Headache
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Multicenter Study
Validity and reliability of the migraine-specific quality of life questionnaire (MSQ Version 2.1).
To assess the scaling properties, reliability, and validity of the revised Migraine-Specific Quality of Life Questionnaire (MSQ) (Version 2.1) ⋯ The MSQ is a reliable instrument in the assessment of quality of life for patients with migraine with items that can be summed without weights. The MSQ has demonstrated evidence of construct validity.