The findings in asymptomatic control group included 2 cases of ileal polyp (2.50%), 2 cases of angiodysplasia (2.50%), 1 case of intestinal erosion (1.25%), and 1 case of jejunal ulcer (1.25%).

无消化道症检者中发现：回息2例(2.50%)，血管畸形2例(2.50%)，膜糜烂1例(1.25%)，空孤立性溃疡1例(1.25%)。