observation-statistics
type: CodeSystem
node role: treeRoot
id:
  v: observation-statistics
meta:
  last updated:
    v: 2020-04-09T21:10:28.568+00:00
text:
  status:
    v: generated
  div: Generated Narrative: CodeSystem observation-statistics Last updated: 2020-04-09 21:10:28+0000 This case-sensitive code system http://terminology.hl7.org/CodeSystem/observation-statistics defines the following codes: Code Display Definition average Average The mean of N measurements over the stated period. maximum Maximum The maximum value of N measurements over the stated period. minimum Minimum The minimum value of N measurements over the stated period. count Count The [number] of valid measurements over the stated period that contributed to the other statistical outputs. total-count Total Count The total [number] of valid measurements over the stated period, including observations that were ignored because they did not contain valid result values. median Median The median of N measurements over the stated period. std-dev Standard Deviation The standard deviation of N measurements over the stated period. sum Sum The sum of N measurements over the stated period. variance Variance The variance of N measurements over the stated period. 20-percent 20th Percentile The 20th Percentile of N measurements over the stated period. 80-percent 80th Percentile The 80th Percentile of N measurements over the stated period. 4-lower Lower Quartile The lower Quartile Boundary of N measurements over the stated period. 4-upper Upper Quartile The upper Quartile Boundary of N measurements over the stated period. 4-dev Quartile Deviation The difference between the upper and lower Quartiles is called the Interquartile range. (IQR = Q3-Q1) Quartile deviation or Semi-interquartile range is one-half the difference between the first and the third quartiles. 5-1 1st Quintile The lowest of four values that divide the N measurements into a frequency distribution of five classes with each containing one fifth of the total population. 5-2 2nd Quintile The second of four values that divide the N measurements into a frequency distribution of five classes with each containing one fifth of the total po…
url:
  v: http://terminology.hl7.org/CodeSystem/observation-statistics
identifier:
  system:
    v: urn:ietf:rfc:3986
  value:
    v: urn:oid:2.16.840.1.113883.4.642.1.1126
version:
  v: 1.0.0
name:
  v: StatisticsCode
title:
  v: StatisticsCode
status:
  v: draft
experimental:
  v: false
date:
  v: 2020-04-09T21:10:28+00:00
publisher:
  v: Health Level Seven International
contact:
  telecom:
    system:
      v: url
    value:
      v: http://hl7.org
  telecom:
    system:
      v: email
description:
  v: The statistical operation parameter -"statistic" codes.
copyright:
  v: This material derives from the HL7 Terminology (THO). THO is copyright ©1989+ Health Level Seven International and is made available under the CC0 designation. For more licensing information see: https://terminology.hl7.org/license.html
case sensitive:
  v: true
value set:
  v: http://terminology.hl7.org/ValueSet/observation-statistics
  link: http://terminology.hl7.org/ValueSet/observation-statistics
content:
  v: complete
concept:
  code:
    v: average
  display:
    v: Average
  definition:
    v: The [mean](https://en.wikipedia.org/wiki/Arithmetic_mean) of N measurements over the stated period.
concept:
  code:
    v: maximum
  display:
    v: Maximum
  definition:
    v: The [maximum](https://en.wikipedia.org/wiki/Maximal_element) value of N measurements over the stated period.
concept:
  code:
    v: minimum
  display:
    v: Minimum
  definition:
    v: The [minimum](https://en.wikipedia.org/wiki/Minimal_element) value of N measurements over the stated period.
concept:
  code:
    v: count
  display:
    v: Count
  definition:
    v: The [number] of valid measurements over the stated period that contributed to the other statistical outputs.
concept:
  code:
    v: total-count
  display:
    v: Total Count
  definition:
    v: The total [number] of valid measurements over the stated period, including observations that were ignored because they did not contain valid result values.
concept:
  code:
    v: median
  display:
    v: Median
  definition:
    v: The [median](https://en.wikipedia.org/wiki/Median) of N measurements over the stated period.
concept:
  code:
    v: std-dev
  display:
    v: Standard Deviation
  definition:
    v: The [standard deviation](https://en.wikipedia.org/wiki/Standard_deviation) of N measurements over the stated period.
concept:
  code:
    v: sum
  display:
    v: Sum
  definition:
    v: The [sum](https://en.wikipedia.org/wiki/Summation) of N measurements over the stated period.
concept:
  code:
    v: variance
  display:
    v: Variance
  definition:
    v: The [variance](https://en.wikipedia.org/wiki/Variance) of N measurements over the stated period.
concept:
  code:
    v: 20-percent
  display:
    v: 20th Percentile
  definition:
    v: The 20th [Percentile](https://en.wikipedia.org/wiki/Percentile) of N measurements over the stated period.
concept:
  code:
    v: 80-percent
  display:
    v: 80th Percentile
  definition:
    v: The 80th [Percentile](https://en.wikipedia.org/wiki/Percentile) of N measurements over the stated period.
concept:
  code:
    v: 4-lower
  display:
    v: Lower Quartile
  definition:
    v: The lower [Quartile](https://en.wikipedia.org/wiki/Quartile) Boundary of N measurements over the stated period.
concept:
  code:
    v: 4-upper
  display:
    v: Upper Quartile
  definition:
    v: The upper [Quartile](https://en.wikipedia.org/wiki/Quartile) Boundary of N measurements over the stated period.
concept:
  code:
    v: 4-dev
  display:
    v: Quartile Deviation
  definition:
    v: The difference between the upper and lower [Quartiles](https://en.wikipedia.org/wiki/Quartile) is called the Interquartile range. (IQR = Q3-Q1) Quartile deviation or Semi-interquartile range is one-half the difference between the first and the third quartiles.
concept:
  code:
    v: 5-1
  display:
    v: 1st Quintile
  definition:
    v: The lowest of four values that divide the N measurements into a frequency distribution of five classes with each containing one fifth of the total population.
concept:
  code:
    v: 5-2
  display:
    v: 2nd Quintile
  definition:
    v: The second of four values that divide the N measurements into a frequency distribution of five classes with each containing one fifth of the total population.
concept:
  code:
    v: 5-3
  display:
    v: 3rd Quintile
  definition:
    v: The third of four values that divide the N measurements into a frequency distribution of five classes with each containing one fifth of the total population.
concept:
  code:
    v: 5-4
  display:
    v: 4th Quintile
  definition:
    v: The fourth of four values that divide the N measurements into a frequency distribution of five classes with each containing one fifth of the total population.
concept:
  code:
    v: skew
  display:
    v: Skew
  definition:
    v: Skewness is a measure of the asymmetry of the probability distribution of a real-valued random variable about its mean. The skewness value can be positive or negative, or even undefined. Source: [Wikipedia](https://en.wikipedia.org/wiki/Skewness).
concept:
  code:
    v: kurtosis
  display:
    v: Kurtosis
  definition:
    v: Kurtosis is a measure of the "tailedness" of the probability distribution of a real-valued random variable. Source: [Wikipedia](https://en.wikipedia.org/wiki/Kurtosis).
concept:
  code:
    v: regression
  display:
    v: Regression
  definition:
    v: Linear regression is an approach for modeling two-dimensional sample points with one independent variable and one dependent variable (conventionally, the x and y coordinates in a Cartesian coordinate system) and finds a linear function (a non-vertical straight line) that, as accurately as possible, predicts the dependent variable values as a function of the independent variables. Source: [Wikipedia](https://en.wikipedia.org/wiki/Simple_linear_regression) This Statistic code will return both a gradient and an intercept value.