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Immunoassay-based screening for colorectal cancer

机译:基于免疫分析的结肠直肠癌筛查

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In adults with no specific risk factors, colorectal cancer screening based on detection of occult blood in stools with a guaiac test (Haemoc-cult°) has several technical limitations. Sensitivity is low, only about 50% for colorectal cancer. Immunochemical tests for faecal occult blood are now also available. Do they improve the performance of colorectal cancer screening? To answer this question, we reviewed the available literature using the standard Prescrire methodology. These immunochemical tests are specific for human haemoglobin, are read automatically, and provide quantitative results. Their sensitivity in detecting lesions, and the proportion of patients who subsequently require colonoscopy, depends on the chosen cutoff. In 9 screening studies including a total of about 86 000 participants, immunochemical tests had a sensitivity of between 61% and 89% for colorectal cancer, depending on the test modalities and positivity cutoffs.
机译:在没有特定危险因素的成年人中,基于通过愈创木脂测试(Haemoc-cult°)检测粪便中潜血的大肠癌筛查有几个技术限制。敏感性低,对于结直肠癌仅约50%。现在也可以进行粪便潜血的免疫化学测试。它们是否改善了结肠直肠癌筛查的性能?为了回答这个问题,我们使用标准的Prescrire方法回顾了现有文献。这些免疫化学测试特定于人类血红蛋白,可自动读取并提供定量结果。它们在检测病变方面的敏感性以及随后需要进行结肠镜检查的患者比例取决于选择的临界值。在9项筛选研究中,包括总共约86 000名参与者,免疫化学测试对结直肠癌的敏感性介于61%到89%之间,具体取决于测试方式和阳性临界值。

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    《Prescrire international》 |2012年第133期|共4页
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  • 正文语种 eng
  • 中图分类 药学;
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