This page is part of the HL7 Terminology (v5.3.0: Release) based on FHIR R4. This is the current published version in its permanent home (it will always be available at this URL). For a full list of available versions, see the Directory of published versions
: StatisticsCode - JSON Representation
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{
"resourceType" : "CodeSystem",
"id" : "observation-statistics",
"meta" : {
"lastUpdated" : "2020-04-09T21:10:28.568+00:00"
},
"text" : {
"status" : "generated",
"div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\">Placeholder</div>"
},
"url" : "http://terminology.hl7.org/CodeSystem/observation-statistics",
"identifier" : [
{
"system" : "urn:ietf:rfc:3986",
"value" : "urn:oid:2.16.840.1.113883.4.642.1.1126"
}
],
"version" : "0.1.0",
"name" : "StatisticsCode",
"title" : "StatisticsCode",
"status" : "draft",
"experimental" : false,
"date" : "2020-04-09T21:10:28+00:00",
"publisher" : "HL7 (FHIR Project)",
"contact" : [
{
"telecom" : [
{
"system" : "url",
"value" : "http://hl7.org/fhir"
},
{
"system" : "email",
"value" : "fhir@lists.hl7.org"
}
]
}
],
"description" : "The statistical operation parameter -\"statistic\" codes.",
"caseSensitive" : true,
"valueSet" : "http://terminology.hl7.org/ValueSet/observation-statistics",
"content" : "complete",
"concept" : [
{
"code" : "average",
"display" : "Average",
"definition" : "The [mean](https://en.wikipedia.org/wiki/Arithmetic_mean) of N measurements over the stated period."
},
{
"code" : "maximum",
"display" : "Maximum",
"definition" : "The [maximum](https://en.wikipedia.org/wiki/Maximal_element) value of N measurements over the stated period."
},
{
"code" : "minimum",
"display" : "Minimum",
"definition" : "The [minimum](https://en.wikipedia.org/wiki/Minimal_element) value of N measurements over the stated period."
},
{
"code" : "count",
"display" : "Count",
"definition" : "The [number] of valid measurements over the stated period that contributed to the other statistical outputs."
},
{
"code" : "total-count",
"display" : "Total Count",
"definition" : "The total [number] of valid measurements over the stated period, including observations that were ignored because they did not contain valid result values."
},
{
"code" : "median",
"display" : "Median",
"definition" : "The [median](https://en.wikipedia.org/wiki/Median) of N measurements over the stated period."
},
{
"code" : "std-dev",
"display" : "Standard Deviation",
"definition" : "The [standard deviation](https://en.wikipedia.org/wiki/Standard_deviation) of N measurements over the stated period."
},
{
"code" : "sum",
"display" : "Sum",
"definition" : "The [sum](https://en.wikipedia.org/wiki/Summation) of N measurements over the stated period."
},
{
"code" : "variance",
"display" : "Variance",
"definition" : "The [variance](https://en.wikipedia.org/wiki/Variance) of N measurements over the stated period."
},
{
"code" : "20-percent",
"display" : "20th Percentile",
"definition" : "The 20th [Percentile](https://en.wikipedia.org/wiki/Percentile) of N measurements over the stated period."
},
{
"code" : "80-percent",
"display" : "80th Percentile",
"definition" : "The 80th [Percentile](https://en.wikipedia.org/wiki/Percentile) of N measurements over the stated period."
},
{
"code" : "4-lower",
"display" : "Lower Quartile",
"definition" : "The lower [Quartile](https://en.wikipedia.org/wiki/Quartile) Boundary of N measurements over the stated period."
},
{
"code" : "4-upper",
"display" : "Upper Quartile",
"definition" : "The upper [Quartile](https://en.wikipedia.org/wiki/Quartile) Boundary of N measurements over the stated period."
},
{
"code" : "4-dev",
"display" : "Quartile Deviation",
"definition" : "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."
},
{
"code" : "5-1",
"display" : "1st Quintile",
"definition" : "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."
},
{
"code" : "5-2",
"display" : "2nd Quintile",
"definition" : "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."
},
{
"code" : "5-3",
"display" : "3rd Quintile",
"definition" : "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."
},
{
"code" : "5-4",
"display" : "4th Quintile",
"definition" : "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."
},
{
"code" : "skew",
"display" : "Skew",
"definition" : "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)."
},
{
"code" : "kurtosis",
"display" : "Kurtosis",
"definition" : "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)."
},
{
"code" : "regression",
"display" : "Regression",
"definition" : "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."
}
]
}
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