title: Temperature variation in the 24 hours before the initial symptoms of stroke.
abstract: A few studies have performed to evaluate the temperature variation influences over on the stroke rates in Brazil.
  
  
  METHODS
  176 medical records of inpatients were analyzed after having had a stroke between 2004 and 2006 at Hospital Israelita Albert Einstein. The temperature preceding the occurrence of the symptoms was recorded, as well as the temperature 6, 12 and 24 hours before the symptoms in 6 different weather substations, closest to their houses in São Paulo.
  
  
  RESULTS
  Strokes occurred more frequently after a variation of 3 C between 6 and 24 hours before the symptoms. There were most hospitalizations between 23-24 C.
  
  
  CONCLUSIONS
  Incidence of stroke on these patients was increased after a variation of 3 masculine Celsius within 24 hours before the ictus. The temperature variations could be an important factor in the occurrence of strokes in this population.
authors.affiliation: Hospital Israelita Albert Einstein, São Paulo, SP, Brazil. fernandomorgadinho@hotmail.com
authors.forename: Fernando Morgadinho Santos
authors.initials: FM
authors.lastname: Coelho
authors.forename: Bento Fortunato Cardoso dos
authors.initials: BF
authors.lastname: Santos
authors.forename: Miguel
authors.initials: M
authors.lastname: Cendoroglo Neto
authors.forename: Luis Fernando
authors.initials: LF
authors.lastname: Lisboa
authors.forename: Adriana Serra
authors.initials: AS
authors.lastname: Cypriano
authors.forename: Tania Oliveira
authors.initials: TO
authors.lastname: Lopes
authors.forename: Marina Jorge de
authors.initials: MJ
authors.lastname: Miranda
authors.forename: Ana Maria H
authors.initials: AM
authors.lastname: Avila
authors.forename: Jonas Bordin
authors.initials: JB
authors.lastname: Alonso
authors.forename: Hilton Siqueira
authors.initials: HS
authors.lastname: Pinto
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001938:Brazil / Q000453:epidemiology; D006801:Humans; D015994:Incidence; D008875:Middle Aged; D015995:Prevalence; D012189:Retrospective Studies; D012621:Seasons; D020521:Stroke / Q000453:epidemiology* / Q000209:etiology; D013696:Temperature; D013997:Time Factors