title: Association between diurnal temperature range and respiratory tract infections.
abstract: OBJECTIVE
  This study aimed to assess the association between emergency-room visits for respiratory tract infection (RTI) with diurnal temperature range (DTR), a weather parameter closely associated with urbanization and global climate change.
  
  
  METHODS
  We conducted a semiparametric time-series analysis to estimate the percentage increase in emergency-room visits for RTI associated with changes in DTR after adjustment for daily weather conditions (temperature and relative humidity) and outdoor air pollution.
  
  
  RESULTS
  DTR was significantly associated with daily emergency-room visits for RTI. An increase of 1 °C in the current-day (L0) and in the 2-day moving average (L01) DTR corresponded to a 0.94% [95% confidence interval (CI), 0.34%-1.55%] and 2.08% (95% CI, 1.24%-2.93%) increase in emergency-room visits for RTI, respectively.
  
  
  CONCLUSIONS
  DTR was associated with increased risk of RTI. More studies are needed to understand the impact of DTR on respiratory health.
authors: School of Public Health, Key Lab of Public Health Safety of the Ministry of Education, Fudan University, Shanghai 200032, China.
authors: Wen Zhen
authors: WZ
authors: Ge
authors: Feng
authors: F
authors: Xu
authors: Zhuo Hui
authors: ZH
authors: Zhao
authors: Jin Zhuo
authors: JZ
authors: Zhao
authors: Hai Dong
authors: HD
authors: Kan
mesh_terms: D002681:China; D004636:Emergency Service, Hospital / Q000706:statistics & numerical data; D006801:Humans; D012141:Respiratory Tract Infections / Q000453:epidemiology*; D013696:Temperature
keywords: Acute respiratory tract infection; Diurnal temperature range; Time-series