2024
Area Vulnerability and Disparities in Therapy for Patients With Metastatic Renal Cell Carcinoma
Rahman S, Long J, Westvold S, Leapman M, Spees L, Hurwitz M, McManus H, Gross C, Wheeler S, Dinan M. Area Vulnerability and Disparities in Therapy for Patients With Metastatic Renal Cell Carcinoma. JAMA Network Open 2024, 7: e248747. PMID: 38687479, PMCID: PMC11061765, DOI: 10.1001/jamanetworkopen.2024.8747.Peer-Reviewed Original ResearchConceptsMetastatic renal cell carcinomaArea-level measuresRenal cell carcinomaPatient-level factorsSystemic therapyEthnic disparitiesRelative risk ratiosSocially vulnerable areasCell carcinomaMeasures of social vulnerabilityMedicare beneficiariesCohort studyFee-for-service Medicare Parts AOdds ratioReceipt of systemic therapyLogistic regressionArea-level characteristicsAssociated with lack of treatmentNon-Hispanic blacksRetrospective cohort studyIndividual-level demographicsNon-Hispanic whitesAssociated with disparitiesUS Medicare beneficiariesMeasures of disadvantage
2023
Relative Burden of Cancer and Noncancer Mortality Among Long-Term Survivors of Breast, Prostate, and Colorectal Cancer in the US
Kc M, Fan J, Hyslop T, Hassan S, Cecchini M, Wang S, Silber A, Leapman M, Leeds I, Wheeler S, Spees L, Gross C, Lustberg M, Greenup R, Justice A, Oeffinger K, Dinan M. Relative Burden of Cancer and Noncancer Mortality Among Long-Term Survivors of Breast, Prostate, and Colorectal Cancer in the US. JAMA Network Open 2023, 6: e2323115. PMID: 37436746, PMCID: PMC10339147, DOI: 10.1001/jamanetworkopen.2023.23115.Peer-Reviewed Original ResearchConceptsLong-term survivorsCancer-specific mortalityColorectal cancerCancer cohortReceptor statusInitial diagnosisGleason scoreProstate cancerBreast cancerLong-term adult survivorsMedian cancer-specific survivalEnd Results cancer registryProstate-specific antigen levelRectal cancer cohortCancer-specific survivalStage III diseaseYear of diagnosisProgesterone receptor statusEstrogen receptor statusProportion of deathsSurvival time ratioEarly-stage cancerNononcologic outcomesIndex cancerLocalized diseaseDisparities in immune and targeted therapy utilization for older US patients with metastatic renal cell carcinoma
Chow R, Long J, Hassan S, Wheeler S, Spees L, Leapman M, Hurwitz M, McManus H, Gross C, Dinan M. Disparities in immune and targeted therapy utilization for older US patients with metastatic renal cell carcinoma. JNCI Cancer Spectrum 2023, 7: pkad036. PMID: 37202354, PMCID: PMC10276895, DOI: 10.1093/jncics/pkad036.Peer-Reviewed Original ResearchConceptsOral anticancer agentsTherapy utilizationMedicare beneficiariesNon-Hispanic white raceMetastatic renal cell carcinomaNon-Hispanic black raceOlder US patientsUS Medicare beneficiariesRenal cell carcinomaLogistic regression modelsTherapy receiptMultivariable adjustmentSystemic therapyMale sexUS patientsCell carcinomaStudy criteriaBlack raceFemale sexPatient raceWhite raceImmunotherapyOutcomes persistSexPatientsFactors Associated With Receipt of Molecular Testing and its Impact on Time to Initial Systemic Therapy in Metastatic Non-Small Cell Lung Cancer
Osazuwa-Peters O, Wilson L, Check D, Roberts M, Srinivasan S, Clark A, Crawford J, Chrischilles E, Carnahan R, Campbell W, Cowell L, Greenlee R, Abbott A, Mosa A, Mandhadi V, Stoddard A, Dinan M. Factors Associated With Receipt of Molecular Testing and its Impact on Time to Initial Systemic Therapy in Metastatic Non-Small Cell Lung Cancer. Clinical Lung Cancer 2023, 24: 305-312. PMID: 37055337, DOI: 10.1016/j.cllc.2023.03.001.Peer-Reviewed Original ResearchConceptsInitial systemic treatmentSystemic treatmentMolecular testingComorbidity statusMetastatic non-small cell lung cancer patientsMetastatic non-small cell lung cancerTime-varying Cox regression modelsNon-small cell lung cancer patientsProportional hazardsNon-small cell lung cancerCell lung cancer patientsInitial systemic therapyMolecular testing ratesRetrospective cohort studyMajority of patientsCell lung cancerCox regression modelLung cancer patientsNon-Hispanic white individualsCox proportional hazardsYears of ageRace/ethnicityAdult patientsCohort studyPatient age
2022
Mediators of Racial Disparity in the Use of Prostate Magnetic Resonance Imaging Among Patients With Prostate Cancer
Leapman MS, Dinan M, Pasha S, Long J, Washington SL, Ma X, Gross CP. Mediators of Racial Disparity in the Use of Prostate Magnetic Resonance Imaging Among Patients With Prostate Cancer. JAMA Oncology 2022, 8: 687-696. PMID: 35238879, PMCID: PMC8895315, DOI: 10.1001/jamaoncol.2021.8116.Peer-Reviewed Original ResearchConceptsProstate magnetic resonance imagingMagnetic resonance imagingPopulation-based cohort studyProstate cancerWhite patientsRacial disparitiesCohort studyMRI useIndividual-level socioeconomic statusEligible male patientsSocioeconomic statusNeighborhood-level socioeconomic statusLocalized prostate cancerProstate cancer diagnosisObserved racial disparitiesProstate magnetic resonanceMediation analysisPathologic factorsMale patientsUS SurveillanceBlack patientsMedicare databaseMAIN OUTCOMEUS adultsNew diagnosis
2021
Adoption of New Risk Stratification Technologies Within US Hospital Referral Regions and Association With Prostate Cancer Management
Leapman MS, Wang R, Park HS, Yu JB, Sprenkle PC, Dinan MA, Ma X, Gross CP. Adoption of New Risk Stratification Technologies Within US Hospital Referral Regions and Association With Prostate Cancer Management. JAMA Network Open 2021, 4: e2128646. PMID: 34623406, PMCID: PMC8501394, DOI: 10.1001/jamanetworkopen.2021.28646.Peer-Reviewed Original ResearchConceptsProstate magnetic resonance imagingMagnetic resonance imagingHospital referral regionsProportion of patientsProstate cancerGenomic testingCohort studyReferral regionsRetrospective cohort studyProstate cancer carePatient-level analysisCommercial insurance claimsProstate cancer managementUS hospital referral regionsYears of ageProportion of menPatients 40Definitive treatmentCancer careTesting uptakeHRR levelMAIN OUTCOMECancer managementPatientsRegional uptakeProvider‐ and patient‐level predictors of oral anticancer agent initiation and adherence in patients with metastatic renal cell carcinoma
Spees LP, Wheeler SB, Jackson BE, Baggett CD, Wilson LE, Greiner MA, Kaye DR, Zhang T, George D, Scales CD, Pritchard JE, Leapman M, Gross CP, Dinan MA. Provider‐ and patient‐level predictors of oral anticancer agent initiation and adherence in patients with metastatic renal cell carcinoma. Cancer Medicine 2021, 10: 6653-6665. PMID: 34480518, PMCID: PMC8495289, DOI: 10.1002/cam4.4201.Peer-Reviewed Original ResearchConceptsMetastatic renal cell carcinomaPatient-level factorsRenal cell carcinomaCell carcinomaRisk ratioState cancer registry dataPatient-level predictorsPatient-level characteristicsCancer registry dataProvider Enumeration SystemMRCC diagnosisMedical oncologyInsurance typeMedicare patientsRegistry dataFemale providersPatientsMedian proportionPoisson regressionCare issuesPrivate insuranceMale providersAdherenceCarcinomaAnticancer agentsReporting of Study Participant Demographic Characteristics and Demographic Representation in Premarketing and Postmarketing Studies of Novel Cancer Therapeutics
Varma T, Wallach JD, Miller JE, Schnabel D, Skydel JJ, Zhang AD, Dinan MA, Ross JS, Gross CP. Reporting of Study Participant Demographic Characteristics and Demographic Representation in Premarketing and Postmarketing Studies of Novel Cancer Therapeutics. JAMA Network Open 2021, 4: e217063. PMID: 33877309, PMCID: PMC8058642, DOI: 10.1001/jamanetworkopen.2021.7063.Peer-Reviewed Original ResearchConceptsNovel cancer therapeuticsPostmarketing studyBlack patientsCancer therapeuticsDemographic dataOlder adultsUS cancer populationUS Cancer StatisticsCross-sectional studyRace/ethnicityParticipants' demographic characteristicsPercentage of trialsPatient sexCancer populationClinical studiesCancer statisticsMAIN OUTCOMEDrug AdministrationFDA approvalStudy participantsCancer typesDemographic characteristicsDemographic informationStudy samplePatientsTreatment at Integrated Centers Might Bridge the Academic-Community Survival Gap in Patients With Metastatic Non-Small Cell Carcinoma of the Lung
Ramalingam S, Dinan M, Crawford J. Treatment at Integrated Centers Might Bridge the Academic-Community Survival Gap in Patients With Metastatic Non-Small Cell Carcinoma of the Lung. Clinical Lung Cancer 2021, 22: e646-e653. PMID: 33582071, DOI: 10.1016/j.cllc.2020.12.013.Peer-Reviewed Original ResearchConceptsNon-small cell lung cancerMetastatic non-small cell lung cancerCommunity-based centersAcademic centersMetastatic non-small cell carcinomaNon-small cell carcinomaStudy periodPrimary end pointNational Cancer DatabaseCell lung cancerSquamous cell carcinomaCancer-related deathMost cancer-related deathsTreatment-related improvementOverall survivalSurvival gapSurvival disparitiesImproved survivalCell carcinomaLung cancerCancer DatabaseRetrospective analysisNew therapiesPatientsEnd point
2020
Rapid rise in the cost of targeted cancer therapies for Medicare patients with solid tumors from 2006 to 2015
Wilson LE, Greiner MA, Altomare I, Rotter J, Dinan MA. Rapid rise in the cost of targeted cancer therapies for Medicare patients with solid tumors from 2006 to 2015. Journal Of Geriatric Oncology 2020, 12: 375-380. PMID: 33250425, DOI: 10.1016/j.jgo.2020.11.007.Peer-Reviewed Original ResearchConceptsProstate cancerCancer costsLung cancerBreast cancerProportion of patientsSystemic anticancer therapyPart D enrollmentNew malignanciesPatients 65Systemic therapyMedicare 5Colorectal cancerInvasive lungMedicare patientsCohort analysisMedicare populationMedicare beneficiariesPatientsSolid tumorsTherapyCancerAnticancer therapyCancer therapyFinancial burdenLungAssociation of 21-Gene Assay (OncotypeDX) Testing and Receipt of Chemotherapy in the Medicare Breast Cancer Patient Population Following Initial Adoption
Dinan MA, Wilson LE, Reed SD, Griggs JJ, Norton EC. Association of 21-Gene Assay (OncotypeDX) Testing and Receipt of Chemotherapy in the Medicare Breast Cancer Patient Population Following Initial Adoption. Clinical Breast Cancer 2020, 20: 487-494.e1. PMID: 32653473, DOI: 10.1016/j.clbc.2020.05.010.Peer-Reviewed Original Research
2019
Extent of surgery for low-risk thyroid cancer in the elderly: Equipoise in survival but not in short-term outcomes
Zambeli-Ljepović A, Wang F, Dinan MA, Hyslop T, Stang MT, Roman SA, Sosa JA, Scheri RP. Extent of surgery for low-risk thyroid cancer in the elderly: Equipoise in survival but not in short-term outcomes. Surgery 2019, 166: 895-900. PMID: 31288935, PMCID: PMC6802283, DOI: 10.1016/j.surg.2019.05.035.Peer-Reviewed Original ResearchConceptsPapillary thyroid cancerLow-risk papillary thyroid cancerEmergency department visitsShort-term outcomesTotal thyroidectomyThyroid cancerFemale patientsBlack patientsEnd Results-Medicare databaseMore emergency department visitsLow-risk thyroid cancerExtent of thyroidectomyExtent of surgeryMultivariable logistic regressionUnderwent lobectomyUnplanned readmissionOlder patientsAvoidable complicationsMean ageMorbidity increasesThyroidectomyPatientsReadmissionComplicationsLobectomyLow-Risk Thyroid Cancer in Elderly: Total Thyroidectomy/RAI Predominates but Lacks Survival Advantage
Zambeli-Ljepović A, Wang F, Dinan MA, Hyslop T, Roman SA, Sosa J, Scheri RP. Low-Risk Thyroid Cancer in Elderly: Total Thyroidectomy/RAI Predominates but Lacks Survival Advantage. Journal Of Surgical Research 2019, 243: 189-197. PMID: 31185435, PMCID: PMC6773493, DOI: 10.1016/j.jss.2019.05.029.Peer-Reviewed Original ResearchConceptsDisease-specific survivalPapillary thyroid cancerExtent of surgeryTotal thyroidectomyTumor sizeThyroid cancerLow-risk papillary thyroid cancerEnd Results-Medicare databaseLow-risk thyroid cancerOlder adultsNational treatment patternsRadioactive iodine administrationUnderwent total thyroidectomyLarger tumor sizeMultivariable logistic regressionQuality of lifeMost older adultsPostoperative RAIRAI administrationCompletion thyroidectomyExcellent prognosisOlder patientsExtensive surgeryFavorable prognosisMedian ageShared-patient physician networks and their impact on the uptake of genomic testing in breast cancer
Rotter J, Wilson L, Greiner MA, Pollack CE, Dinan M. Shared-patient physician networks and their impact on the uptake of genomic testing in breast cancer. Breast Cancer Research And Treatment 2019, 176: 445-451. PMID: 31028607, PMCID: PMC6556129, DOI: 10.1007/s10549-019-05248-2.Peer-Reviewed Original ResearchConceptsPatient-level analysisOncotype DXBreast cancerMedical oncologistsEarly-stage breast cancerGenomic testingPhysician networksODX testingMore patientsRetrospective studySEER-MedicareStudy criteriaSuboptimal treatmentCancer patientsMedian numberModifiable driversModifiable meansPatientsOncologistsLogistic mixed modelsEarly adoption periodWomenCancerPhysiciansGenomic assays
2018
Survival Comparison in Patients with Stage IV Lung Cancer in Academic versus Community Centers in the United States
Ramalingam S, Dinan MA, Crawford J. Survival Comparison in Patients with Stage IV Lung Cancer in Academic versus Community Centers in the United States. Journal Of Thoracic Oncology 2018, 13: 1842-1850. PMID: 30312680, DOI: 10.1016/j.jtho.2018.09.007.Peer-Reviewed Original ResearchMeSH KeywordsAcademic Medical CentersAdenocarcinoma of LungAntineoplastic Combined Chemotherapy ProtocolsCarcinoma, Large CellCarcinoma, Non-Small-Cell LungCarcinoma, Squamous CellCommunity Health CentersFemaleFollow-Up StudiesHumansLung NeoplasmsMaleMiddle AgedNeoplasm StagingRetrospective StudiesSurvival RateUnited StatesConceptsCommunity-based centersNational Cancer DatabaseSquamous cell carcinomaAcademic centersMetastatic NSCLCCell carcinomaLung cancerCancer DatabaseStage IV lung cancerSquamous cell lung cancerStage IV NSCLCPercentage of patientsYear of diagnosisCell lung cancerVariety of chemotherapyMultivariable regression modelsPrimary outcomeHistologic typeMultivariable analysisSignificant relative increasePrimary payerSurvival differencesSurvival comparisonsMultivariable modelTreatment strategiesAdvanced imaging and hospice use in end-of-life cancer care
Dinan MA, Curtis LH, Setoguchi S, Cheung WY. Advanced imaging and hospice use in end-of-life cancer care. Supportive Care In Cancer 2018, 26: 3619-3625. PMID: 29728843, DOI: 10.1007/s00520-018-4223-0.Peer-Reviewed Original ResearchMeSH KeywordsAgedAged, 80 and overBlack or African AmericanBreast NeoplasmsColorectal NeoplasmsComorbidityDiagnostic ImagingFemaleHospice CareHospicesHumansLung NeoplasmsMaleMedicareMiddle AgedNeoplasmsOutcome Assessment, Health CareProstatic NeoplasmsReferral and ConsultationRetrospective StudiesSEER ProgramTerminal CareUnited StatesConceptsHospital referral regionsHospice enrollmentComputerized tomographyHospice useLife careReferral regionsAdvanced imagingPopulation-based retrospective studyHigh rateLate hospice enrollmentLife cancer careMultivariable logistic regressionSEER-Medicare dataMagnetic resonance imagingPositron emission tomographyEnd of lifeGreater comorbidityReal-world practiceAggressive endBlack patientsMultivariable analysisRetrospective studyResultsA totalStudy criteriaCancer care
2016
ONCOLOGISTS’ BARRIERS AND FACILITATORS FOR ONCOTYPE DX USE: QUALITATIVE STUDY
Roberts MC, Bryson A, Weinberger M, Dusetzina SB, Dinan MA, Reeder-Hayes K, Wheeler SB. ONCOLOGISTS’ BARRIERS AND FACILITATORS FOR ONCOTYPE DX USE: QUALITATIVE STUDY. International Journal Of Technology Assessment In Health Care 2016, 32: 355-361. PMID: 27958190, PMCID: PMC6526532, DOI: 10.1017/s026646231600060x.Peer-Reviewed Original ResearchConceptsAdjuvant chemotherapy decisionsBreast cancer patientsOncotype DXTreatment decisionsCancer patientsChemotherapy decisionsHormone receptor-positive breast cancer patientsClinical practiceReceptor-positive breast cancer patientsPositive breast cancer patientsOncotype DX useUnited States guidelinesProfiling testsEligible womenSurgical oncologistsCancer careClinical guidelinesModifiable barriersOncologistsMulti-level factorsPatientsThematic saturationPhone interviewsIntermediate scoresQualitative studyHow Many Lymph Nodes Are Enough? Assessing the Adequacy of Lymph Node Yield for Papillary Thyroid Cancer
Robinson TJ, Thomas S, Dinan MA, Roman S, Sosa JA, Hyslop T. How Many Lymph Nodes Are Enough? Assessing the Adequacy of Lymph Node Yield for Papillary Thyroid Cancer. Journal Of Clinical Oncology 2016, 34: 3434-3439. PMID: 27528716, PMCID: PMC6366339, DOI: 10.1200/jco.2016.67.6437.Peer-Reviewed Original ResearchConceptsPapillary thyroid cancerOccult nodal diseaseLymph nodesThyroid cancerNodal diseaseTumor stageNumber of LNsProphylactic central neck dissectionAdjuvant radioactive iodineLymph node examinationIntermediate-risk diseaseNational Cancer DatabaseMore lymph nodesNode-positive diseasePathologic tumor stagePrimary tumor stageCentral neck dissectionLymph node yieldLN yieldAdult patientsLN evaluationNeck dissectionNodal positivityNode examinationOccult diseasePatient-Centered Communication for Discussing Oncotype DX Testing
Roberts MC, Bryson A, Weinberger M, Dusetzina SB, Dinan MA, Reeder-Hayes KE, Wheeler SB. Patient-Centered Communication for Discussing Oncotype DX Testing. Cancer Investigation 2016, 34: 205-212. PMID: 27124287, PMCID: PMC4984670, DOI: 10.3109/07357907.2016.1172637.Peer-Reviewed Original Research
2015
Knowledge of pathologically versus clinically negative lymph nodes is associated with reduced use of radioactive iodine post-thyroidectomy for low-risk papillary thyroid cancer
Ruel E, Thomas S, Dinan MA, Perkins JM, Roman SA, Sosa JA. Knowledge of pathologically versus clinically negative lymph nodes is associated with reduced use of radioactive iodine post-thyroidectomy for low-risk papillary thyroid cancer. Endocrine 2015, 52: 579-586. PMID: 26708045, PMCID: PMC4880494, DOI: 10.1007/s12020-015-0826-0.Peer-Reviewed Original ResearchMeSH KeywordsAdultAgedAged, 80 and overCarcinomaCarcinoma, PapillaryCombined Modality TherapyDatabases, FactualFemaleHumansIodine RadioisotopesKnowledgeLymph NodesLymphatic MetastasisMaleMiddle AgedPostoperative PeriodPrognosisRadiotherapy DosageRisk FactorsSurvival AnalysisThyroid Cancer, PapillaryThyroid NeoplasmsThyroidectomyConceptsNegative lymph nodesPapillary thyroid cancerLow-risk papillary thyroid cancerLymph nodesCN0 patientsRAI useThyroid cancerPostoperative radioactive iodine administrationTrue nodal statusExcised lymph nodesLow-risk patientsLymph node statusRadioactive iodine administrationNegative surgical marginsOdds of receiptSurgical pathology specimensCut-point analysisPN0 patientsPN0 statusPostoperative RAIRAI administrationCervical lymphMultivariable adjustmentTotal thyroidectomyNodal status