2023
Associations between patient sociodemographic factors and non-treatment for localized prostate cancer.
Novosel M, Smani S, Marks V, Jeong F, Sprenkle P, Leapman M. Associations between patient sociodemographic factors and non-treatment for localized prostate cancer. Journal Of Clinical Oncology 2023, 41: 307-307. DOI: 10.1200/jco.2023.41.6_suppl.307.Peer-Reviewed Original ResearchHigh-risk prostate cancerLocalized prostate cancerAggressive prostate cancerProstate cancerWhite patientsLower oddsDefinitive treatmentRisk strataSociodemographic factorsMean patient ageNational Cancer DatabaseHigh-risk diseasePatient sociodemographic factorsMultivariable logistic regressionClinical risk criteriaPatient ageImproved survivalBlack patientsInitial treatmentRisk diseaseAsian patientsRetrospective studyBlack raceInsurance statusPatient raceProstate cancer disparities among American Indians and Alaskan Natives in the United States
Chu C, Leapman M, Zhao S, Cowan J, Washington S, Cooperberg M. Prostate cancer disparities among American Indians and Alaskan Natives in the United States. Journal Of The National Cancer Institute 2023, 115: 413-420. PMID: 36629492, PMCID: PMC10086629, DOI: 10.1093/jnci/djad002.Peer-Reviewed Original ResearchConceptsProstate cancer-specific mortalityProstate-specific antigenAlaska Native patientsCancer-specific mortalityGleason scoreNative patientsDefinitive treatmentWhite patientsProstate cancerTreatment accessAlaska NativesProvider densityHigher prostate-specific antigenAdvanced prostate cancerPatterns of careExternal beam radiationAmerican IndiansProstate cancer disparitiesCounty-level demographicsHealth policy interventionsLower ratesMultivariable adjustmentBaseline characteristicsPathologic factorsWorse survival
2019
Associations of rurality and disease outcomes in urologic malignancies.
Abello A, Casilla-Lennon M, Kenney P, Leapman M. Associations of rurality and disease outcomes in urologic malignancies. Journal Of Clinical Oncology 2019, 37: 661-661. DOI: 10.1200/jco.2019.37.7_suppl.661.Peer-Reviewed Original ResearchCancer-specific deathAssociation of ruralityUrologic malignanciesKidney cancerPoor cancer-specific survivalCox proportional hazards modelRural statusRural countiesCancer-specific survivalEnd Results (SEER) databaseProportional hazards modelPopulation-level dataDefinitive treatmentRural patientsGenitourinary malignanciesTestis cancerUrologic cancersWorse outcomesCancer incidenceDisease PDisease outcomeUrological cancersMultivariable regressionWhite raceOutcome data
2018
Association Between Prostate Magnetic Resonance Imaging and Observation for Low-risk Prostate Cancer
Leapman MS, Wang R, Park HS, Yu JB, Weinreb JC, Gross CP, Ma X. Association Between Prostate Magnetic Resonance Imaging and Observation for Low-risk Prostate Cancer. Urology 2018, 124: 98-106. PMID: 30107188, DOI: 10.1016/j.urology.2018.07.041.Peer-Reviewed Original ResearchConceptsLow-risk prostate cancerProstate magnetic resonance imagingMagnetic resonance imagingProstate cancerDefinitive treatmentPCa diagnosisEnd Results-Medicare databaseResonance imagingMultivariable logistic regression analysisPropensity scoreDiagnosis of PCaUse of MRIConditional logistic regression modelsLogistic regression analysisLogistic regression modelsInitial managementMultivariable analysisGreater oddsPatientsSocioeconomic statusDiagnosisHigher likelihoodRegression analysisDemographic factorsCancerMP53-08 USE OF PROSTATE MAGNETIC RESONANCE IMAGING AMONG MEDICARE BENEFICIARIES WITH LOW-RISK PROSTATE CANCER IS ASSOCIATED WITH A HIGHER LIKELIHOOD OF DEFINITIVE TREATMENT
Leapman M, Wang R, Park H, Yu J, Gross C, Ma X. MP53-08 USE OF PROSTATE MAGNETIC RESONANCE IMAGING AMONG MEDICARE BENEFICIARIES WITH LOW-RISK PROSTATE CANCER IS ASSOCIATED WITH A HIGHER LIKELIHOOD OF DEFINITIVE TREATMENT. Journal Of Urology 2018, 199: e707. DOI: 10.1016/j.juro.2018.02.1679.Peer-Reviewed Original ResearchNational determinants of active surveillance among patients with clinical stage 1A kidney tumors.
Lu A, Nguyen K, Nolte A, Alimi O, Hsiang W, Ghabili K, Syed J, Shuch B, Leapman M. National determinants of active surveillance among patients with clinical stage 1A kidney tumors. Journal Of Clinical Oncology 2018, 36: 694-694. DOI: 10.1200/jco.2018.36.6_suppl.694.Peer-Reviewed Original ResearchSmall renal massesNational Cancer DatabaseActive surveillanceInitial managementRenal massesCancer DatabaseClinical T1a renal massesMultivariate logistic regression modelFacility-level differencesWest North Central census divisionCancer registry dataT1a renal massesLogistic regression modelsSocio-demographic determinantsDefinitive therapyDefinitive treatmentPatient ageTotal cohortPractice patternsNational utilizationRegistry dataInclusion criteriaCaucasian raceKidney tumorsPatients
2017
Active Surveillance in Younger Men With Prostate Cancer
Leapman MS, Cowan JE, Nguyen HG, Shinohara KK, Perez N, Cooperberg MR, Catalona WJ, Carroll PR. Active Surveillance in Younger Men With Prostate Cancer. Journal Of Clinical Oncology 2017, 35: jco.2016.68.005. PMID: 28346806, PMCID: PMC5466007, DOI: 10.1200/jco.2016.68.0058.Peer-Reviewed Original ResearchConceptsBiopsy-based Gleason scoreActive surveillanceAssociation of ageProstate cancerDefinitive treatmentRadical prostatectomyYounger patientsGleason scoreMultivariable Cox proportional hazards regressionYounger ageLow-risk prostate cancerCox proportional hazards regressionGleason score upgradeInitial active surveillanceRelated end pointsCox regression analysisKaplan-Meier methodYounger patient ageProportional hazards regressionPrimary study objectiveInitial biopsyMedian agePatient ageHazards regressionBiochemical outcomes
2016
Relationship of phosphodiesterase type 5 inhibitor to biochemical recurrence after definitive therapy for prostate cancer.
Leapman M, Cowan J, Nguyen H, Porten S, Cooperberg M, Carroll P. Relationship of phosphodiesterase type 5 inhibitor to biochemical recurrence after definitive therapy for prostate cancer. Journal Of Clinical Oncology 2016, 34: 119-119. DOI: 10.1200/jco.2016.34.2_suppl.119.Peer-Reviewed Original ResearchPhosphodiesterase type 5 inhibitorsBiochemical recurrenceType 5 inhibitorsProstate cancerUse of PDE5iMedian age 61 yearsMedian age 69 yearsProstate Strategic Urologic Research EndeavorRisk of BCRCox proportional hazards modelAndrogen deprivation therapyAge 61 yearsAge 69 yearsKaplan-Meier methodSexual function scoresCohort of menProportional hazards modelDeprivation therapyPrescription complianceDefinitive therapyTime-dependent useDefinitive treatmentDisease recurrenceClinical evidenceBaseline use