81258-6
LOINC Code
| LOINC code | 81258-6 | ||||||
|---|---|---|---|---|---|---|---|
| name | |||||||
| description | The fraction of all reads in a study sample at a given genomic locus that identify the allele (variant) in question. For homozygotes it will be close to 1.0; for heterozygotes it will be close to 0.5. It can be less than 0.5 in the case of mosaics or multiple chromosome, or mixtures of tumor cells and normal cells. This measure is an attribute of the variant and applies when the method is a Next Generation Sequencing (NGS) or similar. Such methods provide many reads from the sample for each locus. To report population allelic frequency, see [LOINC: 92821-8]. Allelic frequency is usually reported as a decimal fraction for both Sample Variant Allelic Frequency and Population Allelic Frequency, although it is occasionally reported as a percent. Special care/caution should be taken when reporting and converting to a decimal fraction. | ||||||
| status | ACTIVE | ||||||
Fully-Specified Name | |||||||
| component | Sample variant allelic frequency | ||||||
| property | NFr = Number Fraction | ||||||
| time | Pt = Point in time: To identify measures at a point in time. This is a synonym for “spot” or “random” as applied to urine measurements. | ||||||
| system | ^Patient | ||||||
| scale | Qn = Quantitative: The result of the test is a numeric value that relates to a continuous numeric scale. Reported either as an integer, a ratio, a real number, or a range. The test result value may optionally contain a relational operator from the set {<=, <, >, >=}. Valid values for a quantitative test are of the form "7", "-7", "7.4", "-7.4", "7.8912", "0.125", "<10", "<10.15", ">12000", 1-10, 1:256 | ||||||
| method | |||||||
Additional Names | |||||||
| short name | Allelic fraction; Molecular pathology; MOLPATH; Novel allelic frequency; Number fraction; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random; VAF | ||||||
Basic Attributes | |||||||
| class | MOLPATH | ||||||
| type | 1 Laboratory | ||||||
| order vs. observation | Sample VAF | ||||||
| example UCUM units | % The Unified Code for Units of Measure (UCUM) is a code system intended to include all units of measures being contemporarily used in international science, engineering, and business (www.unitsofmeasure.org) | ||||||
Member of these Panels | |||||||
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History/Usage | |||||||
| first released | |||||||
| last updated | 2.73 | ||||||
| last change type | MIN - change to field other than name | ||||||
| change reason | % | ||||||
Related Names | |||||||
Copyright © 2026 Regenstrief Institute, Inc. All Rights Reserved. To the extent included herein, the LOINC table and LOINC codes are copyright © 1995-2026, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. See https://loinc.org/license for the full LOINC copyright and license.
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