The previous papers in this series (Rosenvinge & Pettersen, 2014a,b) outlined a historical panorama and presented knowledge about the distribution of eating disorders in various populations as well as about putative risk factors. This final paper focuses on social epidemiology, notably the current status of treatment dissemination and prevention research. We also discuss some comorbidity findings and transdiagnostic issues as an alternative to the DSM based definition of an epidemiological case, and how such an alternative definition may introduce new perspectives of prevention.
Key words: eating disorders, epidemiology, reviewThe authors declare no conflict of interest in preparing this work 3 The present article is the final one of three about the epidemiology of eating disorders. The first one (Rosenvinge & Pettersen, 2014a) outlined basic epidemiological concepts, approaches and issues. In addition, it outlined a historical panorama of the epidemiology of eating disorders up to the early 1990s depicting, the evolvement of eating disorders from being one, curious and rare disorder (i.e., anorexia nervosa) to a set of disorders distributed in the population to an extent which has caught public concern and scientific effort for the past 30 or 40 years. This evolvement has resulted in case definitions through the DSM and ICD manuals, and being worldwide disseminated they haves had a major impact on case definition-and identification methods in epidemiological eating disorder research.The second paper in this series (Rosenvinge & Pettersen, 2014b) outlined recent knowledge about descriptive epidemiology; how many who actually have a DSM eating disorder or significant eating problems at a given point of time (i.e., the point prevalence), or in the past (i.e., the lifetime prevalence), as well as about the number of new cases appearing per year (i.e., the incidence). In addition, we focused on issues within analytic epidemiology, notably what is known about risk factors for developing eating disorders or for staying ill for a longer period of time.Case identification methods require a case definition which is useful for analytic and social epidemiological purposes, and not just for describing the prevalence or incidence.Traditionally, the DSM taxonomy has provided a gold standard. This may be questioned in view of mental disorders most likely to come along with eating disorders, most likely to affect their course, and where the comorbidity may point to transdiagnostic factors possibly relevant to epidemiological research. The first aim of this paper is to discuss the relevance and implications of such perspectives in constructing an epidemiological case definition.Social epidemiology becomes relevant when we have some answers from descriptive epidemiology to the "how many-questions", and from analytical epidemiology to the "who, and "why"-questions. One part of social epidemiology concerns prevention, and which may take the approach of health promotion at a universal (general population) level, i.e., by...