Demographic characteristics of the patients with RA and AS
| RA | AS | p Values | |
|---|---|---|---|
| *Univariately tested; †multivariately tested to adjust for age and sex (if applicable); ‡multivariately tested to adjust for sex differences (if applicable). | |||
| Correlation between current age and age at diagnosis was 0.64. | |||
| Number of patients | 1056 | 658 | |
| Men* (%) | 27.7 | 70.1 | <0.001 |
| Mean (SD) age* (years) | 49.0 (8.3) | 43.5 (9.4) | <0.001 |
| Men | 50.5 (7.5) | 44.0 (9.3) | <0.001 |
| Women | 48.4 (8.4) | 42.5 (9.5) | <0.001 |
| Highest attained level of education, total† (%) | |||
| Primary school | 49.1 | 41.7 | 0.082 |
| Secondary school | 38.8 | 38.9 | |
| High vocational school/university | 12.1 | 19.4 | |
| Highest attained level of education, men†: | |||
| Primary school | 52.7 | 40.7 | 0.018 |
| Secondary school | 34.5 | 36.7 | |
| High vocational school/university | 12.8 | 22.6 | |
| Highest attained level of education, women†: | |||
| Primary school | 48.1 | 44.1 | 0.305 |
| Secondary school | 40.4 | 44.1 | |
| High vocational school/university | 11.9 | 11.8 | |
| Paid employment† (%) | 35.7 | 64.0 | 0.003 |
| Men | 56.7 | 70.7 | 0.157 |
| Women | 27.7 | 48.2 | 0.003 |
| Work disability (fully or partially)† (%) | 40.3 | 32.4 | <0.001 |
| Men | 59.5 | 34.1 | <0.001 |
| Women | 33.1 | 28.4 | 0.144 |
| Mean (SD) age at diagnosis‡ (years) | 37.2 (10.6) | 31.3 (9.4) | <0.001 |
| Men | 39.6 (9.2) | 31.2 (9.5) | <0.001 |
| Women | 36.3 (10.6) | 31.4 (8.8) | 0.001 |
| Mean (SD) disease duration† (years) | 11.9 (9.1) | 12.3 (8.0) | <0.001 |
| Men | 11.1 (7.9) | 12.8 (8.4) | <0.001 |
| Women | 12.3 (9.1) | 11.0 (7.0) | 0.320 |
| Disease activity (RADAI, 0–10), mean (SD) | 4.2 (2.2) | ||
| Men | 4.2 (2.2) | ||
| Women | 4.2 (2.1) | ||
| Disease activity (BASDAI, 0–10), mean (SD) | 3.9 (2.4) | ||
| Men | 3.7 (2.4) | ||
| Women | 4.4 (2.4) | ||
| Comorbidity† (%) | 47.4 | 40.1 | 0.316 |
| Men | 45.9 | 37.7 | 0.717 |
| Women | 47.9 | 45.7 | 0.203 |
| Duration of morning stiffness (min), total† (%) | |||
| 0–14 | 26.6 | 36.1 | <0.001 |
| 15–29 | 18.8 | 22.2 | |
| 30–59 | 26.0 | 24.8 | |
| 60–119 | 13.9 | 16.6 | |
| ⩾120 | 14.7 | 0.3 | |
| Duration of morning stiffness (min), men† (%) | |||
| 0–14 | 24.8 | 36.0 | <0.001 |
| 15–29 | 17.2 | 24.0 | |
| 30–59 | 23.7 | 24.7 | |
| 60–119 | 16.6 | 15.1 | |
| ⩾120 | 17.7 | 0.2 | |
| Duration of morning stiffness (min), women† (%) | |||
| 0–14 | 27.3 | 36.3 | 0.001 |
| 15–29 | 19.4 | 17.9 | |
| 30–59 | 26.9 | 25.3 | |
| 60–119 | 12.9 | 20.0 | |
| ⩾120 | 13.6 | 0.5 | |