The nursing personnel of a day hospital for diabetic patients selected at random two 30 patients groups out of the cohort of those who had followed an educational course in the same day hospital, and out of the cohort of first contacts with the hospital. A formal evaluation has been made on two topics: the correctness of the technical execution of various procedures, the patient's perception of the factors which could play a role in determining the quality of communication between nurses and patients. Patients who were exposed to the original course appear to perform better. Along the same line, patients of the day hospital seem to share a status of conscious acceptance of the disease and of its direct personal implications.