Seasonal variations in the occurrence of acute myocardial infarction in Hungary between 2000 and 2004

Abstract Background The purpose of this study was to determine whether a weekly or seasonal variation could be observed in the onset of acute myocardial infarction (AMI). Methods A retrospective analysis of patients diagnosed with AMI between 2000 and 2004 in Hungary ( n = 81,215 patients) was carri...

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Bibliographic Details
Published in:International journal of cardiology 2008-09, Vol.129 (2), p.251-254
Main Authors: Kriszbacher, Ildikó, Boncz, Imre, Koppán, Miklós, Bódis, József
Format: Article
Language:English
Subjects:
Adolescent
Adult
Aged
Analysis of Variance
Biological and medical sciences
Cardiology. Vascular system
Cardiovascular
Child
Child, Preschool
Circadian Rhythm
Coronary heart disease
Female
Heart
Heart attack
Humans
Hungary - epidemiology
Infant
Infant, Newborn
Life Style
Male
Medical sciences
Middle Aged
Myocardial Infarction - epidemiology
Myocardial Infarction - physiopathology
Myocarditis. Cardiomyopathies
Retrospective Studies
Risk Factors
Seasonal variation
Seasons
Time Factors
Weekly variation
Young Adult
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Summary:Abstract Background The purpose of this study was to determine whether a weekly or seasonal variation could be observed in the onset of acute myocardial infarction (AMI). Methods A retrospective analysis of patients diagnosed with AMI between 2000 and 2004 in Hungary ( n = 81,215 patients) was carried out. Data were collected by the National Health Insurance Fund Administration (OEP). We calculated the number of AMI cases (incidence) per year, month, and per day in the course of a week with 95% confidence interval. Statistical analysis using one-way analysis of variance (ANOVA) was performed. Results A peak period of the occurrence of AMI was found during spring, while minimum number of events were recorded during summer. Significant difference was observed between the number of events each season ( F = 34.741; p < 0.001). Between 2000 and 2004 the monthly occurrence of AMI was highest in March, May and October ( F = 11.658; p < 0.001). The weekly peak period of AMI morbidity was found on the first day of the week, showing a gradually decreasing tendency all week-through, reaching its minimum incidence on Sunday ( F = 4.162; p < 0.001). Conclusions Results of our study reveal that the incidence of AMI shows a characteristic rhythm with respect to seasons and the days of the week, which should be considered in the development of preventive concepts.
ISSN:0167-5273
1874-1754
DOI:10.1016/j.ijcard.2007.07.095