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4.4.1.88 ValueSet http://hl7.org/fhir/ValueSet/statistic-type

Clinical Decision Support icon Work Group Maturity Level: 1Trial Use Use Context: Country: World, Not yet ready for Production use
Official URL: http://hl7.org/fhir/ValueSet/statistic-type Version: 6.0.0-cibuild
draft as of 2021-08-05 Computable Name: StatisticType
Flags: Experimental, Immutable OID: 2.16.840.1.113883.4.642.3.3044

This value set is used in the following places:

The type of a statistic, e.g. relative risk or mean


 

This expansion generated 30 May 2024


Expansion based on codesystem StatisticStatisticType v1.0.0 (CodeSystem) icon

This value set contains 22 concepts.

CodeSystemDisplayDefinition
  absolute-MedianDiff iconhttp://terminology.hl7.org/CodeSystem/statistic-typeAbsolute Median Difference

Computed by forming the difference between two medians.

  C25463 iconhttp://terminology.hl7.org/CodeSystem/statistic-typeCount

The number or amount of something.

  0000301 iconhttp://terminology.hl7.org/CodeSystem/statistic-typeCovariance

The strength of correlation between a set (2 or more) of random variables. The covariance is obtained by forming: cov(x,y)=e([x-e(x)][y-e(y)] where e(x), e(y) is the expected value (mean) of variable x and y respectively. Covariance is symmetric so cov(x,y)=cov(y,x). The covariance is usefull when looking at the variance of the sum of the 2 random variables since: var(x+y) = var(x) +var(y) +2cov(x,y) the covariance cov(x,y) is used to obtain the coefficient of correlation cor(x,y) by normalizing (dividing) cov(x,y) but the product of the standard deviations of x and y.

  predictedRisk iconhttp://terminology.hl7.org/CodeSystem/statistic-typePredicted Risk

A special use case where the proportion is derived from a formula rather than derived from summary evidence.

  descriptive iconhttp://terminology.hl7.org/CodeSystem/statistic-typeDescriptive

Descriptive measure reported as narrative.

  C93150 iconhttp://terminology.hl7.org/CodeSystem/statistic-typeHazard Ratio

A measure of how often a particular event happens in one group compared to how often it happens in another group, over time. In cancer research, hazard ratios are often used in clinical trials to measure survival at any point in time in a group of patients who have been given a specific treatment compared to a control group given another treatment or a placebo. A hazard ratio of one means that there is no difference in survival between the two groups. A hazard ratio of greater than one or less than one means that survival was better in one of the groups.

  C16726 iconhttp://terminology.hl7.org/CodeSystem/statistic-typeIncidence

The relative frequency of occurrence of something.

  rate-ratio iconhttp://terminology.hl7.org/CodeSystem/statistic-typeIncidence Rate Ratio

A type of relative effect estimate that compares rates over time (eg events per person-years).

  C25564 iconhttp://terminology.hl7.org/CodeSystem/statistic-typeMaximum

The largest possible quantity or degree.

  C53319 iconhttp://terminology.hl7.org/CodeSystem/statistic-typeMean

The sum of a set of values divided by the number of values in the set.

  0000457 iconhttp://terminology.hl7.org/CodeSystem/statistic-typeMean Difference

The mean difference, or difference in means, measures the absolute difference between the mean value in two different groups.

  C28007 iconhttp://terminology.hl7.org/CodeSystem/statistic-typeMedian

The value which has an equal number of values greater and less than it.

  C25570 iconhttp://terminology.hl7.org/CodeSystem/statistic-typeMinimum

The smallest possible quantity.

  C16932 iconhttp://terminology.hl7.org/CodeSystem/statistic-typeOdds Ratio

The ratio of the odds of an event occurring in one group to the odds of it occurring in another group, or to a sample-based estimate of that ratio.

  C65172 iconhttp://terminology.hl7.org/CodeSystem/statistic-typePearson Correlation Coefficient

A measure of the correlation of two variables X and Y measured on the same object or organism, that is, a measure of the tendency of the variables to increase or decrease together. It is defined as the sum of the products of the standard scores of the two measures divided by the degrees of freedom.

  C17010 iconhttp://terminology.hl7.org/CodeSystem/statistic-typePrevalence

The ratio (for a given time period) of the number of occurrences of a disease or event to the number of units at risk in the population.

  C44256 iconhttp://terminology.hl7.org/CodeSystem/statistic-typeProportion

Quotient of quantities of the same kind for different components within the same system. [Use for univariate outcomes within an individual.].

  0000565 iconhttp://terminology.hl7.org/CodeSystem/statistic-typeRegression Coefficient

Generated by a type of data transformation called a regression, which aims to model a response variable by expression the predictor variables as part of a function where variable terms are modified by a number. A regression coefficient is one such number.

  C93152 iconhttp://terminology.hl7.org/CodeSystem/statistic-typeRelative Risk

A measure of the risk of a certain event happening in one group compared to the risk of the same event happening in another group. In cancer research, risk ratios are used in prospective (forward looking) studies, such as cohort studies and clinical trials. A risk ratio of one means there is no difference between two groups in terms of their risk of cancer, based on whether or not they were exposed to a certain substance or factor, or how they responded to two treatments being compared. A risk ratio of greater than one or of less than one usually means that being exposed to a certain substance or factor either increases (risk ratio greater than one) or decreases (risk ratio less than one) the risk of cancer, or that the treatments being compared do not have the same effects.

  0000424 iconhttp://terminology.hl7.org/CodeSystem/statistic-typeRisk Difference

Difference between the observed risks (proportions of individuals with the outcome of interest) in the two groups. The risk difference is straightforward to interpret: it describes the actual difference in the observed risk of events between experimental and control interventions.

  C65171 iconhttp://terminology.hl7.org/CodeSystem/statistic-typeSpearman Rank-Order Correlation

A distribution-free analog of correlation analysis. Like regression, it can be applied to compare two independent random variables, each at several levels (which may be discrete or continuous). Unlike regression, Spearman's rank correlation works on ranked (relative) data, rather than directly on the data itself.

  0000100 iconhttp://terminology.hl7.org/CodeSystem/statistic-typeStandardized Mean Difference

Computed by forming the difference between two means, divided by an estimate of the within-group standard deviation. It is used to provide an estimatation of the effect size between two treatments when the predictor (independent variable) is categorical and the response(dependent) variable is continuous.

 

See the full registry of value sets defined as part of FHIR.


Explanation of the columns that may appear on this page:

LvlA few code lists that FHIR defines are hierarchical - each code is assigned a level. For value sets, levels are mostly used to organize codes for user convenience, but may follow code system hierarchy - see Code System for further information
SourceThe source of the definition of the code (when the value set draws in codes defined elsewhere)
CodeThe code (used as the code in the resource instance). If the code is in italics, this indicates that the code is not selectable ('Abstract')
DisplayThe display (used in the display element of a Coding). If there is no display, implementers should not simply display the code, but map the concept into their application
DefinitionAn explanation of the meaning of the concept
CommentsAdditional notes about how to use the code