Evidence-example-statistic-model-include-if

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Example Evidence/example-statistic-model-include-if (Narrative)

Clinical Decision Support Work Group

Maturity Level: N/A

Standards Status: Informative

Compartments: No defined compartments

This is the narrative for the resource. See also the XML, JSON or Turtle format. This example conforms to the profile Evidence.

Generated Narrative: Evidence example-statistic-model-include-if

version: 9; Last updated: 2025-03-10T14:59:32.227Z

Profile: http://hl7.org/fhir/uv/ebm/StructureDefinition/statistic-model

StructureDefinition Work Group: cds

url: https://fevir.net/resources/Evidence/346428

identifier: FEvIR Object Identifier/https://fevir.net/FOI/346428

title: Example of statistical analysis plan with different statistical test if non-normal distribution

status: active

author: Brian S. Alper, MD, MSPH:

publisher: HL7 International / Clinical Decision Support

contact: http://www.hl7.org/Special/committees/dss

copyright:

https://creativecommons.org/licenses/by-nc-sa/4.0/

description:

This example uses the StatisticModelIncludeIf extension to represent the model characteristic of Welch's 2-sample t-test if the data is consistent with a normal distribution (based on Shapiro-Wilk test with p-value >= 0.05) and a Wilcoxon Mann-Whitney test if not.

variableDefinition
description:

Adults with hypertension

variableRole: population

variableDefinition
description:

Reversitol vs. Placebo

variableRole: exposure

variableDefinition
description:

Change in systolic blood pressure from baseline to 3 months

variableRole: outcome

studyDesign: randomized assignment

statistic
statisticType: difference in means
modelCharacteristic
Statistic Model Include If

attribute: data distribution

value: normal distribution (Shapiro-Wilk test with p-value >= 0.05)
code: Welch's 2-sample t-test
intended: true
modelCharacteristic
Statistic Model Include If

attribute: data distribution

value: not consistent with normal distribution (Shapiro-Wilk test with p-value < 0.05)
code: Wilcoxon Mann-Whitney test
intended: true

Usage note: every effort has been made to ensure that the examples are correct and useful, but they are not a normative part of the specification.