Displaying results 1 - 6 of 6
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Geographically Meaningful Cluster Scanning Through Weak Link Correction
Content Type: Abstract
Many heuristics were developed recently to find arbitrarily shaped clusters (see review [1]). The most popular statistic is the spatial scan [2]. Nevertheless, even if all cluster solutions could be known, the problem of… read more… statistic is the spatial scan [2]. Nevertheless, even if all cluster solutions could be known, the problem … solution presented is a Pareto-set, consisting of all the clusters found which are not simultaneously worse in … The significance evaluation is conducted in parallel for all the clusters in the Pareto-set through a … -
A Zero-Inflated Poisson Based Spatial Scan Statistic
Content Type: Abstract
The spatial scan statistic proposed by Kulldorff has been widely used in spatial disease surveillance and other spatial cluster detection applications. In one of its versions, such scan statistic was developed for inhomogeneous Poisson process… read more… Cibele da-Silva and Michel da Silva Universidade de Brasilia, Brasilia, Distrito Federal, Brazil Objective … M. A spatial scan statistic. Commun Stat Theor Meth. 1997;26:1481�96. 3. Lambert D. Zero-inflated poisson regression, … permitting all non-commercial use, distribution, and reproduction in … -
Optimizing Simultaneously the Geometry and the Internal Cohesion of Clusters
Content Type: Abstract
Irregularly shaped cluster finders frequently end up with a solution consisting of a large zone z spreading through the map, which is merely a collection of the highest valued regions, but not a geographically sound cluster. One way… read more… J. Ferreira, André L.F. Cançado Universidade Federal de Minas Gerais OBJECTIVE We introduce a novel spatial scan … The solution presented is a Pareto-set, consisting of all the clusters found which are not si- multaneously worse … A Spatial Scan Statistic, Comm. Statist. Theory Meth., 26(6), 1481-1496. Corresponding author: duczmal@ufmg.br … -
Weighted non-connectivity for detection of irregular clusters
Content Type: Abstract
Heuristics to detect irregularly shaped spatial clusters were reviewed recently. The spatial scan statistic is a widely used measure of the strength of clusters. However, other measures may also be useful, such as the geometric compactness… read more… algorithm. The solution is a Pareto set, consisting of all clusters that are not worse on both objectives simulta- … The statistical significance evaluation is performed for all clusters in the Pareto set through Monte Carlo … A spatial scan statistic. Comm Statist Theory Meth 1997;26:1481–96. 3 Duczmal L, Canc-ado ALF, Takahashi RHC. … -
What Is the True Shape of a Disease Cluster? The Multi-Objective Genetic Scan
Content Type: Abstract
Irregularly shaped spatial disease clusters occur commonly in epidemiological studies, but their geographic delineation is poorly defined. Most current spatial scan software usually displays only one of the many possible cluster solutions with… read more… F. Cançado , Ricardo H. C. Takahashi Universidade Federal de Minas Gerais, Brazil OBJECTIVE We propose a novel … most ir- regularly shaped one, corresponding to varying de- grees of penalization parameters imposed to the free- … scan statistic value (LLR). The Pareto set consists of all clusters candidates z such that no other cluster has … -
Non-parametric intensity bounds for the visualization of disease clusters
Content Type: Abstract
Consider the most likely disease cluster produced by any given method, like SaTScan, for the detection and inference of spatial clusters in a map divided into areas; if this cluster is found to be statistically significant, what could be… read more… to exclude them from a health program of prevention? Do all the areas inside the cluster have the same importance … to exclude them from a health program of prevention? Do all the areas inside the cluster have the same importance … Conley J. Interactive detection of spatial clusters. Adv Dis Surveillance 2008;5:37. 4 Boscoe FP, McLaughlin C, …