Table 1 Characteristics at start of first tumour necrosis factor (TNF) antagonist treatment in the Swedish ARTIS register cohort of 4167 patients with rheumatoid arthritis (RA) starting treatment with TNF antagonists in 1999–2003, and in the subset thereof who had a pre‐treatment hospitalisation with RA.
| All anti‐TNF 1998–2003 | Anti‐TNF 1998–2003, also in Inpatient Register RA cohort | |
|---|---|---|
| Overall | 4167 (100%) | 2692 (100%) |
| Sex | ||
| Males | 1015 (24%) | 581 (22%) |
| Females | 3152 (75%) | 2111 (78%) |
| Age at entry (years) | ||
| 0–49 | 1343 (32%) | 727 (27%) |
| 50–74 | 2603 (62%) | 1778 (66%) |
| 75+ | 221 (5.3%) | 187 (7.0%) |
| Year of first anti‐TNF start | ||
| 1998–2000 | 1633 (39%) | 1221 (45%) |
| 2001–2002 | 1390 (33%) | 848 (32% |
| 2003 | 1144 (27%) | 623 (23%) |
| RA duration at start (years) | 12.1 (9.7) | 15.0 (13.3) |
| DAS28 at start | 5.63 (5.72) | 5.74 (5.83) |
| HAQ at start | 1.43 (1.45) | 1.57 (1.63) |
| Year of birth | ||
| 1900–1919 | 38 (0.9%) | 33 (1.2%) |
| 1920–1939 | 1203 (29%) | 924 (34%) |
| 1940–1959 | 2133 (52%) | 1335 (50%) |
| 1960–1979 | 754 (18%) | 388 (14%) |
| 1980– | 39 (0.9%) | 12 (0.5%) |
| Married | 2410 (59%) | 1636 (61%) |
DAS28, Disease Activity Score 28; HAQ, Health Assessment Questionnaire.