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Prospective space–time surveillance with cumulative surfaces for geographical identification of the emerging cluster

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Abstract

We developed a space–time prospective surveillance method when the data are point events, monitoring if there is an emerging cluster. Typical application areas are crime or disease surveillance. At each new event, a local Knox score is calculated and spatially spread to form a stochastic surface. The surfaces are accumulated sequentially until they exceed a specified threshold, causing an alarm to go off and identify the region of the probable cluster. The method requires little prior knowledge from the user and provides a way to identify locations and time of possible clusters, through the visualization of the cumulative surface. We present a simulation study for different cluster scenarios, as well as an application to a dataset of meningitis cases in Belo Horizonte, Brazil.

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Correspondence to Thais Paiva.

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Paiva, T., Assunção, R. & Simões, T. Prospective space–time surveillance with cumulative surfaces for geographical identification of the emerging cluster. Comput Stat 30, 419–440 (2015). https://doi.org/10.1007/s00180-014-0541-y

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  • DOI: https://doi.org/10.1007/s00180-014-0541-y

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