2022
Comparative Safety and Effectiveness of Biologic Therapy for Crohn’s Disease: A CA-IBD Cohort Study
Singh S, Kim J, Luo J, Paul P, Rudrapatna V, Park S, Zheng K, Syal G, Ha C, Fleshner P, McGovern D, Sauk J, Limketkai B, Dulai P, Boland B, Eisenstein S, Ramamoorthy S, Melmed G, Mahadevan U, Sandborn W, Ohno-Machado L. Comparative Safety and Effectiveness of Biologic Therapy for Crohn’s Disease: A CA-IBD Cohort Study. Clinical Gastroenterology And Hepatology 2022, 21: 2359-2369.e5. PMID: 36343846, DOI: 10.1016/j.cgh.2022.10.029.Peer-Reviewed Original ResearchConceptsTNF-α antagonistsRisk of hospitalizationUstekinumab-treated patientsCrohn's diseaseSerious infectionsLower riskMulticenter cohortInflammatory bowel disease-related surgeryTumor necrosis factor α antagonistsNecrosis factor α antagonistsDisease-related surgeryHigher comorbidity burdenVedolizumab-treated patientsNew biologic agentsPropensity-score matchingComorbidity burdenCause hospitalizationAdult patientsBiologic therapyCohort studyPrior hospitalizationBiologic agentsΑ antagonistsBiologic classesComparative safetyEffect of Obesity on Risk of Hospitalization, Surgery, and Serious Infection in Biologic-Treated Patients With Inflammatory Bowel Diseases: A CA-IBD Cohort Study
Gu P, Luo J, Kim J, Paul P, Limketkai B, Sauk J, Park S, Parekh N, Zheng K, Rudrapatna V, Syal G, Ha C, McGovern D, Melmed G, Fleshner P, Eisenstein S, Ramamoorthy S, Dulai P, Boland B, Grunvald E, Mahadevan U, Ohno-Machado L, Sandborn W, Singh S. Effect of Obesity on Risk of Hospitalization, Surgery, and Serious Infection in Biologic-Treated Patients With Inflammatory Bowel Diseases: A CA-IBD Cohort Study. The American Journal Of Gastroenterology 2022, 117: 1639-1647. PMID: 35973139, DOI: 10.14309/ajg.0000000000001855.Peer-Reviewed Original ResearchConceptsInflammatory bowel diseaseBiologic-treated patientsRisk of hospitalizationBody mass indexNormal body mass indexSerious infectionsBiologic agentsBowel diseaseCox proportional hazards analysisWorld Health Organization classificationEffect of obesityProportional hazards analysisElectronic health recordsCause hospitalizationVisceral obesityAdult patientsBaseline demographicsBiologic initiationBiologic therapyCohort studyEndoscopic outcomesMass indexOrganization classificationTreatment characteristicsStratified analysisSimplified Machine Learning Models Can Accurately Identify High-Need High-Cost Patients With Inflammatory Bowel Disease
Nguyen N, Patel S, Gabunilas J, Qian A, Cecil A, Jairath V, Sandborn W, Ohno-Machado L, Chen P, Singh S. Simplified Machine Learning Models Can Accurately Identify High-Need High-Cost Patients With Inflammatory Bowel Disease. Clinical And Translational Gastroenterology 2022, 13: e00507. PMID: 35905414, PMCID: PMC10476830, DOI: 10.14309/ctg.0000000000000507.Peer-Reviewed Original ResearchMeSH KeywordsAdultChronic DiseaseHospitalizationHumansInflammatory Bowel DiseasesMachine LearningRetrospective StudiesRisk FactorsConceptsInflammatory bowel diseaseUnplanned healthcare utilizationAdult patientsBowel diseaseHealthcare utilizationHealthcare costsLogistic regressionRetrospective cohort studyNationwide Readmissions DatabaseIdentification of patientsAdministrative claims dataHigh-cost patientsHNHC patientsCohort studyHospitalized patientsClaims dataHigh riskPatientsTraditional logistic regressionDerivation dataMean AUCIBDMean areaCharacteristic curveDiseaseEffectiveness and Safety of Biologic Therapy in Hispanic Vs Non-Hispanic Patients With Inflammatory Bowel Diseases: A CA-IBD Cohort Study
Nguyen N, Luo J, Paul P, Kim J, Syal G, Ha C, Rudrapatna V, Park S, Parekh N, Zheng K, Sauk J, Limketkai B, Fleshner P, Eisenstein S, Ramamoorthy S, Melmed G, Dulai P, Boland B, Mahadevan U, Sandborn W, Ohno-Machado L, McGovern D, Singh S. Effectiveness and Safety of Biologic Therapy in Hispanic Vs Non-Hispanic Patients With Inflammatory Bowel Diseases: A CA-IBD Cohort Study. Clinical Gastroenterology And Hepatology 2022, 21: 173-181.e5. PMID: 35644340, PMCID: PMC9701245, DOI: 10.1016/j.cgh.2022.05.008.Peer-Reviewed Original ResearchConceptsInflammatory bowel diseaseNon-Hispanic patientsBiologic-treated patientsHispanic patientsSerious infectionsBiologic therapyBowel diseasePropensity score-matched cohortBurden of inflammationRisk of hospitalizationHigh ratePropensity-score matchingCause hospitalizationAdult patientsBiologic initiationCohort studyBiologic agentsMedication useHigh burdenHigh riskHospitalizationPatientsSurvival analysisSurgeryAbstractTextInclusion of social determinants of health improves sepsis readmission prediction models
Amrollahi F, Shashikumar S, Meier A, Ohno-Machado L, Nemati S, Wardi G. Inclusion of social determinants of health improves sepsis readmission prediction models. Journal Of The American Medical Informatics Association 2022, 29: 1263-1270. PMID: 35511233, PMCID: PMC9196687, DOI: 10.1093/jamia/ocac060.Peer-Reviewed Original ResearchMeSH KeywordsHumansLogistic ModelsPatient ReadmissionRetrospective StudiesRisk FactorsSepsisSocial Determinants of HealthConceptsUnplanned readmissionSepsis patientsReadmission modelsClinical/laboratory featuresSocial determinantsUnplanned hospital readmissionHigh-risk patientsObjective clinical dataLow predictive valueReadmission prediction modelsSepsis readmissionsLaboratory featuresSepsis casesHospital readmissionPredictive factorsClinical dataReadmissionHigh riskPredictive valueSDH factorsMedical carePatientsDemographic featuresLarger studyProgram cohort
2020
Retrospective evaluation of whole exome and genome mutation calls in 746 cancer samples
Bailey MH, Meyerson WU, Dursi LJ, Wang LB, Dong G, Liang WW, Weerasinghe A, Li S, Li Y, Kelso S, Saksena G, Ellrott K, Wendl M, Wheeler D, Getz G, Simpson J, Gerstein M, Ding L. Retrospective evaluation of whole exome and genome mutation calls in 746 cancer samples. Nature Communications 2020, 11: 4748. PMID: 32958763, PMCID: PMC7505971, DOI: 10.1038/s41467-020-18151-y.Peer-Reviewed Original ResearchBurden and Outcomes of Fragmentation of Care in Hospitalized Patients With Inflammatory Bowel Diseases: A Nationally Representative Cohort
Nguyen N, Luo J, Ohno-Machado L, Sandborn W, Singh S. Burden and Outcomes of Fragmentation of Care in Hospitalized Patients With Inflammatory Bowel Diseases: A Nationally Representative Cohort. Inflammatory Bowel Diseases 2020, 27: 1026-1034. PMID: 32944753, PMCID: PMC8205632, DOI: 10.1093/ibd/izaa238.Peer-Reviewed Original ResearchConceptsInflammatory bowel diseaseFragmentation of careHigh riskCohort studyBowel diseaseNationwide Readmissions Database 2013Nationally Representative CohortUS cohort studyRisk of surgeryNumber of patientsRepresentative cohort studyHealth care qualityHospital mortalityHospitalized patientsCohort 2Outpatient careChronic diseasesCohort 1Representative cohortPatientsSingle episodeReadmissionHospitalizationCare qualityCare
2019
Machine Learning-Based Predictive Modeling of Surgical Intervention in Glaucoma Using Systemic Data From Electronic Health Records
Baxter S, Marks C, Kuo T, Ohno-Machado L, Weinreb R. Machine Learning-Based Predictive Modeling of Surgical Intervention in Glaucoma Using Systemic Data From Electronic Health Records. American Journal Of Ophthalmology 2019, 208: 30-40. PMID: 31323204, PMCID: PMC6888922, DOI: 10.1016/j.ajo.2019.07.005.Peer-Reviewed Original ResearchConceptsPrimary open-angle glaucomaElectronic health recordsMultivariable logistic regressionSurgical interventionGlaucoma surgeryPOAG patientsSystemic dataHigher mean systolic blood pressureMean systolic blood pressureNon-opioid analgesic medicationsLogistic regressionCertain medication classesEye-specific dataHealth recordsRisk of progressionSystolic blood pressureOpen-angle glaucomaSingle academic institutionAnti-hyperlipidemic medicationsAnalgesic medicationMedication classesProgressive diseaseBlood pressureCalcium blockersOphthalmic medications
2018
Obesity Is Independently Associated With Higher Annual Burden and Costs of Hospitalization in Patients With Inflammatory Bowel Diseases
Nguyen N, Ohno-Machado L, Sandborn W, Singh S. Obesity Is Independently Associated With Higher Annual Burden and Costs of Hospitalization in Patients With Inflammatory Bowel Diseases. Clinical Gastroenterology And Hepatology 2018, 17: 709-718.e7. PMID: 30012429, DOI: 10.1016/j.cgh.2018.07.004.Peer-Reviewed Original ResearchConceptsNon-obese patientsInflammatory bowel diseaseNationwide Readmissions Database 2013Cost of hospitalizationBowel diseaseObese patientsAnnual burdenPropensity scoreHospitalization-related costsOutcomes of hospitalizationRepresentative cohort studyHigh-cost patientsCardiopulmonary complicationsIBD patientsAdjunctive therapyCohort studyIBD phenotypePreventable admissionsHigh burdenPatientsHospitalizationObesityAbstractTextObeseInconsistent associationsAnnual Burden and Costs of Hospitalization for High-Need, High-Cost Patients With Chronic Gastrointestinal and Liver Diseases
Nguyen NH, Khera R, Ohno-Machado L, Sandborn WJ, Singh S. Annual Burden and Costs of Hospitalization for High-Need, High-Cost Patients With Chronic Gastrointestinal and Liver Diseases. Clinical Gastroenterology And Hepatology 2018, 16: 1284-1292.e30. PMID: 29474966, PMCID: PMC6056327, DOI: 10.1016/j.cgh.2018.02.015.Peer-Reviewed Original ResearchConceptsFunctional gastrointestinal disordersChronic liver diseaseInflammatory bowel diseaseHigh-cost patientsCost of hospitalizationGastrointestinal hemorrhageLiver diseasePancreatic diseaseChronic gastrointestinalHospitalization costsAnnual burdenNationwide Readmissions Database 2013Medicare/Medicaid insuranceHigher comorbidity burdenInfection-related hospitalizationNationwide database analysisMultivariate logistic regressionDays/monthLarge rural hospitalPopulation health managementLow-income statusCardiopulmonary causesComorbidity burdenIndex hospitalizationHigh-value care
2015
The differential associations of preexisting conditions with trauma-related outcomes in the presence of competing risks
Calvo R, Lindsay S, Edland S, Macera C, Wingard D, Ohno-Machado L, Sise M. The differential associations of preexisting conditions with trauma-related outcomes in the presence of competing risks. Injury 2015, 47: 677-684. PMID: 26684173, DOI: 10.1016/j.injury.2015.10.055.Peer-Reviewed Original ResearchConceptsPre-existing chronic conditionsOlder trauma patientsHospital mortalityTrauma patientsMortality riskHigh-risk groupLow-risk subgroupsLower mortality riskLonger HLOSHospital lengthMost patientsRisk patientsClinical outcomesLiver diseaseRetrospective studyTrauma populationTrauma-related outcomesRisk regressionChronic conditionsExcess mortalityParkinson's diseaseLevel ICare facilitiesPatientsClinical decision
2010
Positive predictive value of CT urography in the evaluation of upper tract urothelial cancer.
Sadow C, Wheeler S, Kim J, Ohno-Machado L, Silverman S. Positive predictive value of CT urography in the evaluation of upper tract urothelial cancer. American Journal Of Roentgenology 2010, 195: w337-43. PMID: 20966298, DOI: 10.2214/ajr.09.4147.Peer-Reviewed Original ResearchConceptsUpper tract urothelial cancerPositive predictive valueUrothelial cancerUrine cytologyCT urographyPredictive valueUrographic examinationUrothelial thickeningExact testUpper tract urothelial malignanciesMultivariate logistic regression analysisPositive urine cytologyRecords of patientsSignificant univariate predictorsLogistic regression analysisFisher's exact testT-testStudent's t-testEffect of ageFollowup imagingRetrospective reviewPathologic examinationUrothelial malignancyUnivariate predictorsMimic cancer
2008
Validation of an Automated Safety Surveillance System with Prospective, Randomized Trial Data
Matheny M, Morrow D, Ohno-Machado L, Cannon C, Sabatine M, Resnic F. Validation of an Automated Safety Surveillance System with Prospective, Randomized Trial Data. Medical Decision Making 2008, 29: 247-256. PMID: 19015285, PMCID: PMC2743924, DOI: 10.1177/0272989x08327110.Peer-Reviewed Original ResearchMeSH KeywordsBayes TheoremData Interpretation, StatisticalDecision Support TechniquesFibrinolytic AgentsHumansIntracranial HemorrhagesMulticenter Studies as TopicMyocardial InfarctionRandomized Controlled Trials as TopicReproducibility of ResultsRetrospective StudiesSafety ManagementSentinel SurveillanceConceptsIntervention armMortality rateEvent ratesTrial BTrial AMajor bleeding ratesOutcomes Surveillance SystemIntracranial hemorrhage rateCumulative event rateRandomized trial dataEvent-rate analysisSafety surveillance systemSurveillance systemAdverse eventsMulticenter trialHemorrhage rateMonth 14Bleeding rateControl armClinical trialsTrial B.Trial dataTrialsObserved event ratesMonths
2007
Risk-adjusted sequential probability ratio test control chart methods for monitoring operator and institutional mortality rates in interventional cardiology
Matheny M, Ohno-Machado L, Resnic F. Risk-adjusted sequential probability ratio test control chart methods for monitoring operator and institutional mortality rates in interventional cardiology. American Heart Journal 2007, 155: 114-120. PMID: 18082501, DOI: 10.1016/j.ahj.2007.08.022.Peer-Reviewed Original Research
2006
Supratentorial Low-Grade Glioma Resectability: Statistical Predictive Analysis Based on Anatomic MR Features and Tumor Characteristics
Talos I, Zou K, Ohno-Machado L, Bhagwat J, Kikinis R, Black P, Jolesz F. Supratentorial Low-Grade Glioma Resectability: Statistical Predictive Analysis Based on Anatomic MR Features and Tumor Characteristics. Radiology 2006, 239: 506-13. PMID: 16641355, PMCID: PMC1475754, DOI: 10.1148/radiol.2392050661.Peer-Reviewed Original Research
2005
Discrimination and calibration of mortality risk prediction models in interventional cardiology
Matheny M, Ohno-Machado L, Resnic F. Discrimination and calibration of mortality risk prediction models in interventional cardiology. Journal Of Biomedical Informatics 2005, 38: 367-375. PMID: 16198996, DOI: 10.1016/j.jbi.2005.02.007.Peer-Reviewed Original ResearchMeSH KeywordsAngioplasty, Balloon, CoronaryCalibrationCardiologyComorbidityDecision Support Systems, ClinicalDiagnosis, Computer-AssistedDiscriminant AnalysisExpert SystemsHumansIncidenceOutcome Assessment, Health CarePostoperative ComplicationsPrognosisRetrospective StudiesRisk AssessmentRisk FactorsROC CurveSurvival AnalysisSurvival RateUnited StatesConceptsLocal risk modelAcute myocardial infarctionHosmer-Lemeshow goodnessRisk prediction modelRisk factorsCardiology-National Cardiovascular Data RegistryConsecutive percutaneous coronary interventionsMortality risk prediction modelPercutaneous coronary interventionMultivariate risk factorsCertain risk factorsROC curveAccurate risk predictionIndividual casesGood discriminationCardiogenic shockHospital mortalityCoronary interventionUnstable anginaArtery interventionPatient populationMyocardial infarctionRisk modelElective proceduresWomen's HospitalExploration of a Bayesian updating tool to provide real-time safety monitoring for new medical devices.
Matheny M, Ohno-Machado L, Resnic F. Exploration of a Bayesian updating tool to provide real-time safety monitoring for new medical devices. AMIA Annual Symposium Proceedings 2005, 2005: 1045. PMID: 16779332, PMCID: PMC1560574.Peer-Reviewed Original Research
2004
Exploration of a Bayesian Updating Methodology to Monitor the Safety of Interventional Cardiovascular Procedures
Resnic F, Zou K, Do D, Apostolakis G, Ohno-Machado L. Exploration of a Bayesian Updating Methodology to Monitor the Safety of Interventional Cardiovascular Procedures. Medical Decision Making 2004, 24: 399-407. PMID: 15271278, DOI: 10.1177/0272989x04267012.Peer-Reviewed Original ResearchMeSH KeywordsAtherectomy, CoronaryBayes TheoremEquipment SafetyHumansLikelihood FunctionsRetrospective StudiesConceptsConventional statistical methodsPrior probability distributionProbability distributionStatistical methodsBayesian updatingMedical device safety evaluationStable estimatesPatient risk groupsInterventional cardiology proceduresInterventional cardiovascular proceduresBayesianClinical outcomesPatient groupRotational atherectomyRisk groupsCardiovascular proceduresClinical practiceMethodologyCardiology proceduresEstimationEvent ratesSafety experienceEstimation of riskFrameworkNovel approach
2003
No-reflow is an independent predictor of death and myocardial infarction after percutaneous coronary intervention
Resnic F, Wainstein M, Lee M, Behrendt D, Wainstein R, Ohno-Machado L, Kirshenbaum J, Rogers C, Popma J, Piana R. No-reflow is an independent predictor of death and myocardial infarction after percutaneous coronary intervention. American Heart Journal 2003, 145: 42-46. PMID: 12514653, DOI: 10.1067/mhj.2003.36.Peer-Reviewed Original ResearchConceptsPercutaneous coronary interventionPostprocedural myocardial infarctionStrong independent predictorMyocardial infarctionIndependent predictorsSodium nitroprussideInhospital outcomesCoronary interventionClinical outcomesSaphenous vein graft interventionIntracoronary vasodilator therapyVein graft interventionAdministration of verapamilAcute myocardial infarctionRate of deathInhospital mortalityVasodilator therapyCardiogenic shockBaseline demographicsGraft interventionUnstable anginaAdverse eventsConsecutive patientsIntracoronary verapamilInfarction
2001
Vascular closure devices and the risk of vascular complications after percutaneous coronary intervention in patients receiving glycoprotein IIb-IIIa inhibitors
Resnic F, Blake G, Ohno-Machado L, Selwyn A, Popma J, Rogers C. Vascular closure devices and the risk of vascular complications after percutaneous coronary intervention in patients receiving glycoprotein IIb-IIIa inhibitors. The American Journal Of Cardiology 2001, 88: 493-496. PMID: 11524056, DOI: 10.1016/s0002-9149(01)01725-8.Peer-Reviewed Original ResearchMeSH KeywordsAge DistributionAgedAnalysis of VarianceAneurysm, FalseAngioplasty, Balloon, CoronaryAntibodies, MonoclonalAntibodies, Monoclonal, HumanizedArteriovenous FistulaChi-Square DistributionCoronary DiseaseCoronary Vessel AnomaliesCoronary VesselsEquipment SafetyFemaleHematomaHumansIncidenceMaleMiddle AgedMultivariate AnalysisMyocardial InfarctionProbabilityRetrospective StudiesRisk AssessmentRisk FactorsSex DistributionConceptsPercutaneous coronary interventionVascular closure deviceGlycoprotein IIb-IIIa antagonistsVascular complication ratesVascular complicationsClosure deviceCoronary interventionComplication rateLower vascular complication ratesOverall vascular complication rateGlycoprotein IIb-IIIa inhibitorsIIb-IIIa inhibitorsSubgroup of patientsLength of stayHospital stayConsecutive patientsLarge hematomaSurgical repairArteriovenous fistulaPatient populationUnivariate analysisRetrospective analysisComplicationsPatient comfortPatients