（三）慢性胃炎与十二指肠炎功能性消化不良患者中大约有30%～50%经组织学检查证实为胃窦胃炎，欧洲不少国家将慢性胃炎视为功能性消化不良，认为慢性胃炎可能通过神经及体液因素影响胃的运动功能，也有作者认为非糜烂性十二指肠炎也属于功能性消化不良。
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