To investigate associations between photophobia and seasonal variation of migraine.
In this cross-sectional study, migraineurs consecutively recruited were referred to a specialist center located above the Arctic Circle at 68-71 degrees North during a 2.5-year period. Data were obtained through a structured interview.
In total, 302 migraineurs with a mean (±SD) age of 35.5 (±12.6) years were included. Patients who reported seasonal variation of migraine (n = 90; 29.8%) also reported more often interictal photophobia than the others (61/90, 67.8% vs 92/212, 43.4%, P?