To determine whether seasonality of the sudden infant death syndrome persists now that rates have fallen, mostly after widespread adoption of the « face upwards » sleeping position.
Design-Monthly data on the sudden infant death syndrome during 1987-9 were compared for seasonality with those of 1991-3 ; rates were studied as deaths per 1000 live births.
Setting-Australia and Britain (England, Wales, and Scotland).
Subjects-Infants under 1 year dying of the syndrome (2401 for Australia and 6630 for Britain).
Main outcome measure-Extent of seasonal variation (amplitude) was established by cosinor analysis ; amplitudes for the earlier and later years were compared.
The rate fell in every month, and, though it did so relatively more in winter than summer, seasonality remained a distinctive feature.
In the comparison of amplitudes the ratio between the earlier and later years was 1.4 in both Australia and Britain.
Some differences between the hemispheres were noted.
Conclusions-Seasonality of the sudden infant death syndrome remains to be explained and continues to be an important aetiological lead.
Studies from other countries are needed.
Mots-clés Pascal : Mort subite, Epidémiologie, Apnée sommeil syndrome, Australie, Océanie, Nourrisson, Homme, Grande Bretagne, Royaume Uni, Europe, Saison
Mots-clés Pascal anglais : Sudden death, Epidemiology, Sleep apnea syndrome, Australia, Oceania, Infant, Human, Great Britain, United Kingdom, Europe, Season
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 96-0315432
Code Inist : 002B27B11. Création : 10/04/1997.