The positive incidence of CBD stones was 7.8%(80/1030),the false positive incidence was 0%(0/80),and the false negative incidence was 0.8%(8/950) in the control group.

• 对照组胆总管结石阳性率为7.；8%25(80/1 030)；假阳性率为0%25(0/80)；假阴性率为0