Abstract:
:Screening for illness should be an evidence-based activity. Screening tests are useful only if they reduce mortality or morbidity. Therefore, healthcare professionals must know how to evaluate research about screening tests to be sure that, in fact, the tests actually accomplish their goals. Tests that generate many false-positive results may cause harm from anxiety and unnecessary procedures. Tests that generate many false-negative results may worsen outcomes by leading to delayed diagnosis and treatment. Characteristics that make a disease amenable to screening include a significant negative impact on health, an identifiable asymptomatic period, and improved outcomes with early intervention. A useful screening test must have sensitivity and specificity for the disease being screened. It also must be cost effective and acceptable to patients. Sensitivity, specificity, and disease prevalence all interact to determine a test's positive predictive value--the likelihood that a positive test result indicates that the disease is present. Several types of test bias can undermine the validity of a screening trial. Screening bias occurs when the sample of patients used in a trial to evaluate a screening test is not representative of the patient population to be screened. Another bias results from the fact that indolent disease is more likely to be detected in a screening program than aggressive disease. The apparent improved outcome that results is called length bias. Finally, lead-time bias occurs when survival of a screened population is measured from the date of screening, whereas survival of an unscreened population is measured from detection of symptomatic disease. In screening for illnesses, the goal must not be merely to do something. It must be to do something useful.
journal_name
Clin J Oncol Nursjournal_title
Clinical journal of oncology nursingauthors
Fields MM,Chevlen Edoi
10.1188/06.CJON.73-76subject
Has Abstractpub_date
2006-02-01 00:00:00pages
73-6issue
1eissn
1092-1095issn
1538-067Xjournal_volume
10pub_type
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journal_title:Clinical journal of oncology nursing
pub_type: 杂志文章
doi:10.1188/13.CJON.80-83
更新日期:2013-02-01 00:00:00
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journal_title:Clinical journal of oncology nursing
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journal_title:Clinical journal of oncology nursing
pub_type: 杂志文章
doi:10.1188/19.CJON.355-358
更新日期:2019-08-01 00:00:00
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journal_title:Clinical journal of oncology nursing
pub_type: 杂志文章,评审
doi:10.1188/07.CJON.925-927
更新日期:2007-12-01 00:00:00
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journal_title:Clinical journal of oncology nursing
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doi:10.1188/20.CJON.148-152
更新日期:2020-04-01 00:00:00
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journal_title:Clinical journal of oncology nursing
pub_type: 杂志文章
doi:10.1188/18.CJON.565-568
更新日期:2018-10-01 00:00:00
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journal_title:Clinical journal of oncology nursing
pub_type: 杂志文章
doi:10.1188/16.CJON.327-331
更新日期:2016-06-01 00:00:00
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journal_title:Clinical journal of oncology nursing
pub_type: 杂志文章
doi:10.1188/03.CJON.218-221
更新日期:2003-03-01 00:00:00
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journal_title:Clinical journal of oncology nursing
pub_type: 杂志文章,评审
doi:10.1188/16.CJON.385-390
更新日期:2016-08-01 00:00:00
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journal_title:Clinical journal of oncology nursing
pub_type: 杂志文章
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更新日期:2009-06-01 00:00:00
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journal_title:Clinical journal of oncology nursing
pub_type: 杂志文章,评审
doi:10.1188/07.CJON.579-589
更新日期:2007-08-01 00:00:00
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journal_title:Clinical journal of oncology nursing
pub_type: 杂志文章
doi:10.1188/20.CJON.E1-E6
更新日期:2020-02-01 00:00:00
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journal_title:Clinical journal of oncology nursing
pub_type: 杂志文章
doi:10.1188/14.CJON.S1.26-30
更新日期:2014-01-01 00:00:00
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journal_title:Clinical journal of oncology nursing
pub_type: 杂志文章,评审
doi:10.1188/06.CJON.565-566
更新日期:2006-10-01 00:00:00
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journal_title:Clinical journal of oncology nursing
pub_type: 杂志文章,评审
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更新日期:2014-10-01 00:00:00
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journal_title:Clinical journal of oncology nursing
pub_type: 杂志文章
doi:10.1188/16.CJON.566-567
更新日期:2016-10-01 00:00:00
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journal_title:Clinical journal of oncology nursing
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1188/10.CJON.81-86
更新日期:2010-02-01 00:00:00
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journal_title:Clinical journal of oncology nursing
pub_type: 杂志文章
doi:10.1188/17.CJON.673-676
更新日期:2017-12-01 00:00:00
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journal_title:Clinical journal of oncology nursing
pub_type: 杂志文章,评审
doi:
更新日期:2000-05-01 00:00:00
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journal_title:Clinical journal of oncology nursing
pub_type: 杂志文章
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更新日期:2001-11-01 00:00:00
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journal_title:Clinical journal of oncology nursing
pub_type: 杂志文章,评审
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更新日期:2018-12-01 00:00:00
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更新日期:2021-02-01 00:00:00
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journal_title:Clinical journal of oncology nursing
pub_type: 杂志文章,评审
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更新日期:2012-02-01 00:00:00
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journal_title:Clinical journal of oncology nursing
pub_type: 杂志文章
doi:10.1188/20.CJON.648-656
更新日期:2020-12-01 00:00:00
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journal_title:Clinical journal of oncology nursing
pub_type: 杂志文章,评审
doi:10.1188/08.CJON.639-646
更新日期:2008-08-01 00:00:00
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journal_title:Clinical journal of oncology nursing
pub_type: 杂志文章,评审
doi:10.1188/09.CJON.625-627
更新日期:2009-12-01 00:00:00
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journal_title:Clinical journal of oncology nursing
pub_type: 杂志文章
doi:10.1188/13.CJON.S1.22-34
更新日期:2013-02-01 00:00:00
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journal_title:Clinical journal of oncology nursing
pub_type: 杂志文章
doi:10.1188/14.CJON.E93-E96
更新日期:2014-10-01 00:00:00
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journal_title:Clinical journal of oncology nursing
pub_type: 杂志文章
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更新日期:1999-07-01 00:00:00
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journal_title:Clinical journal of oncology nursing
pub_type: 杂志文章
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更新日期:2016-08-01 00:00:00