Acute abdominal diseases which mimicked appendicitis included acute gastroenteritis, nonspecific abdominal pain, urinary tract infection, and upper respiratory infection with gastrointestinal upset.

• 临床症状相似于阑尾炎且无法被区辨分析预测的急性腹症经分析后，包括以下四者：急性肠胃炎、非专一性腹痛、尿道感染、上呼吸道感染合并肠胃症状。