Migraine and frequent tension-type headache are not associated with multiple sclerosis in a Norwegian case-control study
Abstract
Background Inconsistent results have been obtained with regard to headache comorbidity in multiple sclerosis (MS). Objective Investigate the one-year prevalence of migraine and tension-type headache (TTH) in Norwegian MS patients and relate this to clinical parameters. Methods A questionnaire concerning headache was administered to 756 MS patients and 1090 controls and used to determine the one-year prevalence of migraine and frequent TTH. Results No significant differences were seen between patients and controls or between patients with different disease course. Less migraine was observed in patients with Expanded Disability Status Scale score (EDSS) ≥4.0. Conclusions This case-control study does not support an association between migraine or TTH and MS.
How strong is the evidence?
Evidence Hub reads this as a case-control, done in people. Its evidence level is 4 of 5 (Low · observational). Observational designs can show an association but not prove cause. Reported size: 756 participants or records.
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