Giorgio Vittadini

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Cluster Weighted Modeling (CWM) is a mixture approach regarding the mod-elisation of the joint probability of data coming from a heterogeneous population. Under Gaussian assumptions, we investigate statistical properties of CWM from both the theoretical and numerical point of view; in particular, we show that CWM includes as special cases mixtures of(More)
Cluster-weighted modeling (CWM) is a mixture approach to modeling the joint probability of data coming from a heterogeneous population. Under Gaussian assumptions, we investigate statistical properties of CWM from both theoretical and numerical points of view; in particular, we show that Gaussian CWM includes mixtures of distributions and mixtures of(More)
At present, a radical shift in cancer treatment is occurring in terms of predictive, preventive, and personalized medicine (PPPM). Individual patients will participate in more aspects of their healthcare. During the development of PPPM, many rapid, specific, and sensitive new methods for earlier detection of cancer will result in more efficient management(More)
The aim of this paper is to evaluate the effectiveness of community Mental Health Departments in Lombardy (Italy), and analyse the eventual differences in outcome produced by different packages of care. The survey was conducted in 2000 on 4,712 patients treated in ten Mental Health Departments. Patients were assessed at least twice in a year with HoNOS(More)
When data sets are multilevel (group nesting or repeated measures), different sources of variations must be identified. In the framework of unsupervised analyses, multilevel simultaneous component analysis (MSCA) has recently been proposed as the most satisfactory option for analyzing multilevel data. MSCA estimates submodels for the different levels in(More)
An extension of the latent Markov Rasch model is described for the analysis of binary longitudinal data with covariates when subjects are collected in clusters, e.g. students clustered in classes. For each subject, the latent process is used to represent the characteristic of interest (e.g. ability) conditional on the effect of the cluster to which he/she(More)
In view of the increasing interest in electromagnetic fields, the effects on behaviour were studied in a group of foundry workers following prolonged exposure to radiofrequencies. The results of behavioural tests revealed significant differences between the exposed and control groups as regards neuropsychological performance. Anxiety and depression tests,(More)
Over years, there has been an increase in the prescription of psychotropic drugs (PDs), particularly antidepressants (ADs). The aim of the study was to evaluate the consumption of PDs in adult employees in a productive area of Italy and the possible changes induced by the "economic crisis". The study is a retrospective survey in all adult employees in(More)