Table 4

Prevalence of migraine before and after percutaneous PFO closure for other reasons, in per cent

			Before closure		After closure
	n	Follow-up (months)	Migraine	Migraine with aura	Migraine	Migraine with aura
Wilmshurst10	37	17	57	43	30^*	24^*
Schwerzmann^† 11	215	24	22	17	20	15
Post12	66	6	39	18	16^*	5^*
Azarbal13	66	3	45	30	17	8
Reisman14	162	9	35	24	≈15	Not reported
Giardini15	131	20	Not reported	27	Not reported	5^*
Slavin16	120	30	42	33	≈14	≈10
Rigatelli17	10	11	100	100	0	0
Dubiel18	191	38	24	13	18	8
Morandi19	17	6	100	47	71^*	12^*
Anzola20	50	12	100	66	64^*	44^*
Vigna21	53	6	100	43	66^*	19^*
Present study	603	59	25	16	16^*	10^*

↵* p<0.05.
↵† 29 migraine patients who received an Amplatzer PFO Occluder were also included in the present study.