title: Influence of weather on daily hospital admissions for acute myocardial infarction (from the Korea Acute Myocardial Infarction Registry).
abstract: BACKGROUND
  We investigated the association between meteorological parameters and hospital admissions for acute myocardial infarction (AMI) in a temperate and continental climate, Korea.
  
  
  METHODS
  From the Korean AMI Registry, 2136 Koreans admitted for AMI in four university hospitals in Daegu city from November 2005 to October 2007 were included in this study. We calculated the incidences of AMI per season, per month, and per day-of-week. The meteorological parameters, including air temperature, relative humidity, wind speed, sunshine duration, and a thermo-hydrological index, were provided by the database of the Korea Meteorological Administration. Generalized additive Poisson models were used.
  
  
  RESULTS
  Seasonal variations were noted for AMI, characterized by winter peak and summer trough (p<0.001). Monthly occurrence rate of AMI was highest in January and lowest in October (p<0.001). There were significant associations between hospital admissions and meteorological parameters including air temperature, relative humidity, and sunshine duration after controlling for effects of day-of-week, season, and holidays (p<0.05). These associations were stronger in females and the younger age (<65 years) (p<0.01).
  
  
  CONCLUSIONS
  The incidence of AMI shows seasonal and monthly variations. Meteorological parameters have a significant influence on the occurrence of AMI, particularly in females and the younger age.
authors.affiliation: Department of Internal Medicine, Kyungpook National University Hospital, Chung-Ku, Daegu, Republic of Korea.
authors.forename: Jang Hoon
authors.initials: JH
authors.lastname: Lee
authors.forename: Shung Chull
authors.initials: SC
authors.lastname: Chae
authors.forename: Dong Heon
authors.initials: DH
authors.lastname: Yang
authors.forename: Hun Sik
authors.initials: HS
authors.lastname: Park
authors.forename: Yongkeun
authors.initials: Y
authors.lastname: Cho
authors.forename: Jae-Eun
authors.initials: JE
authors.lastname: Jun
authors.forename: Wee-Hyun
authors.initials: WH
authors.lastname: Park
authors.forename: Sin
authors.initials: S
authors.lastname: Kam
authors.forename: Won Kee
authors.initials: WK
authors.lastname: Lee
authors.forename: Young Jo
authors.initials: YJ
authors.lastname: Kim
authors.forename: Kee Sik
authors.initials: KS
authors.lastname: Kim
authors.forename: Seung Ho
authors.initials: SH
authors.lastname: Hur
authors.forename: Myung Ho
authors.initials: MH
authors.lastname: Jeong
mesh_terms: D000368:Aged; D005260:Female; D006760:Hospitalization / Q000639:trends*; D006801:Humans; D007723:Korea / Q000453:epidemiology; D008297:Male; D009203:Myocardial Infarction / Q000453:epidemiology* / Q000628:therapy; D012042:Registries; D012307:Risk Factors; D014887:Weather