false negative


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false neg·a·tive

(fawls neg'ă-tiv),
1. A test result that erroneously excludes someone from a specific diagnostic or reference group.
2. A patient whose test results exclude that person from a particular diagnostic group to which the person ought truly belong.
3. Term commonly used to denote a false-negative result.
Farlex Partner Medical Dictionary © Farlex 2012

false negative

n.
A test result that is false-negative.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

false negative

A term of art referring to a person with a negative test result, who actually has a target condition.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

false negative

Diagnostic medicine A test result–eg, Pap smear, mammography, from a Pt who has a particular disease, which is negative or does not detect the presence of an analyte that is usually abnormal in the disease of interest. See Four-cell diagnostic matrix, Cf False positive NIHspeak An active substance or result incorrectly identified as negative by an assay or test.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

false neg·a·tive

(fawls neg'ă-tiv)
1. A test result that erroneously excludes a person from a specific diagnostic or reference group.
2. A person excluded by erroneous test results from a particular diagnostic group.
3. A false-negative test result.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

False negative

Test results showing no problem when one exists.
Mentioned in: Stress Test
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.

false neg·a·tive

(fawls neg'ă-tiv)
1. A test result that erroneously excludes someone from a specific diagnostic or reference group.
2. A patient whose test results exclude that person from a particular diagnostic group to which the person ought truly belong.
3. Term commonly used to denote a false-negative reaction (q.v.).
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
When respondents report false negatives for Medicaid and also do not have any other form of government or private insurance, then those persons incorrectly increase the uninsured population.
Therefore, a fixed tolerance range of 50% for all compounds could potentially result in high false negatives for tetracyclines and quinolones and high false positives for the other PPCPs.
Ideally for a good diagnostic test, overall accuracy should be 1 (or 100%) and it is possible only when false negative and false positive are zero.
Accuracy= True Positive + True Negative x 100 / True Positive + False Positive + True Negative + False Negative
(15, 16) Depending on the size of the hospital, yearly admission rates, and incidence in the population, the potential incremental costs associated with MRSA false negative results can exceed hundreds of thousands of dollars per year per hospital.
One can arrive at the relative costs by deciding how many false positives one will accept for every false negative, or equivalently, how many false negatives one will accept for every false positive.
The estimated rate of false negatives (Maltreatment/ No Referral cell) is somewhat lower for Blacks (24.6) than the overall false negative rate (29.8) although still somewhat higher than for Hispanics (20.1) and Whites (20.2).
3) Kits may register false positive and false negative results.
I am not aware of any substances that cause a false negative. Most of the "urine cleaners" cause the test to be classified as "invalid" or "adulterated." In such a situation, the donor is required to provide a urine specimen under direct observation of a collector.
While this method improves detection of some attacks, it alarms in some cases where there is no attack (false positive) while missing other attacks (false negative).