<status value="active"/> <experimental value="false"/> <date value="2025-09-01T22:35:57.422149+10:00"/> <publisher value="FHIR Infrastructure"/> <contact> <name value="FHIR Infrastructure"/> <telecom> <system value="url"/> <value value="http://www.hl7.org/Special/committees/fiwg"/> </telecom> </contact> <description value="This cross-version ValueSet represents concepts from http://hl7.org/fhir/ValueSet/observation-statistics|3.0.2 for use in FHIR R4. Concepts not present here have direct `equivalent` mappings crossing all versions from R3 to R4."/> <jurisdiction> <coding> <system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/> <code value="001"/> <display value="World"/> </coding> </jurisdiction> <compose> <include> <system value="http://hl7.org/fhir/observation-statistics"/> <version value="3.0.2"/> <concept> <code value="average"/> <display value="Average"/> </concept> <concept> <code value="maximum"/> <display value="Maximum"/> </concept> <concept> <code value="minimum"/> <display value="Minimum"/> </concept> <concept> <code value="count"/> <display value="Count"/> </concept> <concept> <code value="totalcount"/> <display value="Total Count"/> </concept> <concept> <code value="median"/> <display value="Median"/> </concept> <concept> <code value="std-dev"/> <display value="Standard Deviation"/> </concept> <concept> <code value="sum"/> <display value="Sum"/> </concept> <concept> <code value="variance"/> <display value="Variance"/> </concept> <concept> <code value="20-percent"/> <display value="20th Percentile"/> </concept> <concept> <code value="80-percent"/> <display value="80th Percentile"/> </concept> <concept> <code value="4-lower"/> <display value="Lower Quartile"/> </concept> <concept> <code value="4-upper"/> <display value="Upper Quartile"/> </concept> <concept> <code value="4-dev"/> <display value="Quartile Deviation"/> </concept> <concept> <code value="5-1"/> <display value="1st Quintile"/> </concept> <concept> <code value="5-2"/> <display value="2nd Quintile"/> </concept> <concept> <code value="5-3"/> <display value="3rd Quintile"/> </concept> <concept> <code value="5-4"/> <display value="4th Quintile"/> </concept> <concept> <code value="skew"/> <display value="Skew"/> </concept> <concept> <code value="kurtosis"/> <display value="Kurtosis"/> </concept> <concept> <code value="regression"/> <display value="Regression"/> </concept> </include> </compose> <expansion> <timestamp value="2025-09-01T22:35:57.42215+10:00"/> <contains> <system value="http://hl7.org/fhir/observation-statistics"/> <version value="3.0.2"/> <code value="average"/> <display value="Average"/> </contains> <contains> <system value="http://hl7.org/fhir/observation-statistics"/> <version value="3.0.2"/> <code value="maximum"/> <display value="Maximum"/> </contains> <contains> <system value="http://hl7.org/fhir/observation-statistics"/> <version value="3.0.2"/> <code value="minimum"/> <display value="Minimum"/> </contains> <contains> <system value="http://hl7.org/fhir/observation-statistics"/> <version value="3.0.2"/> <code value="count"/> <display value="Count"/> </contains> <contains> <system value="http://hl7.org/fhir/observation-statistics"/> <version value="3.0.2"/> <code value="totalcount"/> <display value="Total Count"/> </contains> <contains> <system value="http://hl7.org/fhir/observation-statistics"/> <version value="3.0.2"/> <code value="median"/> <display value="Median"/> </contains> <contains> <system value="http://hl7.org/fhir/observation-statistics"/> <version value="3.0.2"/> <code value="std-dev"/> <display value="Standard Deviation"/> </contains> <contains> <system value="http://hl7.org/fhir/observation-statistics"/> <version value="3.0.2"/> <code value="sum"/> <display value="Sum"/> </contains> <contains> <system value="http://hl7.org/fhir/observation-statistics"/> <version value="3.0.2"/> <code value="variance"/> <display value="Variance"/> </contains> <contains> <system value="http://hl7.org/fhir/observation-statistics"/> <version value="3.0.2"/> <code value="20-percent"/> <display value="20th Percentile"/> </contains> <contains> <system value="http://hl7.org/fhir/observation-statistics"/> <version value="3.0.2"/> <code value="80-percent"/> <display value="80th Percentile"/> </contains> <contains> <system value="http://hl7.org/fhir/observation-statistics"/> <version value="3.0.2"/> <code value="4-lower"/> <display value="Lower Quartile"/> </contains> <contains> <system value="http://hl7.org/fhir/observation-statistics"/> <version value="3.0.2"/> <code value="4-upper"/> <display value="Upper Quartile"/> </contains> <contains> <system value="http://hl7.org/fhir/observation-statistics"/> <version value="3.0.2"/> <code value="4-dev"/> <display value="Quartile Deviation"/> </contains> <contains> <system value="http://hl7.org/fhir/observation-statistics"/> <version value="3.0.2"/> <code value="5-1"/> <display value="1st Quintile"/> </contains> <contains> <system value="http://hl7.org/fhir/observation-statistics"/> <version value="3.0.2"/> <code value="5-2"/> <display value="2nd Quintile"/> </contains> <contains> <system value="http://hl7.org/fhir/observation-statistics"/> <version value="3.0.2"/> <code value="5-3"/> <display value="3rd Quintile"/> </contains> <contains> <system value="http://hl7.org/fhir/observation-statistics"/> <version value="3.0.2"/> <code value="5-4"/> <display value="4th Quintile"/> </contains> <contains> <system value="http://hl7.org/fhir/observation-statistics"/> <version value="3.0.2"/> <code value="skew"/> <display value="Skew"/> </contains> <contains> <system value="http://hl7.org/fhir/observation-statistics"/> <version value="3.0.2"/> <code value="kurtosis"/> <display value="Kurtosis"/> </contains> <contains> <system value="http://hl7.org/fhir/observation-statistics"/> <version value="3.0.2"/> <code value="regression"/> <display value="Regression"/> </contains> </expansion> </ValueSet>

Generated Narrative: ValueSet R3-observation-statistics-for-R4

This value set expansion contains 21 concepts.

Code	System	Display	Definition
average	http://hl7.org/fhir/observation-statistics	Average	The mean of N measurements over the stated period
maximum	http://hl7.org/fhir/observation-statistics	Maximum	The maximum value of N measurements over the stated period
minimum	http://hl7.org/fhir/observation-statistics	Minimum	The minimum value of N measurements over the stated period
count	http://hl7.org/fhir/observation-statistics	Count	The [number] of valid measurements over the stated period that contributed to the other statistical outputs
totalcount	http://hl7.org/fhir/observation-statistics	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	http://hl7.org/fhir/observation-statistics	Median	The median of N measurements over the stated period
std-dev	http://hl7.org/fhir/observation-statistics	Standard Deviation	The standard deviation of N measurements over the stated period
sum	http://hl7.org/fhir/observation-statistics	Sum	The sum of N measurements over the stated period
variance	http://hl7.org/fhir/observation-statistics	Variance	The variance of N measurements over the stated period
20-percent	http://hl7.org/fhir/observation-statistics	20th Percentile	The 20th Percentile of N measurements over the stated period
80-percent	http://hl7.org/fhir/observation-statistics	80th Percentile	The 80th Percentile of N measurements over the stated period
4-lower	http://hl7.org/fhir/observation-statistics	Lower Quartile	The lower Quartile Boundary of N measurements over the stated period
4-upper	http://hl7.org/fhir/observation-statistics	Upper Quartile	The upper Quartile Boundary of N measurements over the stated period
4-dev	http://hl7.org/fhir/observation-statistics	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	http://hl7.org/fhir/observation-statistics	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	http://hl7.org/fhir/observation-statistics	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 population
5-3	http://hl7.org/fhir/observation-statistics	3rd Quintile	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
5-4	http://hl7.org/fhir/observation-statistics	4th Quintile	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
skew	http://hl7.org/fhir/observation-statistics	Skew	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
kurtosis	http://hl7.org/fhir/observation-statistics	Kurtosis	Kurtosis is a measure of the "tailedness" of the probability distribution of a real-valued random variable. Source: Wikipedia
regression	http://hl7.org/fhir/observation-statistics	Regression	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 This Statistic code will return both a gradient and an intercept value.