Derivation and validation of a novel method to subgroup patients with functional dyspepsia: beyond upper gastrointestinal symptoms

Summary Background Conventionally, patients with functional dyspepsia are subgrouped based on upper gastrointestinal symptoms, according to the Rome criteria. However, psychological co‐morbidity and extraintestinal symptoms are also relevant to functional gastrointestinal disorders. Aim To investigate whether it is possible to subgroup people with functional dyspepsia using factors beyond upper gastrointestinal symptoms. Methods We collected...