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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Duration, frequency, recency, and type of migraine and the risk of ischaemic stroke in women of childbearing age.
Journal of Neurology, Neurosurgery, and Psychiatry 2002 December
BACKGROUND: Migraine is recognised increasingly as a risk factor for ischaemic stroke in women of childbearing age. Migraine with aura poses a higher risk than migraine without aura.
OBJECTIVE: To investigate further the effect of duration, frequency, recency, and type of migraine on the risk of ischaemic stroke.
METHODS: Additional analyses of a previously reported multicentre case-control study of the relation between stroke and migraine in women aged 20-44 years.
RESULTS: Among 86 cases of ischaemic stroke and 214 controls, the adjusted risk of ischaemic stroke was significantly associated with: (1) migraine of more than 12 years duration, odds ratio (OR) 4.61 (1.27-16.8); (2) initial migraine with aura, OR 8.37 (2.33-30.1); (3) particularly if attacks were more frequent than 12 times per year, OR 10.4 (2.18-49.4). In no case did correction for oral contraception usage significantly alter these odds ratios. Increasing risk of ischaemic stroke was related to a change to increased frequency of headaches (trend p <or= 0.03).
CONCLUSIONS: These data support earlier reports of a relation between ischaemic stroke and migraine with aura. The risk seems particularly high in those whose initial migraine type involved aura occurring more than 12 times per year.
OBJECTIVE: To investigate further the effect of duration, frequency, recency, and type of migraine on the risk of ischaemic stroke.
METHODS: Additional analyses of a previously reported multicentre case-control study of the relation between stroke and migraine in women aged 20-44 years.
RESULTS: Among 86 cases of ischaemic stroke and 214 controls, the adjusted risk of ischaemic stroke was significantly associated with: (1) migraine of more than 12 years duration, odds ratio (OR) 4.61 (1.27-16.8); (2) initial migraine with aura, OR 8.37 (2.33-30.1); (3) particularly if attacks were more frequent than 12 times per year, OR 10.4 (2.18-49.4). In no case did correction for oral contraception usage significantly alter these odds ratios. Increasing risk of ischaemic stroke was related to a change to increased frequency of headaches (trend p <or= 0.03).
CONCLUSIONS: These data support earlier reports of a relation between ischaemic stroke and migraine with aura. The risk seems particularly high in those whose initial migraine type involved aura occurring more than 12 times per year.
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