Hierarchical Clustering with Spatial Constraints and Standardized Incidence Ratio in Tuberculosis Data
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Ward-like algorithmSpatial constraintsMeasure of riskTuberculosisState of Paraíba, Brazil
Camêlo Aguiar, D., Gutiérrez Sánchez, R., & Silva Camêlo, E. L. (2020). Hierarchical Clustering with Spatial Constraints and Standardized Incidence Ratio in Tuberculosis Data. Mathematics, 8(9), 1478. [doi:10.3390/math8091478]
In this paper, we propose presenting a solution based on socio-epidemiological variables of tuberculosis, considering a clustering with spatial/geographical constraints; and, determine a value of alpha that increases spatial contiguity without significantly deteriorating the quality of the solution based on the variables of interest, i.e. those of the feature space. For the application of Ward’s hierarchical clustering method, two dissimilarity matrices were calculated, the first provides the dissimilarities in the feature space calculated from the socio-epidemiological variables D0 and the second provides the dissimilarities in the calculated constraints space from the geographical distances D1, together with an a mixing parameter and the non-uniform weight w assigned to the calculation of the dissimilarity matrix defined by the standardized incidence ratio (SIR) of TB and that contributed significantly to the increase in clarity, both from a spatial and socio-epidemiological point of view. The method is shown to be feasible in epidemiological studies in the joint understanding of factors of different dimensions, aggregated from a spatial perspective. It is analysis tool that allows making a better understanding of the socio-epidemiological reality of the municipality.