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Table 1 Baseline characteristics of the incident rheumatoid arthritis cohort

From: Early medication use in new-onset rheumatoid arthritis may delay joint replacement: results of a large population-based study

Variable Number Percent or SD
Female 7,639 67.4
Age in years at cohort entry 65.3 14.5
Recipient of social assistance at cohort entrya 939 8.3
Urban residencea 8,884 78.4
High healthcare use at baseline 2981 26.3
Prior joint replacement 352 3.14
Comorbidities   
 Myocardial infarction 291 2.6
 Diabetes 1,668 14.7
 Osteoporosis 1,722 15.2
 Cerebrovascular disease 54 0.48
 Acute renal failure 314 2.8
 Chronic renal failure 298 2.6
 Coronary artery disease 1,952 17.2
 COPD-asthma 2,587 22.8
 Any type of cancer 1,326 11.7
 Osteoarthritis 3,469 30.6
 Charlson comorbidity 1.2 1.9
Drug use prior to cohort entry   
GC 4,360 38.5
 COXIBs 4,824 42.6
 NSAIDs 4,491 39.6
  1. COPD chronic obstructive pulmonary disease, GC glucocorticoids, COXIBs cyclooxygenase-2 inhibitors, NSAIDs nonselective nonsteroidal anti-inflammatory drugs
  2. aDefined by census tract data