Table 1 Demographic characteristics of rheumatoid arthritis patients and controls in the MyEIRA study population
Characteristic | Malay | Chinese | Indian | Others | ||||
|---|---|---|---|---|---|---|---|---|
| Â | RA (n= 516) | Controls (n= 986) | RA (n= 255) | Controls (n= 206) | RA (n= 379) | Controls (n= 285) | RA (n= 88) | Controls (n= 93) |
Female | 86.8 | 88.1 | 83.5 | 86.9 | 87.9 | 84.6 | 84.1 | 90.4 |
Age (years) | 46 (11.8) | 46 (11.4) | 52 (11.2) | 52 (11.3) | 48 (11.6) | 49 (10.6) | 49 (12.1) | 45 (11.7) |
ACPA-positive | 60.5 | 2.4 | 66.3 | 3.4 | 67.3 | 2.1 | 70.5 | 1.1 |
IgM RF-positive | 47.5 | 3.8 | 49.4 | 3.4 | 55.9 | 5.3 | 62.5 | 6.4 |
IgG RF-positive | 48.4 | 6.3 | 49.4 | 6.8 | 54.1 | 6.3 | 64.8 | 7.4 |
DRB1 SE-positivea | 35.5 | 13.1 | 36.5 | 12.1 | 48.5 | 30.2 | 40.9 | 17.0 |