
| At 5 years | 343 (78.3) |
| Copies of shared epitope | |
| 0 | 176 (40.5) |
| 1 | 199 (45.7) |
| 2 | 60 (13.8) |
| Erosive at 5 years | 194 (44.3) |
| Median Larsen score at 5 years in those with erosions (IQR) | 25 (4–30) |