Improving the estimation of multiple correlated dietary effects on colon-rectum cancer in multicentric studies:

GIULIA ROLI & PAOLA MONARI
The paper deals with the analysis of the effects of multiple exposures on the occurrenceof a disease in observational case-control studies. We consider the case of multilevel data, with subjects nested in spatial clusters. As a result, we often face problems of small and sparse data, along with correlations among the exposures and the observations, which both invalidate the results from the ordinary analyses. A hierarchical Bayesian model is here proposed to manage the within-cluster...