Local Moran’s directory (LISA)
From ArcGIS system , LISA was applied so you’re able to evaluate the groups out of RR away from each other colorectal disease frequency and you will colorectal cancer tumors death. The brand new details included in area meaning have been the newest inverse point and you will the Euclidean point. The last charts was basically overlaid, which acceptance us to select the municipalities that belong in addition so you’re able to higher-higher team categories or lowest-lower team groups in the brand new incidence and you will mortality maps.
Geographically adjusted regression (GWR)
We made use of GWR, did for the ArcGIS, in order to analyse the strength of association ranging from colorectal malignant tumors chance and you can colorectal disease death during mainland Portugal. GWR is actually a location regression means and this can be applied a formula to own each geographical tool less than research.
So long as there is no underreport of incidence and death rates, the hypothesis is when the fresh lethality rate of the someone which have colorectal cancer tumors is equal between municipalities we might observe an excellent proportionality amongst the chance price and also the death speed. Meaning that the higher this new incidence rate, the higher new death rates might possibly be. A lack of match of your own design in certain section perform indicate a good deviance from this hypothesis and therefore there’s absolutely no proportionality between incidence and you may mortality rate.