Table 3.

Prevalence of PFO among subjects with migraine selected from the literature including data from the current NOMAS study

STUDY	PFO Method	Migraine With Aura	Migraine Without Aura	NO Migraine
Del Sette et al. (10) Cerebrovas Dis. 1998	TCD	18/44 (41%)	NA	8/50 (16%)
Anzola et al. (9) Neurology. 1999	TCD	54/113 (48%)	12/53 (23%)	5/25 (20%)
Schwerzmann et al. (8) Neurology. 2005	TEE	44/93 (47%)	NA	16/93 (17%)
Dalla Volta et al. (31) J Headache Pain. 2005	TCD	161/260 (62%)	12/74 (16%)	NA
Carod-Artal FJ et al. (33) Cephalalgia. 2006	TCD	25/48 (51%)	32/93 (34%)	NA
Domitrz et al. (11) Headache. 2007	TCD	33/61 (54%)	15/60 (25%)	16/65 (25%)
NOMAS	TTE	26/140 (19%)	4/38 (11%)	138/923 (15%)