@prefix fhir: <http://hl7.org/fhir/> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

# - resource -------------------------------------------------------------------

<http://terminology.hl7.org/CodeSystem/observation-statistics> a fhir:CodeSystem;
  fhir:nodeRole fhir:treeRoot;
  fhir:Resource.id [ fhir:value "observation-statistics"];
  fhir:Resource.meta [
     fhir:Meta.lastUpdated [ fhir:value "2020-04-09T21:10:28.568+00:00"^^xsd:dateTime ]
  ];
  fhir:DomainResource.text [
     fhir:Narrative.status [ fhir:value "generated" ];
     fhir:Narrative.div "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n            \n      <h2>StatisticsCode</h2>\n            \n      <div>\n              \n        <p>The statistical operation parameter -&quot;statistic&quot; codes.</p>\n\n            \n      </div>\n            \n      <p>This code system http://terminology.hl7.org/CodeSystem/observation-statistics defines the following codes:</p>\n            \n      <table class=\"codes\">\n              \n        <tr>\n                \n          <td style=\"white-space:nowrap\">\n                  \n            <b>Code</b>\n                \n          </td>\n                \n          <td>\n                  \n            <b>Display</b>\n                \n          </td>\n                \n          <td>\n                  \n            <b>Definition</b>\n                \n          </td>\n              \n        </tr>\n              \n        <tr>\n                \n          <td style=\"white-space:nowrap\">average\n                  \n            <a name=\"observation-statistics-average\"> </a>\n                \n          </td>\n                \n          <td>Average</td>\n                \n          <td>The [mean](https://en.wikipedia.org/wiki/Arithmetic_mean) of N measurements over the stated period.</td>\n              \n        </tr>\n              \n        <tr>\n                \n          <td style=\"white-space:nowrap\">maximum\n                  \n            <a name=\"observation-statistics-maximum\"> </a>\n                \n          </td>\n                \n          <td>Maximum</td>\n                \n          <td>The [maximum](https://en.wikipedia.org/wiki/Maximal_element) value of N measurements over the stated period.</td>\n              \n        </tr>\n              \n        <tr>\n                \n          <td style=\"white-space:nowrap\">minimum\n                  \n            <a name=\"observation-statistics-minimum\"> </a>\n                \n          </td>\n                \n          <td>Minimum</td>\n                \n          <td>The [minimum](https://en.wikipedia.org/wiki/Minimal_element) value of N measurements over the stated period.</td>\n              \n        </tr>\n              \n        <tr>\n                \n          <td style=\"white-space:nowrap\">count\n                  \n            <a name=\"observation-statistics-count\"> </a>\n                \n          </td>\n                \n          <td>Count</td>\n                \n          <td>The [number] of valid measurements over the stated period that contributed to the other statistical outputs.</td>\n              \n        </tr>\n              \n        <tr>\n                \n          <td style=\"white-space:nowrap\">total-count\n                  \n            <a name=\"observation-statistics-total-count\"> </a>\n                \n          </td>\n                \n          <td>Total Count</td>\n                \n          <td>The total [number] of valid measurements over the stated period, including observations that were ignored because they did not contain valid result values.</td>\n              \n        </tr>\n              \n        <tr>\n                \n          <td style=\"white-space:nowrap\">median\n                  \n            <a name=\"observation-statistics-median\"> </a>\n                \n          </td>\n                \n          <td>Median</td>\n                \n          <td>The [median](https://en.wikipedia.org/wiki/Median) of N measurements over the stated period.</td>\n              \n        </tr>\n              \n        <tr>\n                \n          <td style=\"white-space:nowrap\">std-dev\n                  \n            <a name=\"observation-statistics-std-dev\"> </a>\n                \n          </td>\n                \n          <td>Standard Deviation</td>\n                \n          <td>The [standard deviation](https://en.wikipedia.org/wiki/Standard_deviation) of N measurements over the stated period.</td>\n              \n        </tr>\n              \n        <tr>\n                \n          <td style=\"white-space:nowrap\">sum\n                  \n            <a name=\"observation-statistics-sum\"> </a>\n                \n          </td>\n                \n          <td>Sum</td>\n                \n          <td>The [sum](https://en.wikipedia.org/wiki/Summation) of N measurements over the stated period.</td>\n              \n        </tr>\n              \n        <tr>\n                \n          <td style=\"white-space:nowrap\">variance\n                  \n            <a name=\"observation-statistics-variance\"> </a>\n                \n          </td>\n                \n          <td>Variance</td>\n                \n          <td>The [variance](https://en.wikipedia.org/wiki/Variance) of N measurements over the stated period.</td>\n              \n        </tr>\n              \n        <tr>\n                \n          <td style=\"white-space:nowrap\">20-percent\n                  \n            <a name=\"observation-statistics-20-percent\"> </a>\n                \n          </td>\n                \n          <td>20th Percentile</td>\n                \n          <td>The 20th [Percentile](https://en.wikipedia.org/wiki/Percentile) of N measurements over the stated period.</td>\n              \n        </tr>\n              \n        <tr>\n                \n          <td style=\"white-space:nowrap\">80-percent\n                  \n            <a name=\"observation-statistics-80-percent\"> </a>\n                \n          </td>\n                \n          <td>80th Percentile</td>\n                \n          <td>The 80th [Percentile](https://en.wikipedia.org/wiki/Percentile) of N measurements over the stated period.</td>\n              \n        </tr>\n              \n        <tr>\n                \n          <td style=\"white-space:nowrap\">4-lower\n                  \n            <a name=\"observation-statistics-4-lower\"> </a>\n                \n          </td>\n                \n          <td>Lower Quartile</td>\n                \n          <td>The lower [Quartile](https://en.wikipedia.org/wiki/Quartile) Boundary of N measurements over the stated period.</td>\n              \n        </tr>\n              \n        <tr>\n                \n          <td style=\"white-space:nowrap\">4-upper\n                  \n            <a name=\"observation-statistics-4-upper\"> </a>\n                \n          </td>\n                \n          <td>Upper Quartile</td>\n                \n          <td>The upper [Quartile](https://en.wikipedia.org/wiki/Quartile) Boundary of N measurements over the stated period.</td>\n              \n        </tr>\n              \n        <tr>\n                \n          <td style=\"white-space:nowrap\">4-dev\n                  \n            <a name=\"observation-statistics-4-dev\"> </a>\n                \n          </td>\n                \n          <td>Quartile Deviation</td>\n                \n          <td>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.</td>\n              \n        </tr>\n              \n        <tr>\n                \n          <td style=\"white-space:nowrap\">5-1\n                  \n            <a name=\"observation-statistics-5-1\"> </a>\n                \n          </td>\n                \n          <td>1st Quintile</td>\n                \n          <td>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.</td>\n              \n        </tr>\n              \n        <tr>\n                \n          <td style=\"white-space:nowrap\">5-2\n                  \n            <a name=\"observation-statistics-5-2\"> </a>\n                \n          </td>\n                \n          <td>2nd Quintile</td>\n                \n          <td>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.</td>\n              \n        </tr>\n              \n        <tr>\n                \n          <td style=\"white-space:nowrap\">5-3\n                  \n            <a name=\"observation-statistics-5-3\"> </a>\n                \n          </td>\n                \n          <td>3rd Quintile</td>\n                \n          <td>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.</td>\n              \n        </tr>\n              \n        <tr>\n                \n          <td style=\"white-space:nowrap\">5-4\n                  \n            <a name=\"observation-statistics-5-4\"> </a>\n                \n          </td>\n                \n          <td>4th Quintile</td>\n                \n          <td>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.</td>\n              \n        </tr>\n              \n        <tr>\n                \n          <td style=\"white-space:nowrap\">skew\n                  \n            <a name=\"observation-statistics-skew\"> </a>\n                \n          </td>\n                \n          <td>Skew</td>\n                \n          <td>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).</td>\n              \n        </tr>\n              \n        <tr>\n                \n          <td style=\"white-space:nowrap\">kurtosis\n                  \n            <a name=\"observation-statistics-kurtosis\"> </a>\n                \n          </td>\n                \n          <td>Kurtosis</td>\n                \n          <td>Kurtosis  is a measure of the &quot;tailedness&quot; of the probability distribution of a real-valued random variable.   Source: [Wikipedia](https://en.wikipedia.org/wiki/Kurtosis).</td>\n              \n        </tr>\n              \n        <tr>\n                \n          <td style=\"white-space:nowrap\">regression\n                  \n            <a name=\"observation-statistics-regression\"> </a>\n                \n          </td>\n                \n          <td>Regression</td>\n                \n          <td>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.</td>\n              \n        </tr>\n            \n      </table>\n          \n    </div>"
  ];
  fhir:CodeSystem.url [ fhir:value "http://terminology.hl7.org/CodeSystem/observation-statistics"];
  fhir:CodeSystem.identifier [
     fhir:index 0;
     fhir:Identifier.system [ fhir:value "urn:ietf:rfc:3986" ];
     fhir:Identifier.value [ fhir:value "urn:oid:2.16.840.1.113883.4.642.1.1126" ]
  ];
  fhir:CodeSystem.version [ fhir:value "4.2.0"];
  fhir:CodeSystem.name [ fhir:value "StatisticsCode"];
  fhir:CodeSystem.title [ fhir:value "StatisticsCode"];
  fhir:CodeSystem.status [ fhir:value "draft"];
  fhir:CodeSystem.experimental [ fhir:value "false"^^xsd:boolean];
  fhir:CodeSystem.date [ fhir:value "2020-04-09T21:10:28+00:00"^^xsd:dateTime];
  fhir:CodeSystem.publisher [ fhir:value "HL7 (FHIR Project)"];
  fhir:CodeSystem.contact [
     fhir:index 0;
     fhir:ContactDetail.telecom [
       fhir:index 0;
       fhir:ContactPoint.system [ fhir:value "url" ];
       fhir:ContactPoint.value [ fhir:value "http://hl7.org/fhir" ]
     ], [
       fhir:index 1;
       fhir:ContactPoint.system [ fhir:value "email" ];
       fhir:ContactPoint.value [ fhir:value "fhir@lists.hl7.org" ]
     ]
  ];
  fhir:CodeSystem.description [ fhir:value "The statistical operation parameter -\"statistic\" codes."];
  fhir:CodeSystem.caseSensitive [ fhir:value "true"^^xsd:boolean];
  fhir:CodeSystem.valueSet [
     fhir:value "http://terminology.hl7.org/ValueSet/observation-statistics";
     fhir:link <http://terminology.hl7.org/ValueSet/observation-statistics>
  ];
  fhir:CodeSystem.content [ fhir:value "complete"];
  fhir:CodeSystem.concept [
     fhir:index 0;
     fhir:CodeSystem.concept.code [ fhir:value "average" ];
     fhir:CodeSystem.concept.display [ fhir:value "Average" ];
     fhir:CodeSystem.concept.definition [ fhir:value "The [mean](https://en.wikipedia.org/wiki/Arithmetic_mean) of N measurements over the stated period." ]
  ], [
     fhir:index 1;
     fhir:CodeSystem.concept.code [ fhir:value "maximum" ];
     fhir:CodeSystem.concept.display [ fhir:value "Maximum" ];
     fhir:CodeSystem.concept.definition [ fhir:value "The [maximum](https://en.wikipedia.org/wiki/Maximal_element) value of N measurements over the stated period." ]
  ], [
     fhir:index 2;
     fhir:CodeSystem.concept.code [ fhir:value "minimum" ];
     fhir:CodeSystem.concept.display [ fhir:value "Minimum" ];
     fhir:CodeSystem.concept.definition [ fhir:value "The [minimum](https://en.wikipedia.org/wiki/Minimal_element) value of N measurements over the stated period." ]
  ], [
     fhir:index 3;
     fhir:CodeSystem.concept.code [ fhir:value "count" ];
     fhir:CodeSystem.concept.display [ fhir:value "Count" ];
     fhir:CodeSystem.concept.definition [ fhir:value "The [number] of valid measurements over the stated period that contributed to the other statistical outputs." ]
  ], [
     fhir:index 4;
     fhir:CodeSystem.concept.code [ fhir:value "total-count" ];
     fhir:CodeSystem.concept.display [ fhir:value "Total Count" ];
     fhir:CodeSystem.concept.definition [ fhir:value "The total [number] of valid measurements over the stated period, including observations that were ignored because they did not contain valid result values." ]
  ], [
     fhir:index 5;
     fhir:CodeSystem.concept.code [ fhir:value "median" ];
     fhir:CodeSystem.concept.display [ fhir:value "Median" ];
     fhir:CodeSystem.concept.definition [ fhir:value "The [median](https://en.wikipedia.org/wiki/Median) of N measurements over the stated period." ]
  ], [
     fhir:index 6;
     fhir:CodeSystem.concept.code [ fhir:value "std-dev" ];
     fhir:CodeSystem.concept.display [ fhir:value "Standard Deviation" ];
     fhir:CodeSystem.concept.definition [ fhir:value "The [standard deviation](https://en.wikipedia.org/wiki/Standard_deviation) of N measurements over the stated period." ]
  ], [
     fhir:index 7;
     fhir:CodeSystem.concept.code [ fhir:value "sum" ];
     fhir:CodeSystem.concept.display [ fhir:value "Sum" ];
     fhir:CodeSystem.concept.definition [ fhir:value "The [sum](https://en.wikipedia.org/wiki/Summation) of N measurements over the stated period." ]
  ], [
     fhir:index 8;
     fhir:CodeSystem.concept.code [ fhir:value "variance" ];
     fhir:CodeSystem.concept.display [ fhir:value "Variance" ];
     fhir:CodeSystem.concept.definition [ fhir:value "The [variance](https://en.wikipedia.org/wiki/Variance) of N measurements over the stated period." ]
  ], [
     fhir:index 9;
     fhir:CodeSystem.concept.code [ fhir:value "20-percent" ];
     fhir:CodeSystem.concept.display [ fhir:value "20th Percentile" ];
     fhir:CodeSystem.concept.definition [ fhir:value "The 20th [Percentile](https://en.wikipedia.org/wiki/Percentile) of N measurements over the stated period." ]
  ], [
     fhir:index 10;
     fhir:CodeSystem.concept.code [ fhir:value "80-percent" ];
     fhir:CodeSystem.concept.display [ fhir:value "80th Percentile" ];
     fhir:CodeSystem.concept.definition [ fhir:value "The 80th [Percentile](https://en.wikipedia.org/wiki/Percentile) of N measurements over the stated period." ]
  ], [
     fhir:index 11;
     fhir:CodeSystem.concept.code [ fhir:value "4-lower" ];
     fhir:CodeSystem.concept.display [ fhir:value "Lower Quartile" ];
     fhir:CodeSystem.concept.definition [ fhir:value "The lower [Quartile](https://en.wikipedia.org/wiki/Quartile) Boundary of N measurements over the stated period." ]
  ], [
     fhir:index 12;
     fhir:CodeSystem.concept.code [ fhir:value "4-upper" ];
     fhir:CodeSystem.concept.display [ fhir:value "Upper Quartile" ];
     fhir:CodeSystem.concept.definition [ fhir:value "The upper [Quartile](https://en.wikipedia.org/wiki/Quartile) Boundary of N measurements over the stated period." ]
  ], [
     fhir:index 13;
     fhir:CodeSystem.concept.code [ fhir:value "4-dev" ];
     fhir:CodeSystem.concept.display [ fhir:value "Quartile Deviation" ];
     fhir:CodeSystem.concept.definition [ fhir:value "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." ]
  ], [
     fhir:index 14;
     fhir:CodeSystem.concept.code [ fhir:value "5-1" ];
     fhir:CodeSystem.concept.display [ fhir:value "1st Quintile" ];
     fhir:CodeSystem.concept.definition [ fhir:value "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." ]
  ], [
     fhir:index 15;
     fhir:CodeSystem.concept.code [ fhir:value "5-2" ];
     fhir:CodeSystem.concept.display [ fhir:value "2nd Quintile" ];
     fhir:CodeSystem.concept.definition [ fhir:value "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." ]
  ], [
     fhir:index 16;
     fhir:CodeSystem.concept.code [ fhir:value "5-3" ];
     fhir:CodeSystem.concept.display [ fhir:value "3rd Quintile" ];
     fhir:CodeSystem.concept.definition [ fhir:value "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." ]
  ], [
     fhir:index 17;
     fhir:CodeSystem.concept.code [ fhir:value "5-4" ];
     fhir:CodeSystem.concept.display [ fhir:value "4th Quintile" ];
     fhir:CodeSystem.concept.definition [ fhir:value "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." ]
  ], [
     fhir:index 18;
     fhir:CodeSystem.concept.code [ fhir:value "skew" ];
     fhir:CodeSystem.concept.display [ fhir:value "Skew" ];
     fhir:CodeSystem.concept.definition [ fhir:value "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)." ]
  ], [
     fhir:index 19;
     fhir:CodeSystem.concept.code [ fhir:value "kurtosis" ];
     fhir:CodeSystem.concept.display [ fhir:value "Kurtosis" ];
     fhir:CodeSystem.concept.definition [ fhir:value "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)." ]
  ], [
     fhir:index 20;
     fhir:CodeSystem.concept.code [ fhir:value "regression" ];
     fhir:CodeSystem.concept.display [ fhir:value "Regression" ];
     fhir:CodeSystem.concept.definition [ fhir:value "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." ]
  ] .

# - ontology header ------------------------------------------------------------

<http://terminology.hl7.org/CodeSystem/observation-statistics.ttl> a owl:Ontology;
  owl:imports fhir:fhir.ttl .

# -------------------------------------------------------------------------------------