{
"description": "effect estimate for bariatric surgery on all-cause mortality pooled hazard ratio (HR) 0.55 (95% confidence interval 0.49 to 0.62; P < 0.001 vs. controls) in meta-analysis of 21 cohort studies with 133,524 patients after bariatric surgery and 263,478 obese controls",
"_filename": "example/Evidence-49328.json",
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"statistic": [ {
"note": [ {
"text": "heterogeneity: Tau2 = 0.06; Chi2 = 105.14; df = 23 (P < 0.00001); I2 = 78%"
}, {
"text": "test for overall effect z = 9.41 (p < 0.00001)"
} ],
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},
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"numberOfParticipants": 397002
},
"description": "pooled hazard ratio (HR) 0.55 (95% confidence interval 0.49 to 0.62; P < 0.001 vs. controls) in meta-analysis of 21 cohort studies with 133,524 patients after bariatric surgery and 263,478 obese controls",
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"userSelected": true
} ]
},
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"system": "http://terminology.hl7.org/CodeSystem/attribute-estimate-type",
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} ]
},
"level": 0.95,
"range": {
"low": {
"value": 0.49
},
"high": {
"value": 0.62
}
},
"description": "95% confidence interval 0.49 to 0.62"
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"display": "Defined in text"
} ]
},
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},
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},
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},
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} ]
},
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},
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},
"quantity": {
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"value": 78,
"system": "http://unitsofmeasure.org"
},
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} ],
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"code": {
"text": "Hazard ratios were log transformed, and the CI was converted to standard error = (upper limit − lower limit)/3.92 for 95% CI. In random effect models (DerSimonian and Laird), we analysed adjusted HR to generate pooled HRs for the association between bariatric surgery for outcome in comparison with controls. The pooled HRs were calculated using inverse-variance weighted averaging and were depicted in forest plots.",
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}
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"display": "Meta-analysis"
} ]
}
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"code": "effectsRandom",
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}
} ]
} ],
"date": "2022-09-19T21:27:50.801Z",
"meta": {
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"versionId": "25",
"lastUpdated": "2023-12-08T16:33:14.612Z"
},
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"name": "AllCauseMortality2022metaAnalysis",
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"copyright": "https://creativecommons.org/licenses/by-nc-sa/4.0/",
"type": null,
"experimental": null,
"resourceType": "Evidence",
"variableDefinition": [ {
"note": [ {
"text": "population"
} ],
"intended": {
"type": "Group",
"display": "StudyEligibilityCriteria: Obese patients ≥ 18 years old",
"reference": "Group/171819"
},
"extension": [ {
"url": "http://hl7.org/fhir/uv/ebm/StructureDefinition/variable-definition-variable-role-code",
"valueCode": "population"
} ],
"description": "obese, adult (age ≥18 years old) patients *NOTE: note.text is used artificially to support the EBMonFHIR Implementation Guide and the following content would more properly be found in a note.text element:* Studies were considered eligible if they were designed to study outcomes in obese patients who underwent a weight-loss surgical intervention in comparison with an age, sex, and BMI matched control group who did not undergo a weight-loss surgical intervention. We searched for randomized controlled trials, prospective or retrospective longitudinal cohort studies, and case–control studies. For the control group, all non-surgical treatment options for obesity (e.g. intensive lifestyle intervention, standard of care, or no specific therapy) were accepted. Studies were excluded if (i) patients were not matched for age, sex, and BMI; (ii) the presence of one or more outcome parameters of interest (e.g. HF, AF, coronary artery disease) was required for inclusion; or (iii) if study groups were not representative in relation to the general population of patients with obesity (e.g. patients could only be included in the presence of a specific comorbidity, for instance, end-stage renal disease). The third criterium did not apply to Type 2 diabetes, thus studies that only included patients with Type 2 diabetes could be eligible for inclusion.",
"variableRole": {
"text": "Use extension:variableRoleCode instead.",
"coding": [ {
"code": "population",
"system": "http://terminology.hl7.org/CodeSystem/variable-role",
"display": "population"
} ]
}
}, {
"note": [ {
"text": "exposure"
} ],
"intended": {
"type": "EvidenceVariable",
"display": "GroupAssignment: Bariatric Surgery vs. no bariatric surgery",
"reference": "EvidenceVariable/172427"
},
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"url": "http://hl7.org/fhir/uv/ebm/StructureDefinition/variable-definition-variable-role-code",
"valueCode": "exposure"
}, {
"url": "http://hl7.org/fhir/uv/ebm/StructureDefinition/variable-definition-comparator-category",
"valueString": "no bariatric surgery"
} ],
"description": "comparison groups of bariatric surgery vs. no bariatric surgery *NOTE: note.text is used artificially to support the EBMonFHIR Implementation Guide and the following content would more properly be found in a note.text element:* As the control group (observed reference exposure) was defined differently in each study, the intended reference exposure is described as the absence of the intended exposure (Bariatric Surgery).",
"variableRole": {
"text": "Use extension:variableRoleCode instead.",
"coding": [ {
"code": "exposure",
"system": "http://terminology.hl7.org/CodeSystem/variable-role",
"display": "exposure"
} ]
}
}, {
"note": [ {
"text": "outcome"
} ],
"intended": {
"type": "EvidenceVariable",
"display": "OutcomeVariable: All-cause mortality",
"reference": "EvidenceVariable/49217"
},
"observed": {
"display": "We searched for randomized controlled trials, prospective or retrospective longitudinal cohort studies, and case–control studies. For the control group, all non-surgical treatment options for obesity (e.g. intensive lifestyle intervention, standard of care, or no specific therapy) were accepted. Studies were excluded if (i) patients were not matched for age, sex, and BMI; (ii) the presence of one or more outcome parameters of interest (e.g. HF, AF, coronary artery disease) was required for inclusion; or (iii) if study groups were not representative in relation to the general population of patients with obesity (e.g. patients could only be included in the presence of a specific comorbidity, for instance, end-stage renal disease). The third criterium did not apply to Type 2 diabetes, thus studies that only included patients with Type 2 diabetes could be eligible for inclusion."
},
"extension": [ {
"url": "http://hl7.org/fhir/uv/ebm/StructureDefinition/variable-definition-variable-role-code",
"valueCode": "outcome"
} ],
"description": "All-cause mortality *NOTE: note.text is used artificially to support the EBMonFHIR Implementation Guide and the following content would more properly be found in a note.text element:* The observed element can reference an EvidenceVariable Resource that defines the outcome measured through structured characteristics. For example, “Mean difference in HbA1c at 12 months” or “Mean difference in HbA1c at end of study”. The structured characteristics can be references to the Evidence instances for each of the included studies, in which case this is a direct link to the dataset used for analysis. The intended element can reference an EvidenceVariable Resource that expresses the outcome intended for evidence application through structured characteristics. The structured characteristics could be used to express the SR eligibility criteria for study outcomes (as a subset of eligibility criteria for studies).",
"variableRole": {
"text": "Use extension:variableRoleCode instead.",
"coding": [ {
"code": "measuredVariable",
"system": "http://terminology.hl7.org/CodeSystem/variable-role",
"display": "measured variable"
} ]
}
} ],
"title": "ComparativeEvidence: All-cause mortality effect of bariatric surgery in 2022 meta-analysis",
"package_version": "1.0.0-ballot",
"author": [ {
"name": "Brian S. Alper"
} ],
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"display": "summary data meta-analysis",
"version": "3.1.0"
} ]
},
"extension": [ {
"url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
"valueCode": "cds"
} ],
"status": "active",
"id": "623ea106-2c14-48a0-a17a-046f5434fff6",
"kind": null,
"url": "https://fevir.net/resources/Evidence/49328",
"identifier": [ {
"type": {
"text": "FEvIR Object Identifier",
"coding": [ {
"code": "ACSN",
"system": "http://terminology.hl7.org/CodeSystem/v2-0203",
"display": "Accession ID"
} ]
},
"value": "49328",
"system": "https://fevir.net",
"assigner": {
"display": "Computable Publishing LLC"
}
} ],
"version": "1.0.0-ballot",
"relatedArtifact": [ {
"type": "derived-from",
"label": "data source",
"citation": "Bariatric surgery and cardiovascular disease: a systematic review and meta-analysis [Journal Article]. Contributors: van Veldhuisen SL, Gorter TM, van Woerden G, de Boer RA, Rienstra M, Hazebroek EJ, van Veldhuisen DJ. In: European heart journal, PMID 35243488. Published March 04, 2022. Available at: https://pubmed.ncbi.nlm.nih.gov/35243488/.",
"document": {
"url": "https://academic.oup.com/eurheartj/article/43/20/1955/6542137"
}
}, {
"type": "supported-with",
"display": "Citation Resource for 2022 Systematic Review of bariatric surgery mortality effect - PMID 35243488",
"classifier": [ {
"text": "Citation Resource for the original article"
} ],
"resourceReference": {
"type": "Citation",
"display": "StudyCitation: 2022 Systematic Review of bariatric surgery mortality effect 35243488",
"reference": "Citation/33400"
}
}, {
"type": "cite-as",
"citation": "ComparativeEvidence: All-cause mortality effect of bariatric surgery in 2022 meta-analysis [Evidence]. Contributors: Brian S. Alper [Authors/Creators]. In: Fast Evidence Interoperability Resources (FEvIR) Platform, FOI 49328. Revised 2022-09-19. Available at: https://fevir.net/resources/Evidence/49328. Computable resource at: https://fevir.net/resources/Evidence/49328."
} ],
"studyDesign": [ {
"coding": [ {
"code": "SEVCO:01002",
"system": "http://hl7.org/fhir/study-design",
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"version": "5.0.0-cibuild"
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}, {
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}, {
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"assertion": "The present systematic review and meta-analysis suggests that bariatric surgery is associated with reduced all-cause and CV mortality."
}