title: Impact of the lunar cycle on the incidence of aneurysmal subarachnoid haemorrhage: myth or reality?
abstract: OBJECTIVE
  To investigate the impact of the lunar cycle on the incidence of aneurysmal subarachnoid haemorrhages.
  
  
  METHODS
  We retrospectively identified all patients admitted to the department of neurosurgery during 1992 and 2004 suffering from aneurysmal subarachnoid haemorrhage. The onset of bleeding was compared with the lunar phase.
  
  
  RESULTS
  We did not observe any significant impact of the lunar cycle on the incidence of aneurysmal subarachnoid haemorrhage in 717 consecutive patients (p=0.84).
  
  
  CONCLUSIONS
  The impact of the lunar cycle on aneurysmal subarachnoid haemorrhage is a myth rather than reality.
authors.affiliation: Department of Anaesthesia, General Intensive Care Medicine and Pain Management, Medical University of Vienna, Waehringerguertel 18-20, 1090 Vienna, Austria. daniel.lahner@meduniwien.ac.at
authors.forename: Daniel
authors.initials: D
authors.lastname: Lahner
authors.forename: Franz
authors.initials: F
authors.lastname: Marhold
authors.forename: Andreas
authors.initials: A
authors.lastname: Gruber
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Schramm
mesh_terms: D001317:Austria / Q000453:epidemiology; D005260:Female; D005495:Folklore; D006801:Humans; D015994:Incidence; D002532:Intracranial Aneurysm / Q000150:complications* / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D016081:Moon; D012189:Retrospective Studies; D013345:Subarachnoid Hemorrhage / Q000453:epidemiology* / Q000209:etiology*; D014057:Tomography, X-Ray Computed