Evidence Based Medicine on FHIR Implementation Guide, published by HL7 International / Clinical Decision Support. This guide is not an authorized publication; it is the continuous build for version 1.0.0-ballot3 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/ebm/ and changes regularly. See the Directory of published versions
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version: 11; Last updated: 2026-01-07 11:28:51+0000; Language: en
Profile: NetEffectContribution
url: https://fevir.net/resources/Evidence/179591
identifier: FEvIR Object Identifier/179591
name: NetEffectContribution_for_ComparativeEvidence_Bypass_surgery_effects_on_Additional_GI_surgical_procedure_in_JAMA_2018_Norwegian_cohort_study
title: NetEffectContribution for ComparativeEvidence: Bypass surgery effects on Additional GI surgical procedure in JAMA 2018 Norwegian cohort study
citeAs:
NetEffectContribution for ComparativeEvidence: Bypass surgery effects on Additional GI surgical procedure in JAMA 2018 Norwegian cohort study [Database Entry: FHIR Evidence Resource]. Contributors: Computable Publishing: Net Effect Generator, Brian S. Alper, MD, MSPH [Authors/Creators]. In: Fast Evidence Interoperability Resources (FEvIR) Platform, FOI 179591. Revised 2026-01-07. Available at: https://fevir.net/resources/Evidence/179591. Computable resource at: https://fevir.net/resources/Evidence/179591#json.
status: Active
author: Computable Publishing: Net Effect Generator: , Brian S. Alper, MD, MSPH:
publisher: Computable Publishing LLC
contact: support@computablepublishing.com
copyright:
https://creativecommons.org/licenses/by-nc-sa/4.0/
description:
This Evidence Resource is referenced in an example for the EBMonFHIR Implementation Guide.
variableDefinition
description:
Cohort study with baseline data of exposures from November 2005 through July 2010 and follow-up data from 2006 until death or through December 2015 at a tertiary care outpatient center, Vestfold Hospital Trust, Norway. Consecutive treatment-seeking adult patients (n = 2109) with severe obesity assessed (221 patients excluded and 1888 patients included).
variableRole: Population
observed: StudyGroup: Severely Obese Adults 2018 Norwegian Cohort
variableDefinition
description:
bariatric surgery vs. specialized medical treatment without bariatric surgery
variableRole: Exposure
comparatorCategory: no bariatric surgery
observed: GroupAssignment: Bariatric Surgery vs. no bariatric surgery
variableDefinition
description:
Additional GI surgical procedure
variableRole: Outcome
variableDefinition
RelativeOutcomeImportance: Outcome Importance Rating of DichotomousIntendedOutcome: Additional gastrointestinal surgical procedure for StudyEligibilityCriteria: Eligibility Criteria for Bariatric Surgery Randomized Trial (Diabetes Surgery Study)
variableRole: Covariate
roleSubtype: Relative Value Multiplier
observed: Relative Importance Multiplier
statistic
statisticType: risk difference
quantity: -387.5
AttributeEstimates
Type Level Range confidence interval 0.95 -542.5--271.25 ModelCharacteristics
Code Net effect contribution analysis