Author(s): Ozonoff A, Jeffery C, Manjourides J, White LF, Pagano M
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Abstract BACKGROUND: Aggregation of spatial data is intended to protect privacy, but some effects of aggregation on spatial methods have not yet been quantified. METHODS: We generated 3,000 spatial data sets and evaluated power of detection at 12 different levels of aggregation using the spatial scan statistic implemented in SaTScan v6.0. RESULTS: Power to detect clusters decreased from nearly 100\% when using exact locations to roughly 40\% at the coarsest level of spatial resolution. CONCLUSION: Aggregation has the potential for obfuscation.
This article was published in Int J Health Geogr
and referenced in Journal of Biometrics & Biostatistics