Abstract：
:Three currently used screening methods are aimed at detecting colorectal cancer when it is asymptomatic and curable, and at detecting polyps so that they can be removed before they can progress to cancer. Digital rectal examinations are relatively cheap and easy but can detect only a small fraction of large-bowel cancers. Sigmoidoscopy is more sensitive, but its low acceptability to patients has been only partially mitigated by the introduction of the 35-cm flexible instrument. Fecal occult blood testing has limited sensitivity because blood from cancers and polyps is neither continuously shed nor uniformly distributed in feces; specificity and positive predictive value are also low because of other sources of blood in the stool. Prudent judgment suggests that all of these screening tests may prevent death from colorectal cancer in some patients. However, none has been proven effective in general use by well-controlled studies. Case-control studies can provide timely and valuable new evidence in this regard; the authors' investigations in progress are described. The current lack of strong evidence in support of these screening tests should not be interpreted as evidence against their use.
journal_name
J Gen Intern Medjournal_title
Journal of general internal medicineauthors
Friedman GD,Selby JVdoi
10.1007/BF02600836subject
Has Abstractpub_date
1990-09-01 00:00:00pages
S23-7issue
5 Suppleissn
0884-8734issn
1525-1497journal_volume
5pub_type
杂志文章abstract：:Decision analysis is a tool that clinicians can use to choose an option that maximizes the overall net benefit to a patient. It is an explicit, quantitative, and systematic approach to decision making under conditions of uncertainty. In this article, we present two teaching tips aimed at helping clinical learners unde...
journal_title：Journal of general internal medicine
pub_type： 杂志文章
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abstract：BACKGROUND:In countries with public health system, hospital bed reductions and increasing social and medical frailty have led to the phenomenon of "outliers" or "outlying hospital in-patients." They are often medical patients who, because of unavailability of beds in their clinically appropriate ward, are admitted wher...
journal_title：Journal of general internal medicine
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journal_title：Journal of general internal medicine
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journal_title：Journal of general internal medicine
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doi：10.1007/s11606-015-3216-7
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journal_title：Journal of general internal medicine
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journal_title：Journal of general internal medicine
pub_type： 杂志文章
doi：10.1007/BF02602350
更新日期：1989-03-01 00:00:00
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journal_title：Journal of general internal medicine
pub_type： 杂志文章
doi：10.1111/j.1525-1497.2004.30065.x
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journal_title：Journal of general internal medicine
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更新日期：1986-11-01 00:00:00
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journal_title：Journal of general internal medicine
pub_type： 杂志文章
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journal_title：Journal of general internal medicine
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doi：10.1111/j.1525-1497.2004.30011.x
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journal_title：Journal of general internal medicine
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journal_title：Journal of general internal medicine
pub_type： 杂志文章,评审
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更新日期：2003-10-01 00:00:00
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journal_title：Journal of general internal medicine
pub_type： 杂志文章
doi：10.1111/j.1525-1497.2006.00362.x
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journal_title：Journal of general internal medicine
pub_type： 杂志文章,meta分析
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更新日期：2019-10-01 00:00:00
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journal_title：Journal of general internal medicine
pub_type： 杂志文章
doi：10.1111/j.1525-1497.2005.0133.x
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journal_title：Journal of general internal medicine
pub_type： 杂志文章,评审
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更新日期：2015-04-01 00:00:00
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journal_title：Journal of general internal medicine
pub_type： 杂志文章
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更新日期：2013-04-01 00:00:00
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journal_title：Journal of general internal medicine
pub_type： 杂志文章,多中心研究
doi：10.1111/j.1525-1497.2005.30145.x
更新日期：2005-04-01 00:00:00
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journal_title：Journal of general internal medicine
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doi：10.1007/s11606-009-1143-1
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pub_type： 杂志文章,多中心研究
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journal_title：Journal of general internal medicine
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journal_title：Journal of general internal medicine
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更新日期：2015-10-01 00:00:00
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journal_title：Journal of general internal medicine
pub_type： 杂志文章
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更新日期：2001-02-01 00:00:00
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journal_title：Journal of general internal medicine
pub_type： 杂志文章
doi：10.1007/s11606-007-0127-2
更新日期：2007-04-01 00:00:00
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journal_title：Journal of general internal medicine
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doi：10.1111/j.1525-1497.2004.30052.x
更新日期：2005-01-01 00:00:00
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journal_title：Journal of general internal medicine
pub_type： 杂志文章
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更新日期：1998-10-01 00:00:00
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journal_title：Journal of general internal medicine
pub_type： 杂志文章,随机对照试验
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更新日期：2006-07-01 00:00:00
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journal_title：Journal of general internal medicine
pub_type： 杂志文章,评审
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journal_title：Journal of general internal medicine
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更新日期：2016-08-01 00:00:00
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journal_title：Journal of general internal medicine
pub_type： 杂志文章
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更新日期：2010-08-01 00:00:00
