Characteristics at diagnosis among patients with new-onset RA overall and by calendar period of RA diagnosis, and in matched general population comparator subjects, expressed in n (%) if not stated otherwise
| Patients with RA | General population | |||||
| All n=17 512 | 1997–2001 n=2766 | 2002–2006 n=3960 | 2007–2011 n=5513 | 2012–2015 n=5273 | All n=78 847 | |
| Women | 11 958 (68.3) | 1923 (69.5) | 2710 (68.4) | 3778 (68.5) | 3547 (67.3) | 53 358 (67.7) |
| Age, mean (SD) | 58.2 (15.3) | 56.8 (15.4) | 57.5 (15.1) | 58.1 (15.2) | 59.5 (15.5) | 57.8 (15.5) |
| Age at diagnosis (years) <53 | 5540 (31.6) | 961 (34.7) | 1276 (32.2) | 1753 (31.8) | 1550 (29.4) | 25 779 (32.7) |
| 53–62 | 4381 (25.0) | 734 (26.5) | 1141 (28.8) | 1368 (24.8) | 1138 (21.6) | 19 687 (25.0) |
| 63–71 | 4034 (23.0) | 546 (19.7) | 780 (19.7) | 1327 (24.1) | 1381 (26.2) | 17 728 (22.5) |
| ≥72 | 3557 (20.3) | 525 (19.0) | 763 (19.3) | 1065 (19.3) | 1204 (22.8) | 15 653 (19.9) |
| Seropositive RA | 11 265 (64.3) | 1864 (67.4) | 2673 (67.5) | 3532 (64.1) | 3196 (60.6) | NA |
NA, not applicable; RA, rheumatoid arthritis.