The Prevalence of Familial Multiple Sclerosis in Saskatoon, Saskatchewan

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%)