title: Exposure to hot and cold temperatures and ambulance attendances in Brisbane, Australia: a time-series study.
abstract: OBJECTIVE
  To investigate the effect of hot and cold temperatures on ambulance attendances.
  
  
  METHODS
  An ecological time-series study.
  
  
  METHODS
  The study was conducted in Brisbane, Australia. The authors collected information on 783 935 daily ambulance attendances, along with data of associated meteorological variables and air pollutants, for the period of 2000-2007.
  
  
  METHODS
  The total number of ambulance attendances was examined, along with those related to cardiovascular, respiratory and other non-traumatic conditions. Generalised additive models were used to assess the relationship between daily mean temperature and the number of ambulance attendances.
  
  
  RESULTS
  There were statistically significant relationships between mean temperature and ambulance attendances for all categories. Acute heat effects were found with a 1.17% (95% CI 0.86% to 1.48%) increase in total attendances for 1°C increase above threshold (0-1 days lag). Cold effects were delayed and longer lasting with a 1.30% (0.87% to 1.73%) increase in total attendances for a 1°C decrease below the threshold (2-15 days lag). Harvesting was observed following initial acute periods of heat effects but not for cold effects.
  
  
  CONCLUSIONS
  This study shows that both hot and cold temperatures led to increases in ambulance attendances for different medical conditions. Our findings support the notion that ambulance attendance records are a valid and timely source of data for use in the development of local weather/health early warning systems.
authors: School of Public Health and Social Work, Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Australia.
authors: Lyle R
authors: LR
authors: Turner
authors: Des
authors: D
authors: Connell
authors: Shilu
authors: S
authors: Tong