Searching for space-time clusters: The CutL method compared to Kulldorff’s scan statistic

  • Barbara Więckowska | basia@ump.edu.pl Department of Computer Science and Statistics, Poznan University of Medical Sciences, Poznan, Poland.
  • Ilona Górna Department of Bromatology, Poznan University of Medical Sciences, Poznan, Poland.
  • Maciej Trojanowski Greater Poland Cancer Centre, Greater Poland Cancer Registry, Poznan, Poland.
  • Agata Pruciak Department of Computer Science and Statistics, Poznan University of Medical Sciences, Poznan, Poland.
  • Barbara Stawińska-Witoszyńska Department of Epidemiology and Hygiene, Poznan University of Medical Sciences, Poznan, Poland.

Abstract

Both epidemiology and health care planning require analytical tools, especially for cluster detection in cases with unusually high rates of disease incidence. The aim of this work was to extend the application of the CutL method, which is used for detecting spatial clusters of any shape, to detecting space-time clusters, and to show how the method works compared to Kulldorff’s scan statistic. In the CutL method, clusters with disease incidence rates higher than the one entered by the researcher are searched for. The way in which the space-time version of that method works is illustrated with the example of data simulating the distribution of people affected by health problems in Polish counties in the period 2013- 2017. With respect to detection of irregularly shaped space-time clusters, the CutL method turned out to be more effective than Kulldorff’s scan statistic; for cylinder-shaped space-time clusters, the two methods produced similar results. The CutL method has also the important advantage of being widely accessible through the PQScut and PQStat programmes (PQStat Software Company, Poznan, Poland).

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Published
2019-11-06
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Section
Original Articles
Keywords:
Space-time statistics, Cluster detection, Spatial epidemiology, Poland, Kulldorf, CutL
Statistics
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How to Cite
Więckowska, B., Górna, I., Trojanowski, M., Pruciak, A., & Stawińska-Witoszyńska, B. (2019). Searching for space-time clusters: The CutL method compared to Kulldorff’s scan statistic. Geospatial Health, 14(2). https://doi.org/10.4081/gh.2019.791