PMID: 2484486Nov 1, 1989Paper

Application of multivariate statistical methods to the descriptive epidemiology of malignant tumors

Annali di igiene : medicina preventiva e di comunità
F La RosaP Tozzi

Abstract

A study utilizing cluster analysis was undertaken to evaluate the association between standardized cancer mortality rates in different Italian provinces during the period 1975-77. The cancer sites examined were: stomach, lung, colon-rectum, liver and biliary ducts, pancreas, urinary bladder, oral cavity and pharynx, oesophagus. In addition larynx and prostate were examined in males while and uterus were considered in females. The cluster analysis was carried out using the "Euclidean distance" as dissimilarity index and the UPGMA (Unweighted pair group method using arithmetic average) as a clustering method, and considering as OTUs (Operational Taxonomic Units) both cancer sites and Italian provinces. Cluster analysis applied to cancer sites showed a strong relationship, in both sexes, between the alcohol-tobacco-related neoplasms. The same association was found by other Authors in several countries of the world. A similar analysis, carried out in USA during the period 1950-67 and consistent with our results, inserted lung cancer in the same cluster. In the present study this site demonstrated different characteristics in the two sexes: in females, together with the pancreas, is clustered, at higher dissimilarity level, with ora...Continue Reading

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