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A schematic depiction of the participant selection method employed in this study. From the original pool of 514,866 participants in the Korean National Health Insurance Service-Health Screening Cohort (KNHIS-HSC) database, a detailed matching process paired 38,957 migraine sufferers with 155,828 control participants, considering propensity scores. ICD-10, International Classification of Diseases, Tenth Revision; BMI, body mass index; CCI, Charlson Comorbidity Index.
