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A spatial scan statistic for multinomial data
Author(s) -
Jung Inkyung,
Kulldorff Martin,
Richard Otukei John
Publication year - 2010
Publication title -
statistics in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.996
H-Index - 183
eISSN - 1097-0258
pISSN - 0277-6715
DOI - 10.1002/sim.3951
Subject(s) - scan statistic , categorical variable , multinomial distribution , poisson distribution , statistic , computer science , statistics , spatial analysis , cluster (spacecraft) , data mining , mathematics , programming language
As a geographical cluster detection analysis tool, the spatial scan statistic has been developed for different types of data such as Bernoulli, Poisson, ordinal, exponential and normal. Another interesting data type is multinomial. For example, one may want to find clusters where the disease‐type distribution is statistically significantly different from the rest of the study region when there are different types of disease. In this paper, we propose a spatial scan statistic for such data, which is useful for geographical cluster detection analysis for categorical data without any intrinsic order information. The proposed method is applied to meningitis data consisting of five different disease categories to identify areas with distinct disease‐type patterns in two counties in the U.K. The performance of the method is evaluated through a simulation study. Copyright © 2010 John Wiley & Sons, Ltd.