PubMed · 1390054
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1992-10-16. Immunization coverage survey.. https://pubmed.ncbi.nlm.nih.gov/1390054/
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According to several reports sudden infant death rates have decreased significantly after public campaigns aimed at reducing the incidence of sleeping in a prone position. The Styrian population (1.2 million inhabitants), who have been studied from 1984, also showed a significant drop in the incidence of cot death during 1989 (from 2/1000 to 1/1000%). The year before, a campaign for the prevention of cot death had been launched. This included the recommendation to prevent infants from lying in a prone position during sleep. Part of the prevention programme consisted of a detailed questionnaire filled in and returned by the parents. These data, on 29970 infants from 1989 to 1994, provided information on the frequency of prone sleeping in 37% of our total population and as a consequence on parental response to the campaign. Calculating the data per year led to the surprising result that the reduction by half (from 50% to 25%) in the prevalence of sleeping in a prone position did not occur in 1989, when the drop in the incidence of cot death occurred, but 3 years later, in 1992. The following years saw a further decrease of prone position to 7% but no appreciable change in the incidence of cot death. However, during those 11 years of study about 80% of the victims were consistently found dead lying in a prone position. Our results show a temporal disparity between the reduction of sudden infant death and the decrease of prone sleeping in a population. Although we do not deny sleeping in a prone position as a risk factor for cot death, there cannot be a simple relationship between sleeping habits in the population and incidence of cot death.
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