 8. Co-habitation status: 1 item On the basis of MPI values, it is possible to calculate the short- and long-term mortality risk of the older subjects and to define the severity grade of mortality risk: low, moderate and severe. Several studies showed that the prognostic accuracy of the aggregated MPI was significantly greater than the prognostic accuracy of its individual components considered singularly. Thus the multidimensional approach can be successfully used in elderly patients for both clinical and administrative purposes. 