Variable | N (%) | p value | |||
---|---|---|---|---|---|
Rheumatoid arthritis cohort 1337 (9.1) | Comparison cohort 13,370 (90.9) | ||||
Sex | > 0.999 | ||||
Male | 302 | (22.6) | 3020 | (22.6) | |
Female | 1035 | (77.4) | 10,350 | (77.4) | |
Age interval at entry (years) | > 0.999 | ||||
20–54 | 721 | (53.9) | 7210 | (53.9) | |
> 55 | 616 | (46.1) | 6160 | (46.1) | |
Mean age (standard deviation), years | 53.2 | (13.4) | 53.2 | (13.4) | > 0.999 |
Median (lower and upper quartile), years | 53.0 | (44.0, 63.0) | 53.0 | (44.0, 63.0) | |
Salary grades for insurance (n = 14,689) | < 0.001 | ||||
≤ 19,000 | 611 | (46.0) | 7203 | (53.9) | |
19,001–24,000 | 483 | (36.4) | 4115 | (30.8) | |
≥ 24,001 | 234 | (17.6) | 2043 | (15.3) | |
Geographic region (n = 14,241) | 0.254 | ||||
Northern | 748 | (58.1) | 7880 | (60.8) | |
Central | 234 | (18.2) | 2140 | (16.5) | |
Southern | 278 | (21.6) | 2653 | (20.5) | |
Eastern | 28 | (2.2) | 280 | (2.2) | |
Comorbidities | |||||
Hypertension | 106 | (7.9) | 1022 | (7.6) | 0.710 |
Diabetes | 52 | (3.9) | 580 | (4.3) | 0.440 |
Congestive heart failure | 8 | (0.6) | 62 | (0.5) | 0.495 |
Chronic pulmonary disease | 40 | (3.0) | 271 | (2.0) | 0.019 |
Cancer | 13 | (1.0) | 235 | (1.8) | 0.033 |
Dyslipidemia | 40 | (3.0) | 327 | (2.4) | 0.222 |
Coronary artery disease | 3 | (0.2) | 46 | (0.3) | 0.469 |
Prior myocardial infarction | 1 | (0.1) | 10 | (0.1) | > 0.999 |
Peripheral vascular disease | 1 | (0.1) | 18 | (0.1) | 0.561 |
Cerebrovascular disease | 25 | (1.9) | 230 | (1.7) | 0.689 |
Dementia | 1 | (0.1) | 35 | (0.3) | 0.187 |
Musculoskeletal disordersa | 60 | (4.5) | 50 | (0.4) | < 0.001 |
Peptic ulcer disease | 68 | (5.1) | 337 | (2.5) | < 0.001 |
Chronic kidney disease | 16 | (1.2) | 114 | (0.9) | 0.200 |
Liver disease | 22 | (1.6) | 174 | (1.3) | 0.296 |