Clinical characteristics of the unmatched study population.
| Characteristics | Psoriatic Arthritis, n = 2481 | Rheumatoid Arthritis, n = 17,107 | p |
|---|---|---|---|
| Age, yrs, mean (SD) | 51.9 (12.8), n = 2470 | 58.5 (13.6), n = 17,009 | < 0.001 |
| Disease duration, yrs, mean (SD) | 8.5 (8.9), n = 2451 | 9.6 (9.8), n = 16,963 | < 0.001 |
| Body mass index, mean (SD) | 32.1 (8.3), n = 2346 | 29.8 (7.9), n = 15,827 | < 0.001 |
| Female, % | 52.0, n = 2477 | 75.5, n = 17,081 | < 0.001 |
| RF positive, % | 11.6, n = 773 | 71.0, n = 9431 | < 0.001 |
| Smoking status, % | 14.0, n = 2418 | 16.3, n = 16,603 | 0.004 |
| College education, % | 63.0, n = 2354 | 51.0, n = 16,097 | < 0.001 |
| Any DMARD use, % | 86.7, n = 2481 | 90.4, n = 17,107 | < 0.001 |
| Prednisone use, % | 14.6, n = 2470 | 36.9, n = 16,917 | < 0.001 |
| Biologic use, % | 51.3, n = 2481 | 43.6, n = 17,107 | < 0.001 |
| Estrogen use, % | 4.2, n = 2481 | 5.9, n = 17,107 | < 0.001 |
DMARD: disease-modifying antirheumatic drug; RF: rheumatoid factor.