The positive rate of DDIA was 15 8%. The positive rate in 18 stool positive subjects was 94 4% with Youden In dex 0 81. The positive rate of DGS COPT was 8 9% .

• DDIA阳性 73人 ；阳性率为 15 .；8%25；18例粪检阳性者中 17例阳性；阳性符合率为 94