Abdominal bloating or distension (AB/D) is a common complaint in the outpatient of gastroenterology department. Since the potential contributors are numerous and complex, a longitudinal study on the disease spectrum and natural history of patients was performed to better understand the key factors of AB/D.

中文翻译：

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腹胀或腹胀患者的疾病谱和自然史：一项纵向研究。

腹胀或腹胀（AB/D）是胃肠科门诊的常见主诉。由于潜在的影响因素众多且复杂，因此对患者的疾病谱和自然史进行了纵向研究，以更好地了解 AB/D 的关键因素。