title: Meteorologic parameters and migraine headache: ED study.
abstract: OBJECTIVE
  Migraine is common in society and is one of the primary causes of chronic headache with episodes. In this study, we aimed to determine the role of meteorologic parameters and moon phase on triggering migraine attacks and effects on the number of patients presenting to the emergency department with migraine headaches.
  
  
  METHODS
  Patients admitted to the emergency department due to a migraine headache during a 1-year period were studied retrospectively. Correlation between moon phases, pressure, temperature, humidity, wind speed values of meteorologic observation, and recording station located in the same city and daily number of patients was analyzed.
  
  
  RESULTS
  A total of 3491 patients, of whom 72% (n = 2518) were women, were enrolled. The average daily number of patients was 9.6 ± 4 (3-24). A statistically significant correlation was found between the number of daily patients and daily maximum temperature (P = .005), mean temperature (P = .013), minimum temperature (P = .041), and daily temperature change (P = .003). In addition, a negative correlation was found between the daily number of patients presenting to the emergency department and daily relative humidity (in percentage; P = .031). No significant relationship was found between moon phases and the number of patients.
  
  
  CONCLUSIONS
  We have determined that the number of patients admitted to the emergency department with migraine headache has increased with high temperature and low humidity and that there is no relationship between the number of patients and moon phases.
authors.affiliation: Department of Emergency Medicine, Firat University School of Medicine, Elazig, Turkey. Electronic address: drmylmz@hotmail.com.
authors.forename: Mustafa
authors.initials: M
authors.lastname: Yilmaz
authors.affiliation: Department of Emergency Medicine, Firat University School of Medicine, Elazig, Turkey. Electronic address: drmhtp@yahoo.com.
authors.forename: Mehtap
authors.initials: M
authors.lastname: Gurger
authors.affiliation: Department of Emergency Medicine, Firat University School of Medicine, Elazig, Turkey. Electronic address: metinatescelik@yahoo.com.
authors.forename: Metin
authors.initials: M
authors.lastname: Atescelik
authors.affiliation: Department of Emergency Medicine, Firat University School of Medicine, Elazig, Turkey. Electronic address: musyildiz2003@yahoo.com.
authors.forename: Mustafa
authors.initials: M
authors.lastname: Yildiz
authors.affiliation: Department of Emergency Medicine, Inonu University School of Medicine, Malatya, Turkey. Electronic address: sukrugurbuz@gmail.com.
authors.forename: Sukru
authors.initials: S
authors.lastname: Gurbuz
mesh_terms: D000328:Adult; D015331:Cohort Studies; D004636:Emergency Service, Hospital; D005260:Female; D006801:Humans; D006813:Humidity; D008297:Male; D008685:Meteorological Concepts; D008875:Middle Aged; D008881:Migraine Disorders / Q000453:epidemiology*; D016081:Moon; D012189:Retrospective Studies; D013696:Temperature; D014421:Turkey / Q000453:epidemiology