[Psychiatric epidemiology: demographic study and characterization and prevalence rate of mental diseases]. / Epidémiologie psychiatrique: étude démographique et caractérisation d'un taux de prévalence des maladies mentales.

The authors report an experience on the assessment of mental illness prevalence rate in the socio-professional population of four French provinces. This analysis, preceded by a demographic study of the considered population, will be extended by an incidence of mental disorders research relative to constitute a cohort of patients which 3 years follow-up study will allowed to make a cost analysis (cost-effectiveness) of the chosen therapeutic ways and means.

[Instrumental analysis of day hospitals]. / Une analyse instrumentale des hôpitaux de jour.

The authors, taking the opportunity of an epidemiological study, submit the results of 12 day hospitals functioning, having a similar administrative structure, receiving an homogeneous train of clients but distributed on different points of the national territory and having a different functional organization. They draw conclusions from it, on the day hospital definition, the interest of defining scientific evaluation systems, for a better assessment of the therapeutic functioning, the place and importance of this type of medical service for the evolution of actions in the field of mental health.