preliminary data from a blind direct interview family study indicate a significantly higher risk for simple phobia among first-degree relatives ( n = 49 ) of simple phobic probands ( who had no other anxiety disorder ) as compared with first-degree relatives ( n = 119 ) of never mentally ill controls ( 31 % vs 11 % , relative risk = 3.3 ) .
C0236801
simple phobia
C0003469
anxiety disorder