Delivering spatially comparable inference on the risks of multiple severities of respiratory disease from spatially misaligned disease count data

Duncan Lee and Craig Anderson

Biometrics, 2023, vol. 79, issue 3, 2691-2704

Abstract: Population‐level disease risk varies between communities, and public health professionals are interested in mapping this spatial variation to monitor the locations of high‐risk areas and the magnitudes of health inequalities. Almost all of these risk maps relate to a single severity of disease outcome, such as hospitalization, which thus ignores any cases of disease of a different severity, such as a mild case treated in a primary care setting. These spatially‐varying risk maps are estimated from spatially aggregated disease count data, but the set of areal units to which these disease counts relate often varies by severity. Thus, the statistical challenge is to provide spatially comparable inference from multiple sets of spatially misaligned disease count data, and an additional complexity is that the spatial extents of the areal units for some severities are partially unknown. This paper thus proposes a novel spatial realignment approach for multivariate misaligned count data, and applies it to the first study delivering spatially comparable inference for multiple severities of the same disease. Inference is via a novel spatially smoothed data augmented MCMC algorithm, and the methods are motivated by a new study of respiratory disease risk in Scotland in 2017.

Date: 2023
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