Spatial scan statistics using elliptic windows

Lasse Engbo Christiansen, Jens Strodl Andersen, Henrik Caspar Wegener, Henrik Madsen

Research output: Contribution to conferenceConference abstract for conferenceResearch


The spatial scan statistic is widely used to search for clusters in epidemiologic data. This paper shows that the usually applied elimination of secondary clusters as implemented in SatScan is sensitive to smooth changes in the shape of the clusters. We present an algorithm for generation of set of confocal elliptic windows and propose a new way to present the information when a spatial point process is considered. This method gives smooth changes for smooth expansions of the set of clusters. A simulation study is used to show how the elliptic windows outperforms the usual circular windows. The proposed method for graphical representation of the information in a set of clusters contain more information than just presenting non-overlapping clusters. The authors suggest that more than one graphical representation of a set of clusters should be used to easily extract more information and to avoid pitfalls of the selected method.
Original languageEnglish
Publication date2007
Publication statusPublished - 2007
Event1st Nordic-Baltic Biometric Conference 2007 - Foulum, Denmark
Duration: 6 Jun 20078 Jun 2007


Conference1st Nordic-Baltic Biometric Conference 2007


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