Table 2 Baseline characteristics of study subjects
From: Validation of rheumatoid arthritis diagnoses in health care utilization data
Algorithms | A. At least 2 claims for RA | B. At least 3 claims for RA | C. At least 2 claims from a rheumatologista | No claims for RA |
|---|---|---|---|---|
Number | 131 | 110 | 84 | 39 |
Age in years, mean (SD) | 79.1 (6.7) | 78.8 (6.6) | 78.7 (7.0) | 80.1 (8.4) |
Females, number (percentage) | 115 (87.8) | 96 (87.3) | 73 (86.9) | 26 (66.7) |
Caucasians, number (percentage) | 129 (98.5) | 109 (99) | 83 (98.8) | 38 (97.4) |
Comorbidity index, mean (SD) | 2.6 (2.3) | 2.6 (2.3) | 2.7 (2.4) | 1.8 (2.5) |
Comorbidity index >0, number (percentage) | 109 (83.2) | 92 (83.6) | 72 (85.7) | 20 (51.3) |
Rheumatology visits, mean (SD) | 1.9 (3.6) | 2.2 (3.8) | 3.0 (4.1) | 0 (0) |
DMARD use, number (percentage) | 58 (44.3) | 56 (50.9) | 45 (53.6) | 1 (2.6) |