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Clinical Decision Support Work Group  Maturity Level: 1  Trial Use  Use Context: Country: World, Not yet ready for Production use 
Official URL: http://hl7.org/fhir/ValueSet/statistictype

Version: 5.0.0cibuild  
draft as of 20210805  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
http://terminology.hl7.org/CodeSystem/statistictype
This expansion generated 25 Mar 2023
This value set contains 22 concepts
Expansion based on StatisticStatisticType v0.1.0 (CodeSystem)
Code  System  Display  Definition 
absoluteMedianDiff  http://terminology.hl7.org/CodeSystem/statistictype  Absolute Median Difference  Computed by forming the difference between two medians. 
C25463  http://terminology.hl7.org/CodeSystem/statistictype  Count  The number or amount of something. 
0000301  http://terminology.hl7.org/CodeSystem/statistictype  Covariance  The strength of correlation between a set (2 or more) of random variables. The covariance is obtained by forming: cov(x,y)=e([xe(x)][ye(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  http://terminology.hl7.org/CodeSystem/statistictype  Predicted Risk  A special use case where the proportion is derived from a formula rather than derived from summary evidence. 
descriptive  http://terminology.hl7.org/CodeSystem/statistictype  Descriptive  Descriptive measure reported as narrative. 
C93150  http://terminology.hl7.org/CodeSystem/statistictype  Hazard 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  http://terminology.hl7.org/CodeSystem/statistictype  Incidence  The relative frequency of occurrence of something. 
rateratio  http://terminology.hl7.org/CodeSystem/statistictype  Incidence Rate Ratio  A type of relative effect estimate that compares rates over time (eg events per personyears). 
C25564  http://terminology.hl7.org/CodeSystem/statistictype  Maximum  The largest possible quantity or degree. 
C53319  http://terminology.hl7.org/CodeSystem/statistictype  Mean  The sum of a set of values divided by the number of values in the set. 
0000457  http://terminology.hl7.org/CodeSystem/statistictype  Mean Difference  The mean difference, or difference in means, measures the absolute difference between the mean value in two different groups. 
C28007  http://terminology.hl7.org/CodeSystem/statistictype  Median  The value which has an equal number of values greater and less than it. 
C25570  http://terminology.hl7.org/CodeSystem/statistictype  Minimum  The smallest possible quantity. 
C16932  http://terminology.hl7.org/CodeSystem/statistictype  Odds 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 samplebased estimate of that ratio. 
C65172  http://terminology.hl7.org/CodeSystem/statistictype  Pearson 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  http://terminology.hl7.org/CodeSystem/statistictype  Prevalence  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  http://terminology.hl7.org/CodeSystem/statistictype  Proportion  Quotient of quantities of the same kind for different components within the same system. [Use for univariate outcomes within an individual.]. 
0000565  http://terminology.hl7.org/CodeSystem/statistictype  Regression 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  http://terminology.hl7.org/CodeSystem/statistictype  Relative 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  http://terminology.hl7.org/CodeSystem/statistictype  Risk 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  http://terminology.hl7.org/CodeSystem/statistictype  Spearman RankOrder Correlation  A distributionfree 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  http://terminology.hl7.org/CodeSystem/statistictype  Standardized Mean Difference  Computed by forming the difference between two means, divided by an estimate of the withingroup 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:
Lvl  A 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 
Source  The source of the definition of the code (when the value set draws in codes defined elsewhere) 
Code  The code (used as the code in the resource instance). If the code is in italics, this indicates that the code is not selectable ('Abstract') 
Display  The 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 
Definition  An explanation of the meaning of the concept 
Comments  Additional notes about how to use the code 