FHIR Cross-Version Extensions package for FHIR R4 from FHIR R5
0.0.1-snapshot-2 - informative International flag

FHIR Cross-Version Extensions package for FHIR R4 from FHIR R5 - Version 0.0.1-snapshot-2. See the Directory of published versions

CodeSystem: Statistics Code

Official URL: http://hl7.org/fhir/observation-statistics Version: 5.0.0
Standards status: Informative Maturity Level: 0 Responsible: Orders and Observations Computable Name: StatisticsCode

The statistical operation parameter -“statistic” codes.

This Code system is referenced in the content logical definition of the following value sets:

  • This CodeSystem is not used here; it may be used elsewhere (e.g. specifications and/or implementations that use this content)

This case-sensitive code system http://hl7.org/fhir/observation-statistics defines the following codes:

CodeDisplayDefinition
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 population.

5-3 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 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 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 Kurtosis

Kurtosis is a measure of the "tailedness" of the probability distribution of a real-valued random variable. Source: Wikipedia.

regression 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.