Mortality as a function of temperature. A study in Valencia, Spain, 1991-1993.
Increased mortality is associated with both very low and very high ambient temperatures.
This study assesses the relationship between daily numbers of deaths and variations in ambient temperature within the city of Valencia.
The daily number of deaths from all causes (total deaths and only those occurring in people aged over 70), as well as those deaths from specific causes (e.g. cardiovascular and respiratory diseases, malignant tumours and all causes except external ones) occurring within the city of Valencia were related to the average daily temperature using autoregressive Poisson regression controlling for seasonality, day of the week, holidays, air pollution, influenza incidence, and humidity.
Temperature was measured within the regression model as two complementary variables : Heat'and'Cold'also taken into account were their delayed effects up to 2 weeks after measurement.
Graphical analysis revealed a relationship between temperature and mortality according to the time of year.
For the cooler months (November-April), the temperature at which mortality was lowest was the'minimum' (i.e. around 15°C), while for the warmer months (May-October), it occurred at around 24°C. Because of this, a stratified analysis was undertaken with different values for the'Heat'and'Cold'variables according to which of the two seasons was involved. (...)
Mots-clés Pascal : Mortalité, Température ambiante, Variation thermique, Epidémiologie, Facteur risque, Homme, Espagne, Europe
Mots-clés Pascal anglais : Mortality, Room temperature, Thermal variation, Epidemiology, Risk factor, Human, Spain, Europe
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 97-0350706
Code Inist : 002B30A01A2. Création : 12/09/1997.