title: Estimating trends and seasonality in coronary heart disease.
abstract: We present two methods of estimating the trend, seasonality and noise in time series of coronary heart disease events. In contrast to previous work we use a non-linear trend, allow multiple seasonal components, and carefully examine the residuals from the fitted model. We show the importance of estimating these three aspects of the observed data to aid insight of the underlying process, although our major focus is on the seasonal components. For one method we allow the seasonal effects to vary over time and show how this helps the understanding of the association between coronary heart disease and varying temperature patterns.
authors.affiliation: School of Population Health, University of Queensland, Herston, QLD 4006, Australia. a.barnett@sph.uq.edu.au
authors.forename: A G
authors.initials: AG
authors.lastname: Barnett
authors.forename: A J
authors.initials: AJ
authors.lastname: Dobson
mesh_terms: D000328:Adult; D006801:Humans; D008297:Male; D008875:Middle Aged; D008954:Models, Biological; D015233:Models, Statistical; D015337:Multicenter Studies as Topic; D009203:Myocardial Infarction / Q000453:epidemiology*; D012621:Seasons