title: Trends in infant mortality rates in Hungary between 1963 and 2012.
abstract: OBJECTIVE
  This study investigated annual and seasonal death trends for infants of <1 year of age in Hungary between 1963 and 2012 and analysed commonly accepted risk factors.
  
  
  METHODS
  Data on the numbers of live births and infant deaths were obtained from the published nationwide population register. Negative binomial regression was applied to investigate the yearly trends in rates and also the effect of possible risk factors - low birthweight, maternal education and sex - on infant mortality. Cyclic trends were investigated using logistic regression.
  
  
  RESULTS
  Annual infant mortality declined significantly (p < 0.001) from 42.9 to 4.9 per 1000 live births per year during the study period and significantly increased (p < 0.001) in the low birthweight group and lower maternal education groups. A significant (p < 0.001) cyclic trend in mortality was revealed, with a peak in deaths in late February for all infants and a double peak, in May and November, in the group of cases who died during the early neonatal period.
  
  
  CONCLUSIONS
  This Hungarian study suggests that there was a significant seasonal effect on neonatal and infant mortality at the end of winter between 1963 and 2012. We speculate that this may have been related to respiratory infections.
authors.affiliation: Faculty of Economics, Agriculture and Health Studies, Saint Stephen University Békéscsaba, Békéscsaba, Hungary.
authors.forename: Csaba
authors.initials: C
authors.lastname: Nyári
authors.forename: Tibor András
authors.initials: TA
authors.lastname: Nyári
authors.forename: Richard J Q
authors.initials: RJ
authors.lastname: McNally
mesh_terms: D005260:Female; D006801:Humans; D006814:Hungary / Q000453:epidemiology; D007223:Infant; D007226:Infant Mortality / Q000639:trends*; D008297:Male; D012307:Risk Factors; D012621:Seasons
keywords: Hungary; Infant mortality; Neonatal mortality; Respiratory infections; Seasonal variations