Evaluation of confounding in epidemiologic studies assessing alcohol consumption on the risk of ischemic heart disease
Wallach JD, Serghiou S, Chu L, Egilman AC, Vasiliou V, Ross JS, Ioannidis JPA. Evaluation of confounding in epidemiologic studies assessing alcohol consumption on the risk of ischemic heart disease. BMC Medical Research Methodology 2020, 20: 64. PMID: 32171256, PMCID: PMC7071725, DOI: 10.1186/s12874-020-0914-6.Peer-Reviewed Original ResearchConceptsIschemic heart disease riskHeart disease riskObservational studyImpact of alcoholPotential confoundersHeart diseaseDisease riskMultivariate modelIschemic heart diseaseResidual confoundingDisease relationshipsEpidemiologic studiesAlcohol consumptionConfoundersMultivariate analysisLack of consensusIndividual studiesStratification variablesDiseaseRiskSame exposureConfoundingDifferent studiesStudy findingsDifferent investigatorsVibration of effects in epidemiologic studies of alcohol consumption and breast cancer risk
Chu L, Ioannidis JPA, Egilman AC, Vasiliou V, Ross JS, Wallach JD. Vibration of effects in epidemiologic studies of alcohol consumption and breast cancer risk. International Journal Of Epidemiology 2020, 49: 608-618. PMID: 31967637, PMCID: PMC7266551, DOI: 10.1093/ije/dyz271.Peer-Reviewed Original ResearchConceptsObservational studyRelative effect estimatesImpact of alcoholEffect estimatesExposure definitionAlcohol-breast cancer relationshipDifferent exposure definitionsBreast cancer riskVibration of effectsRelative risk estimatesMost observational studiesAdjustment covariatesCancer relationshipEligible studiesBreast cancerStudy populationEpidemiologic studiesCancer riskSmaller effect estimatesAlcohol consumptionRisk estimatesContrast levelsSame associationStability of findingsOne-third