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Clinical and demographic data
| Characteristics | Cases, n (%) | Controls, n (%) |
|---|---|---|
| Male | 1493 (35.3) | 803 (44.6) |
| Female | 2738 (64.7) | 999 (55.4) |
| Caucasians | 4238 (100) | 1811 (100) |
| Erosions | 697 (68.7) | NA |
| Nodules | 750 (35) | NA |
| RF positive | 1781 (71) | NA |
| Anti-CCP positive | 1100 (66.5) | NA |
Clinical and demographic data were not available for all individuals. Percentages are given as a percentage of the data available.
