While widely used in research, the 1991 Rome criteria for the gastroduodenal disorders, especially symptom subgroups in dyspepsia, remain contentious. After a comprehensive literature search, a consensus-based approach was applied, supplemented by input from international experts who reviewed the report. Three functional gastroduodenal disorders are defined. Functional dyspepsia is persistent or recurrent pain or discomfort centered in the upper abdomen; evidence of organic disease likely to explain the symptoms is absent, including at upper endoscopy. Discomfort refers to a subjective, negative feeling that may be characterized by or associated with a number of non-painful symptoms including upper abdominal fullness, early satiety, bloating, or nausea. A dyspepsia subgroup classification is proposed for research purposes, based on the predominant (most bothersome) symptom: (a) ulcer-like dyspepsia when pain (from mild to severe) is the predominant symptom, and (b) dysmotility-like dyspepsia when discomfort (not pain) is the predominant symptom. This classification is supported by recent evidence suggesting that predominant symptoms, but not symptom clusters, identify subgroups with distinct underlying pathophysiological disturbances and responses to treatment. Aerophagia is an unusual complaint characterized by air swallowing that is objectively observed and troublesome repetitive belching. Functional vomiting refers to frequent episodes of recurrent vomiting that is not self-induced nor medication induced, and occurs in the absence of eating disorders, major psychiatric diseases, abnormalities in the gut or central nervous system, or metabolic diseases that can explain the symptom. The current classification requires careful validation but the criteria should be of value in future research. (Gut 1999;45(Suppl II):II37-II42)

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Psychological disorders are highly prevalent in patients with inflammatory bowel disease (IBD). Anxiety and depression are known to independently affect quality of life and may additionally impair quality of life in IBD over and above the IBD itself. Some researchers have further proposed that anxiety and depression may influence the clinical course of IBD. However, despite the potential for anxiety and depression to play an important role in the clinical picture of IBD, there is little prospective well-controlled research in this area. Probably because of this lack of clear data, researchers dispute the actual role of these psychological disorders in IBD, with a number of conflicting opinions expressed. This article reports on a review of the literature in this field. Herein we discuss the five main areas of controversy regarding IBD and the specific psychological comorbidities of depression and anxiety: 1) the relative rate of cooccurrence of these psychological disorders with IBD; 2) the cooccurrence of these psychological disorders with particular phase of IBD; 3) the cooccurrence of these psychological disorders with the specific type of IBD; 4) the rate of these psychological comorbidities compared both to healthy subjects and to other disease states; and 5) the timing of onset of psychological comorbidity with respect to onset of IBD. Methodological weaknesses of the reviewed studies make it impossible to resolve these controversies. However, the results clearly show that anxiety/depression and IBD frequently interact. Given the long-term illness burden patients with IBD face, further prospective, appropriately controlled studies are needed to adequately answer the question of the precise interplay between anxiety/depression and IBD.