This page is part of the Evidence Based Medicine on FHIR Implementation Guide (v1.0.0-ballot: STU1 Ballot 1) based on FHIR (HL7® FHIR® Standard) v5.0.0. No current official version has been published yet. For a full list of available versions, see the Directory of published versions

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Extension: CombinationMethod

Official URL: http://hl7.org/fhir/uv/ebm/StructureDefinition/combination-method				Version: 1.0.0-ballot
Standards status: Draft			Maturity Level: 1	Computable Name: CombinationMethod

Used to specify how two or more characteristics are combined.

Context of Use

This extension may be used on the following element(s):

• Element ID Group

Usage info

Usage:

• Use this Extension: GroupR6
• Examples for this Extension: COVID_19PneumoniaHospitalizedAdult, CohortDefinition_Cancer_of_any_kind_except_basal_cell_skin_cancer_or_cancer_in_situ_unless_documented_to_be_disease_free_for_five_years, CohortDefinition_Cardiovascular_event, StudyEligibilityCriteria_Eligibility_Criteria_for_Bariatric_Surgery_Randomized_Trial_Diabetes_Surgery_Study... Show 38 more, StudyEligibilityCriteria_Obese_patients_18_years_old, Bariatric_Surgery_RYGB_VSG_LAGB_BPD, ComparatorGroup_Obese_patients_18_years_old_without_bariatric_surgery, StudyEligibilityCriteria_Eligibility_Criteria_for_DIBASY_Trial, OutcomeDefinition_American_Diabetes_Association_composite_triple_end_point_for_metabolic_control, ExposureGroup_JAMA_2018_Norwegian_cohort_study_Surgery_cohort, ComparatorGroup_JAMA_2018_Norwegian_cohort_study_Control_cohort, OutcomeDefinition_Nonfatal_myocardial_infarction_or_stroke, CohortDefinition_Nonfatal_myocardial_infarction, CohortDefinition_Nonfatal_stroke, OutcomeDefinition_New_onset_depression, OutcomeDefinition_Diabetes_in_remission, MetaanalysisOutcomeDefinition_Mean_difference_in_HbA1c_between_Surgery_and_Medical_Lifestyle_groups_at_end_of_follow_up, MetaanalysisEligibilityCriteria_Mean_difference_in_HbA1c_effect_of_bariatric_surgery_in_type_2_diabetes_and_elevated_BMI_in_2016_meta_analysis, Severely_Obese_Adults_2018_Norwegian_Cohort, CohortDefinition_Severe_obesity, CohortDefinition_BMI_35_and_at_least_1_obesity_related_comorbidity, CohortDefinition_BMI_criteria_for_ADA_surgery_recommendation, CohortDefinition_Proxy_criteria_for_surgical_candidates, CohortDefinition_BMI_37_5_kg_m2_in_Asian_Americans, CohortDefinition_BMI_35_39_9_in_persons_who_do_not_achieve_durable_weight_loss_and_improvement_in_comorbidities_without_surgery, CohortDefinition_BMI_32_5_37_4_in_Asian_Americans_who_do_not_achieve_durable_weight_loss_and_improvement_in_comorbidities_without_surgery, Bariatric_Surgery_Eligibility_Group_ADA_Recommendation_8_17, CohortDefinition_Lower_BMI_criteria_for_ADA_surgery_consideration, CohortDefinition_BMI_30_34_9_in_persons_who_do_not_achieve_durable_weight_loss_and_improvement_in_comorbidities_without_surgery, CohortDefinition_BMI_27_5_32_4_in_Asian_Americans_who_do_not_achieve_durable_weight_loss_and_improvement_in_comorbidities_without_surgery, EvidenceReportSubject_Clinical_Outcomes_for_Effects_of_Bariatric_Surgery, SearchStrategy_PubMed_and_Embase_search_for_van_Veldhuisen_2022_systematic_review, SystematicReviewEligibilityCriteria_ADT_and_Docetaxel_vs_ADT_alone_for_metastatic_hormone_naive_prostate_cancer, ComparativeEvidenceReportSubject_Association_of_Bariatric_Surgery_vs_Medical_Obesity_Treatment_With_Long_term_Medical_Complications_and_Obesity_Related_Comorbidities_2018_Norwegian_Cohort, ComparatorDefinition_Usual_care_pharmacologic_thromboprophylaxis, ExposureDefinition_Therapeutic_dose_anticoagulation_with_heparin, CohortDefinition_Heart_failure_based_on_Phenotypes, CohortDefinition_At_least_2_risk_factors_for_stroke, Bariatric_Surgery_Eligibility_Group_ADA_Recommendation_8_16, Type_2_diabetes_and_elevated_BMI_in_2016_meta_analysis, Patients_who_are_hospitalized_for_COVID_19_and_who_are_not_critically_ill and Participants_in_Anticoagulation_for_COVID_19_Combined_ATTACC_ACTIV_4a_and_REMAP_CAP_RCT_hospitalized_not_critically_ill

Formal Views of Extension Content

Description of Profiles, Differentials, Snapshots, and how the XML and JSON presentations work.

 

Other representations of profile: CSV, Excel, Schematron

Constraints

Id	Grade	Path(s)	Details	Requirements
ele-1	error	**ALL** elements	All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count())
ext-1	error	**ALL** extensions	Must have either extensions or value[x], not both : extension.exists() != value.exists()