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. 2013 Sep 23;14(1):78. doi: 10.1186/1129-2377-14-78

Table 2.

Prevalence of internal jugular vein valve insufficiency

Study groups Bilateral or unilateral Bilateral Left-sided Right-sided
M n = 70
36 (51%)*
8 (11%)*
17 (24%)*
27 (39%)*
MO n = 44
23 (52%)*
7 (16%)*
13 (30%)*
17 (39%)*
MA n = 26
13 (50%)*
1 (4%)*
4 (15%)*
10 (38%)*
Control group n = 42 17 (40%)* 5 (12%)* 12 (28%)* 10 (24%)*

M, all patients with migraine; MO, patients with migraine without aura;

MA, patients with migraine with aura;

*no difference between the study groups p > 0.05.