Table 1.
Demographic and clinical characteristics of 706 RA patients at baseline according to ethnic group.
| Non-Hispanic White (n=272) | Hispanic (n=434) | P-value | |
|---|---|---|---|
| Demographics | |||
| Age, mean (SD) | 60.1 (12.7) | 52.0 (12.6) | ≤ 0.001 |
| Age at onset, mean (SD) | 47.4 (14.3) | 42.4 (13.3) | ≤ 0.001 |
| Male, n (%) | 111 (41%) | 109 (25%) | ≤ 0.001 |
| Nam-Powers, mean (SD) | 50.4 (20.0) | 28.7 (17.7) | ≤ 0.001 |
| Comorbid Conditions | |||
| Diabetes, n (%) | 16 (6%) | 76 (18%) | ≤ 0.001 |
| Hypertension, n (%) | 131 (48%) | 140 (32%) | ≤ 0.001 |
| Hypercholesterolemia, n (%) | 36 (13.2%) | 17 (4%) | ≤ 0.001 |
| Past Smoker, n (%) | 138 (51%) | 154 (36%) | ≤ 0.001 |
| Current Smoker, n (%) | 53 (20%) | 80 (18%) | 0.7 |
| BMI, mean (SD) | 26.9 (5.6) | 30.0 (6.8) | ≤ 0.001 |
| Charlson Comorbidity, mean (SD) | 1.91 (1.24) | 1.62 (1.15) | 0.002 |
| RA Manifestations | |||
| Tender joints, mean (SD) | 11.2 (11.2) | 17.0 (12.5) | ≤ 0.001 |
| Swollen joints, mean (SD) | 6.4 (6.5) | 8.1 (7.1) | ≤ 0.001 |
| Deformed joints, mean (SD) | 11.6 (11.6) | 9.3 (10.8) | 0.008 |
| RA duration, mean (SD) | 13.2 (10.8) | 9.7 (10.3) | ≤ 0.001 |
| ESR, mean (SD) | 34 (26) | 44 (26) | ≤ 0.001 |
| Sharp Score*, mean (SD) | 63.2 (64.3) | 66.2 (69.5) | 0.4 |
| Nodules, n (%) | 83 (31%) | 136 (31%) | 0.8 |
| Prednisone use, n (%) | 138 (51%) | 219 (50%) | 0.9 |
| Prednisone dose, mean (SD) | 6.3 (3.4) | 6.9 (4.0) | 0.1 |
| HLA-DRB1, n (%)** | 213 (80%) | 302 (71%) | 0.006 |
| Rheumatoid factor, n (%) | 200 (74%) | 363 (84%) | ≤ 0.001 |
*
There were 49 patients for which no x-ray radiograph was obtained. Therefore, the values shown are for a sample of 657 patients at baseline—252 Non-Hispanic Whites and 405 Hispanics.
**
There were 16 patients that were not HLA-typed. The values shown are for 690 patients at baseline with corrected percentages—265 Non-Hispanic Whites and 425 Hispanics.