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Table 1 Baseline characteristics of rheumatoid arthritis cases and controls

From: Risk of rheumatoid arthritis diagnosis in statin users in a large nationwide US study

  Cases (n = 16,363) Controls (n = 16,363)
Age (years), mean (SD) 58.2 (14.1) 58.2 (14.1)
Sex, n (%)
 Female 11565 (70.7) 11565 (70.7)
 Male 4798 (29.3) 4798 (29.3)
Race/ethnicity, n (%)
 Asian 437 (2.7) 640 (3.9)
 Black 1572 (9.6) 1542 (9.4)
 Hispanic 1822 (11.1) 1448 (8.8)
 White 12039 (73.6) 12147 (74.2)
 Other/unknown 493 (3.0) 586 (3.6)
Region, n (%)
 Midwest 4185 (25.6) 4185 (25.6)
 Northeast 1800 (11.0) 1800 (11.0)
 South 8185 (50.0) 8185 (50.0)
 West 2193 (13.4) 2193 (13.4)
Baseline insurance coverage (years), mean (SD) 4.1 (3.0) 4.1 (3.0)
Disease history, n (%)
 Hyperlipidemia 7848 (48.0) 6935 (42.4)
 Myocardial infarction 378 (2.3) 423 (2.6)
 Cerebrovascular disease 1086 (6.6) 1038 (6.3)
 Congestive heart failure 793 (4.8) 887 (5.4)
 Peripheral vascular disorders 1326 (8.1) 1177 (7.2)
 Diabetes 3331 (20.4) 3092 (18.9)
 Hypothyroidism 3481 (21.3) 2687 (16.4)
 Liver disease 783 (4.8) 676 (4.1)
 Metastatic cancer 74 (0.5) 240 (1.5)
 Obesity 2466 (15.1) 1917 (11.7)
 Renal failure 862 (5.3) 993 (6.1)
Charlson index score, mean (SD) 2.2 (1.9) 2.3 (2.2)
Elixhauser index score, mean (SD) 2.4 (2.3) 2.2 (2.5)