This paper was commissioned by the committee on the Effectiveness of Early Education in Autism of the National Research Council (NRC). It provides a review of epidemiological studies of pervasive developmental disorders (PDD) which updates a previously published article (The epidemiology of autism: a review. Psychological Medicine 1999; 29: 769-786). The design, sample characteristics of 32 sur...

a clinical and epidemiological comparison of the cutaneous leishmaniasis was carried out among 100 victims of cutaneous leishmaniasis who were living in the villages of isfahan area, and 100 other patients of the lesions have been determined and analyzed. comparison of patients of the city with that of neighboring villages shows that both type of cutaneous leishmaniasis are prevalent in isfahan...

This review provides an overview of the types of information epidemiological research can provide and how these data can be used. The aim is to provide the readers with basic epidemiological skills to allow them to read critically scientific articles and to gain proficiency in communicating about epidemiological research. All examples in the review are drawn from the ophthalmic literature. The ...