2022
Comparison of Clinical Study Results Reported in medRxiv Preprints vs Peer-reviewed Journal Articles
Janda G, Khetpal V, Shi X, Ross J, Wallach J. Comparison of Clinical Study Results Reported in medRxiv Preprints vs Peer-reviewed Journal Articles. JAMA Network Open 2022, 5: e2245847. PMID: 36484989, PMCID: PMC9856222, DOI: 10.1001/jamanetworkopen.2022.45847.Peer-Reviewed Original ResearchConceptsPrimary end pointPrimary end point resultsPeer-reviewed journalsClinical studiesEnd pointClinical trialsObservational studyStudy characteristicsEnd point resultsClinical study resultsMost clinical studiesCross-sectional studyHealth-related outcomesSample sizeMAIN OUTCOMEPeer-reviewed publicationsMedRxivEffect estimatesStudy interpretationDiscordant pairsCOVID-19TrialsVibration of effect in more than 16 000 pooled analyses of individual participant data from 12 randomised controlled trials comparing canagliflozin and placebo for type 2 diabetes mellitus: multiverse analysis
Gouraud H, Wallach J, Boussageon R, Ross J, Naudet F. Vibration of effect in more than 16 000 pooled analyses of individual participant data from 12 randomised controlled trials comparing canagliflozin and placebo for type 2 diabetes mellitus: multiverse analysis. BMJ Medicine 2022, 1: e000154. PMID: 36936564, PMCID: PMC9978683, DOI: 10.1136/bmjmed-2022-000154.Peer-Reviewed Original ResearchMajor adverse cardiovascular eventsType 2 diabetes mellitusIndividual participant dataAdverse cardiovascular eventsSerious adverse eventsPooled analysisCanagliflozin treatmentFirst centileCardiovascular eventsHazard ratioAdverse eventsDiabetes mellitusParticipant dataEffect estimatesFavour of placeboSerum glycated hemoglobinIndividual patient dataVibration of effectsWeek 12Glycated hemoglobinPlaceboCentileCanagliflozinPatient dataTrials
2020
Vibration 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