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
| Â | 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) |