Abstract
In the past decade much has been learned about the clinical features, diagnosis and understanding of people with anorexia nervosa and bulimia nervosa. In order to provide the next level of improvement in our care for these patients, our understanding of certain problems must be addressed by empirical research. Areas which require further study include the definition of high risk groups, the refinement of diagnoses, understanding factors which result in chronicity, determining the complications of chronicity and comparative evaluations of different treatments. These five areas are outlined in this article. Populations at risk for anorexia nervosa and bulimia nervosa may be those who must be thin and achieve according to career choice, those with a particular family and personal psychiatric history; obesity and chronic medical illnesses may be further risks. Improved diagnostic understanding has occurred by the differentiation of bulimic from restricting subtypes of anorexia nervosa. Further work must determine the relationship between the bulimic subtype of anorexia nervosa and bulimia in normal weight women and to further clarify the relationship between eating disorders and affective disorders. A number of factors may result in a chronic illness. These have been described on a variety of levels. The consequences of starvation in altering an individual's thinking, feeling and behaviour do play a role. It is not clear what factors at a neurochemical level contribute to this. Elevated endogenous opiates decreased noradrenergic function and decreased serotonin may be important.
Information about the chronic complications is required for clinicians to understand the broad range of difficulties that may develop over time so that clinicians may use this information in planning treatment strategies. Two examples, those of osteoporosis and the pregnant woman with an eating disorder, highlight this problem. Finally, treatment is briefly reviewed in terms of options available and the idea of developing a stepped-care approach to treatment.