Table 1.

Demographic characteristics of MS cases at the onset of the disease in Tehran, Iran

Variables	N (%)
Sex
Male	5393 (24.99)
Female	16,187 (75.01)
Age
≤ 18	2023 (9.7)
19–24	5098 (24.7)
25–29	4807 (23.3)
30–34	3704 (18.0)
35–39	2395 (11.6)
40–44	1518 (7.4)
≥ 45	1091 (5.3)
Familial MS
Yes	2815 (13.4)
No	18,145 (86.6)