该数字非常令人气馁，不幸的很，他们证实了先前研究提示的人们没有获得足够的结直肠癌筛查。
These numbers are very discouraging and, unfortunately they confirm previous studies that show not enough people are getting screened for colorectal cancer.
近期发表的2个研究证实了一个令人担忧的现状：大部分应该行结直肠癌筛查的美国人并没有作筛查。
Two recently released studies confirm an alarming reality, that a majority of Americans who should be getting screened for colorectal cancer are not.
ASGE筛查指南推荐，刚年满50岁、有发生结直肠癌一般风险的无症状性男性和女性，应该开始结直肠癌筛查。
ASGE screening guidelines recommend that, beginning at age 50, asymptomatic men and women at average risk for developing colorectal cancer should begin colorectal cancer screening.
结直肠癌的死亡率已经在下降，部分因为早期筛查，觉察症状，切除息肉和因研究进步而改良了治疗方法。
The mortality rates have been declining, this in part due to earlier screenings, awareness of symptoms, removing polyps and improved treatments through advances in research discoveries.
例如有结直肠癌家族史等高危人群，应该更早地开始筛查。
People with risk factors, such as a family history of colorectal cancer, should begin at an earlier age.
背景：以愈创木脂为试剂的粪便潜血实验（FOBTs）用于结直肠癌的筛查中，不仅对人血红蛋白特异性不高而且敏感性也很低。
BACKGROUND: Guaiac-based fecal occult blood tests (FOBTs) for colorectal cancer screening are not specific for human hemoglobin and have low sensitivity.
例如从1975年到2000年，结直肠癌发病率下降了22%，一半是因为改变了危险因素像吸烟，一半是因为早期筛查，研究人员说。
For instance, from 1975 to 2000, colorectal cancer incidence fell 22 percent, half due to changes in risk factors such as smoking, and half due to screening, the researchers said.
这些结果表明，防止一例结直肠癌需要筛查的人数为191名，防止一例结直肠癌相关性死亡需要筛查的人数是489名。
These results suggest that the number of individuals requiring screening to prevent one CRC is 191 and to prevent CRC-related death the number is 489.
这些结果表明，防止一例结直肠癌需要筛查的人数为191名，防止一例结直肠癌相关性死亡需要筛查的人数是489名。
These results suggest that the number of individuals requiring screening to prevent one CRC is 191 and to prevent CRC-related death the number is 489.
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