Prevalence of RA in the total sample and by subgroups.
| Variables | Estimate | Cases | N* |
|---|---|---|---|
| Total | 0.6 (0.3–1.2) | 31 | 2988 |
| Sex | |||
| Male | 0.1 (0.0–0.5) | 4 | 1057 |
| Female | 1.0 (0.5–2.1) | 27 | 1931 |
| Age, yrs | |||
| 31–54 | 0.5 (0.2–1.6) | 8 | 1349 |
| 55+ | 0.8 (0.5–1.3) | 23 | 1639 |
| Educational level | |||
| Low | 0.7 (0.4–1.5) | 13 | 901 |
| Middle | 0.2 (0.1–0.5) | 14 | 1548 |
| High | 1.2 (0.3–4.7) | 2 | 515 |
| Civil status | |||
| Married | 0.8 (0.3–2.0) | 13 | 1336 |
| Single | 0.5 (0.2–1.1) | 7 | 556 |
| Stable couple | 0.1 (0.0–0.4) | 2 | 280 |
| Separated/divorced | 0.5 (0.1–1.8) | 4 | 395 |
| Widow | 0.6 (0.1–2.4) | 5 | 415 |
| Work status | |||
| Paid employment | 0.3 (0.1–1.4) | 4 | 1432 |
| Unemployed | 0.1 (0.0–0.9) | 1 | 66 |
| Housewife | 1.0 (0.3–3.4) | 9 | 615 |
| Retired | 0.6 (0.2–1.3) | 10 | 760 |
| Permanently disabled | 6.6 (2.5–16.3) | 6 | 51 |
| Student | 0 | 0 | 15 |
| Other | 3.4 (0.5–21.1) | 1 | 41 |
| Area of residence | |||
| Urban | 0.7 (0.3–1.3) | 28 | 2460 |
| Rural | 0.3 (0.1–0.8) | 3 | 528 |
↵* N corresponds to the denominator in prevalence calculations. RA: rheumatoid arthritis.