Table 2.
Characteristics of the study population at baseline (1999) [n (%)].
| Characteristic | At-risk cohort (n = 640,041) | RA-ICD-9 (n = 3,333) | RA-prescription (n = 2,692) | RA-specialist (n = 1,911) |
|---|---|---|---|---|
| Age (years) | ||||
| 45–54 | 257,061 (40.2) | 934 (28.0) | 687 (25.5) | 567 (29.7) |
| 55–64 | 160,246 (25.0) | 820 (24.6) | 663 (24.6) | 503 (26.3) |
| 65–74 | 137,130 (21.4) | 955 (28.7) | 804 (29.9) | 534 (27.9) |
| 75–84 | 85,604 (13.4) | 624 (18.7) | 538 (20.0) | 307 (16.1) |
| Sex | ||||
| Female | 335,062 (52.4) | 2,218 (66.6) | 1,854 (68.9) | 1,307 (68.4) |
| Male | 304,979 (47.6) | 1,115 (33.4) | 838 (31.3) | 604 (31.6) |
| Neighborhood SES (quintile) | ||||
| 1 | 126,005 (19.7) | 732 (22.0) | 580 (21.6) | 378 (19.8) |
| 2 | 125,335 (19.6) | 748 (22.4) | 551 (20.5) | 380 (19.9) |
| 3 | 123,928 (19.4) | 626 (18.8) | 510 (19.0) | 354 (18.5) |
| 4 | 131,334 (20.5) | 624 (18.7) | 539 (20.0) | 404 (21.1) |
| 5 | 131,871 (20.6) | 596 (17.9) | 506 (18.8) | 391 (20.5) |
| Missing | 1,568 (0.2) | 7 (0.2) | 6 (0.2) | 4 (0.2) |