Table 1 Characteristics of the RA-discordant twin pairs
From: Increased DNA methylation variability in rheumatoid arthritis-discordant monozygotic twins
Characteristic | RA (n = 79) | Non-RA (n = 79) | p value |
|---|---|---|---|
*Age (years), mean (SD) | 54.2 (12.2) | 54.2 (12.2) | Â |
Female, n (%) | 67 (86) | 67 (86) | Â |
*Disease duration (years), median (IQR) | 9.8 (5.1, 17.2) | – |  |
Anti-CCP and/or RF positive, n (%) | 46 (59%) | 7 (9%) | Â |
*DMARDs, n (%) | 41 (52%) | – |  |
Smoking status | Â | Â | 0.53 |
 Current, n (%) | 15(19) | 12 (16) |  |
 Past, n (%) | 26 (33) | 22(28) |  |
 Never, n (%) | 37(49) | 44 (56) |  |
**Cell type | |||
 CD8T | 0.05 | 0.05 | 0.73 |
 CD4T | 0.24 | 0.19 | 0.16 |
 Natural killer | 0.06 | 0.06 | 0.99 |
 B cell | 0.06 | 0.05 | 0.61 |
 Monocyte | 0.08 | 0.07 | 0.15 |
 Granulocyte | 0.51 | 0.57 | 0.25 |