Number of cases and controls in EIMS and GEMS
| Case–control status | Included | Data on disease course, smoking, alcohol and snuff use | Data on disease course and sun exposure | Data on disease course and adolescent BMI (index age >19 years) | Data on disease course, DRB1 and smoking | Data on disease course, DRB1 and adolescent BMI | Data on disease course, DRB1 and EBNA-1 antibody levels |
| Relapsing-onset MS | 8965 | 7520 | 6840 | 7206 | 6109 | 5899 | 4419 |
| Progressive-onset MS | 540 | 489 | 517 | 456 | 439 | 398 | |
| Controls | 11 479 | 11 386 | 10 590 | 10 351 | 6683 | 6526 | 5144 |
BMI, body mass index; EBNA-1, Epstein-Barr virus nuclear antigen-1; EIMS, epidemiological investigation of multiple sclerosis; GEMS, genes and environment in multiple sclerosis; MS, multiple sclerosis.