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A nonparametric spatial scan statistic for continuous data

Authors
 정인경 
Citation
 International Journal of Heath Geographics, Vol.14 : 30, 2015 
Journal Title
 International Journal of Heath Geographics 
ISSN
 1476-072X 
Issue Date
2015
Abstract
BACKGROUND: Spatial scan statistics are widely used for spatial cluster detection, and several parametric models exist. For continuous data, a normal-based scan statistic can be used. However, the performance of the model has not been fully evaluated for non-normal data. METHODS: We propose a nonparametric spatial scan statistic based on the Wilcoxon rank-sum test statistic and compared the performance of the method with parametric models via a simulation study under various scenarios. RESULTS: The nonparametric method outperforms the normal-based scan statistic in terms of power and accuracy in almost all cases under consideration in the simulation study. CONCLUSION: The proposed nonparametric spatial scan statistic is therefore an excellent alternative to the normal model for continuous data and is especially useful for data following skewed or heavy-tailed distributions.
URI
http://ir.ymlib.yonsei.ac.kr/handle/22282913/141651
DOI
10.1186/s12942-015-0024-6
Appears in Collections:
1. 연구논문 > 1. College of Medicine > Dept. of Biostatistics
Yonsei Authors
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