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Updated: Aug 23, 2026

A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data
Published on: December 9, 2015
Adjusting SIDS rates by seasonality in births in Minnesota
1Division of Biostatistics, School of Public Health, University of Minnesota, A460 Mayo MMC 303, 420 Delaware Street S.E., Minneapolis 55455, USA. melanie@biostat.umn.edu
Abstract:
This paper is concerned with the formation of sudden infant death syndrome (SIDS) rates over time. Because of differential numbers of births throughout the year, a new SIDS rate is developed that takes into account the changing number of infants at risk and in particular the changing age distribution throughout the year. Differences between this newly adjusted rate and the commonly used unadjusted rates will be presented. Data from Minnesota linked birth--death records from 1990--1998 will be used for analysis.
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