尽管只有2.7%的病人等待这么长时间，这些病人中有8.6%是等待结肠镜检查，8%是等待乙状结肠镜检查以及其他癌症诊断检查。
While only 2.7% of patients wait this long, the figure is 8.6% for those awaiting a colonoscopy and 8% for flexible sigmoidoscopy, another test for cancer.
乙状结肠镜检可能可以检测出27.3%由结肠镜检发现的基底部恶性肿瘤。
FS would have detected 27.3% of the proximal advanced neoplasms detected at TC.
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。
Assuming the same participation rate at TC as at FS, 48 TCs would be necessary to detect 1 additional advanced neoplasm missed by FS.
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