Baseline characteristics of study population with rheumatoid arthritis in CORRONA (n=10 156)
| N (%) or median (Inter-quartile range) | |
|---|---|
| Age, years, median | 59 (50, 69) |
| Female gender | 7610 (75.0%) |
| Duration of follow-up, months, median | 23 (11, 34) |
| Rheumatoid arthritis related variables | |
| RA duration, <24 months | 1911 (18.9%) |
| 24+ months | 8187 (81.1%) |
| Seropositive* | 4852 (72.2%) |
| Radiographic joint erosions | 3445 (50.7%) |
| Subcutaneous nodules | 2019 (20.1%) |
| Prior total joint arthroplasty | 3067 (30.4%) |
| Modified HAQ, <1 | 8707 (87.8%) |
| 1–2 | 1124 (11.3%) |
| 2+ | 86 (0.9%) |
| Clinical Disease Activity Index, median | 11 (2, 19) |
| Cardiovascular disease related variables | |
| History of MI | 376 (3.7%) |
| History of cardiovascular disease | 859 (8.5%) |
| History of diabetes | 722 (7.1%) |
| History of hyperlipidemia drug use | 937 (9.2%) |
| History of hypertension | 3029 (29.8%) |
| Current tobacco use | 1601 (16.1%) |
| Family history of premature MI | 519 (5.1%) |
↵* Seropositive refers to either rheumatoid factor or antiCCP antibody. Radiographic joint erosions were based on the rheumatologist's report. History of CV disease includes a subject's report of myocardial infarction, stroke, transient ischemic attack, angina or coronary intervention. Missing data exist for some variables: RA duration 58, serologic status 3549, radiographic erosions 3549, subcutaneous nodules 104, modified HAQ 81 and Clinical Disease Activity Index 772.
HAQ, health assessment questionnaire; IQR, interquartile range; MI, myocardial infarction; RA, rheumatoid arthritis.