13 Although a decreasing trend in the male/female ratio over time was suggested, the male-to-female ratio is still high, especially in Asian studies. 6 , 24 Furthermore, considering the female predominance of migraine and other primary headache disorders, scoring for the male sex may contribute to the ability to discriminate between CH and migraine patients.
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Development and Validation of the Cluster Headache Screening Questionnaire.
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