Table 1.
Familial multiple sclerosis. Frequencies and percentage of total familial cases, the number of affected relatives in each family, and the total number of relatives, in the years of follow-up.
| Number of affected relatives in family | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 6 | 7 | 8 | Total relatives | Total cases/150 | |
| Number of families | 22 | 3 | 1 | — | — | — | 31 | 26 (17.3%) | |
| Years of follow-up | |||||||||
| 10 years | 22 | 5 | 1 | — | — | — | 35 | 28 (18.7%) | |
| 20 years | 28 | 8 | 5 | 1 | — | — | — | 63 | 42 (28.0%) |
| 25 years | 31 | 12 | 5 | 1 | — | — | 69 | 49 (32.7%) | |
| 30 years | 31 | 10 | 4 | 2 | 2 | 83 | 49 (32.7%) | ||
| 35 years | 31 | 10 | 4 | 2 | — | 1 | 1 | 86 | 49 (32.7%) |