Assuming the same participation rate at TC as at FS, 48 TCs would be necessary to detect 1 additional adanced neoplasm missed by FS.

• 假设结肠镜检和乙状结肠镜检有相同的分享率，为检测额外的乙状结肠镜检遗漏的1例恶性肿瘤，48次结肠镜检需要被进行。