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 uptake
2020
Birth Characteristics and Risk of Pediatric Thyroid Cancer: A Population-Based Record-Linkage Study in California
Deziel N, Zhang Y, Wang R, Wiemels JL, Morimoto L, Clark CJ, Metayer C, Ma X. Birth Characteristics and Risk of Pediatric Thyroid Cancer: A Population-Based Record-Linkage Study in California. Thyroid 2020, 31: 596-606. PMID: 32912083, PMCID: PMC8195873, DOI: 10.1089/thy.2020.0217.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAdultAge of OnsetBirth CertificatesBirth OrderBirth WeightCaliforniaCase-Control StudiesChildChild, PreschoolEducational StatusFemaleHispanic or LatinoHumansIncidenceInfantInfant, NewbornMaleRace FactorsRegistriesRisk AssessmentRisk FactorsSex FactorsThyroid NeoplasmsTime FactorsYoung AdultConceptsPediatric thyroid cancerHigh birth weightFollicular thyroid cancerThyroid cancerHigher birth orderBirth characteristicsRisk factorsHispanic ethnicityBirth weightOdds ratioFirst primary thyroid cancerPapillary thyroid cancer casesBirth orderMultivariable logistic regression modelSecond primary malignanciesLong-term therapyAdjusted odds ratioPopulation-based studyPrimary thyroid cancerRecord linkage studyConfidence intervalsImportant risk factorCancer registry dataCase-control studyThyroid cancer casesLifestyle factors and risk of myeloproliferative neoplasms in the NIH‐AARP diet and health study
Podoltsev NA, Wang X, Wang R, Hofmann JN, Liao LM, Zeidan AM, Mesa R, Ma X. Lifestyle factors and risk of myeloproliferative neoplasms in the NIH‐AARP diet and health study. International Journal Of Cancer 2020, 147: 948-957. PMID: 31904114, PMCID: PMC8919268, DOI: 10.1002/ijc.32853.Peer-Reviewed Original ResearchConceptsNIH-AARP DietPolycythemia veraMyeloproliferative neoplasmsEssential thrombocythemiaHazard ratioLifestyle factorsCaffeine intakeHealth StudyMultivariable Cox proportional hazards regression modelsCox proportional hazards regression modelRisk of PVProportional hazards regression modelsRisk of MPNLarge prospective studiesHazards regression modelsConfidence intervalsPhiladelphia chromosome-negative myeloproliferative neoplasmsMPN riskOverall cohortProspective cohortProspective studyInverse associationRisk factorsPV riskProtective effect
2019
Impact of Hydroxyurea on Survival and Risk of Thrombosis Among Older Patients With Essential Thrombocythemia.
Podoltsev NA, Zhu M, Zeidan AM, Wang R, Wang X, Davidoff AJ, Huntington SF, Giri S, Gore SD, Ma X. Impact of Hydroxyurea on Survival and Risk of Thrombosis Among Older Patients With Essential Thrombocythemia. Journal Of The National Comprehensive Cancer Network 2019, 17: 211-219. PMID: 30865915, DOI: 10.6004/jnccn.2018.7095.Peer-Reviewed Original ResearchConceptsImpact of hydroxyureaThrombotic eventsEssential thrombocythemiaEffect of hydroxyureaOlder patientsOverall survivalLower riskMultivariable Cox proportional hazards regression modelsCox proportional hazards regression modelHigh-risk essential thrombocythemiaProportional hazards regression modelsRetrospective cohort studyRisk of deathSEER-Medicare databaseHazards regression modelsRisk of thrombosisHU usersFrontline therapyCohort studyCurrent guidelinesStudy populationPatientsReal-world settingThrombosisOlder adults
2018
Prostate cancer risk factors in black and white men in the NIH-AARP Diet and Health Study
Layne TM, Graubard BI, Ma X, Mayne ST, Albanes D. Prostate cancer risk factors in black and white men in the NIH-AARP Diet and Health Study. Prostate Cancer And Prostatic Diseases 2018, 22: 91-100. PMID: 30108373, PMCID: PMC6676904, DOI: 10.1038/s41391-018-0070-9.Peer-Reviewed Original ResearchConceptsProstate cancer riskHazard ratioWhite menAdvanced diseaseBlack raceRisk factorsCancer riskHealth StudyRisk associationDietary vitamin D intakeProstate cancer risk factorsProportional hazards regression modelsBlack menNon-Hispanic white menPositive risk associationVitamin D intakeHistory of diabetesNIH-AARP DietCancer risk factorsProstate cancer screeningHazards regression modelsConfidence intervalsHealth-related factorsCancer risk associationsRace-specific associationsAssociation 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 ResearchMeSH KeywordsAgedHumansMagnetic Resonance ImagingMaleProstatic NeoplasmsRisk AssessmentWatchful WaitingConceptsLow-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 factorsCancer
2017
Risk of myeloid neoplasms after radiotherapy among older women with localized breast cancer: A population-based study
Zeidan AM, Long JB, Wang R, Hu X, Yu JB, Huntington SF, Abel GA, Mougalian SS, Podoltsev NA, Gore SD, Gross CP, Ma X, Davidoff AJ. Risk of myeloid neoplasms after radiotherapy among older women with localized breast cancer: A population-based study. PLOS ONE 2017, 12: e0184747. PMID: 28902882, PMCID: PMC5597231, DOI: 10.1371/journal.pone.0184747.Peer-Reviewed Original ResearchConceptsBreast cancer survivorsMyeloid neoplasmsCancer survivorsBreast cancerOlder womenOlder breast cancer survivorsTherapy-related myeloid neoplasmsCompeting-risks survival analysisAbsolute risk increaseBenefits of radiotherapyPopulation-based studyAbsence of chemotherapyRisk of developmentMultiple sensitivity analysesEligible patientsSubsequent chemotherapyAdjuvant radiotherapyLocalized diseaseCumulative incidenceInitial treatmentSEER registryPoor outcomeTreatment recommendationsMedicare claimsMN diagnosis
2015
Organophosphate insecticide use and cancer incidence among spouses of pesticide applicators in the Agricultural Health Study
Lerro CC, Koutros S, Andreotti G, Friesen MC, Alavanja MC, Blair A, Hoppin JA, Sandler DP, Lubin JH, Ma X, Zhang Y, Freeman L. Organophosphate insecticide use and cancer incidence among spouses of pesticide applicators in the Agricultural Health Study. Occupational And Environmental Medicine 2015, 72: 736. PMID: 26150671, PMCID: PMC4909328, DOI: 10.1136/oemed-2014-102798.Peer-Reviewed Original ResearchConceptsCancer incidenceRelative riskCancer riskPesticide applicatorsAgricultural Health Study cohortOP useHealth Study cohortAgricultural Health StudyNon-Hodgkin lymphomaReproductive health historyStudy cohortPotential confoundersOvarian cancerThyroid cancerBreast cancerElevated riskEpidemiological studiesHealth StudyHealth historyPoisson regressionMale populationCancerFurther evaluationDemographic informationSpecific organophosphates
2014
Disease Risk Estimation by Combining Case–Control Data with Aggregated Information on the Population at Risk
Chang X, Waagepetersen R, Yu H, Ma X, Holford TR, Wang R, Guan Y. Disease Risk Estimation by Combining Case–Control Data with Aggregated Information on the Population at Risk. Biometrics 2014, 71: 114-121. PMID: 25351292, PMCID: PMC4782587, DOI: 10.1111/biom.12256.Peer-Reviewed Original ResearchConceptsCase-control dataUnbiased estimating equationsFinite sample performanceNovel statistical frameworkSummary statisticsAsymptotic propertiesPopulation Estimates ProgramStatistical frameworkSubstantive applicationsEstimating EquationsEquationsStatisticsStandard approachEstimationEstimates ProgramEstimatorRisk estimationSimulationsApproach
2011
Genetic Variation in Base Excision Repair Pathway Genes, Pesticide Exposure, and Prostate Cancer Risk
Barry KH, Koutros S, Berndt SI, Andreotti G, Hoppin JA, Sandler DP, Burdette LA, Yeager M, Freeman LE, Lubin JH, Ma X, Zheng T, Alavanja MC. Genetic Variation in Base Excision Repair Pathway Genes, Pesticide Exposure, and Prostate Cancer Risk. Environmental Health Perspectives 2011, 119: 1726-1732. PMID: 21810555, PMCID: PMC3261977, DOI: 10.1289/ehp.1103454.Peer-Reviewed Original ResearchConceptsProstate cancer riskCancer riskSingle nucleotide polymorphismsPesticide applicatorsCT/TT genotypesPesticide manufacturing workersCase-control studyProstate cancer casesLogistic regression modelsTag single nucleotide polymorphismsBase excision repair pathway genesProstate cancerCancer casesFamily historyOxidative DNA damageTT genotypeCC genotypeMale controlsExposure variablesPesticide exposureBase excision repairManufacturing workersUnderlying mechanismRiskBER genes
2010
A meta-analysis of the association between day-care attendance and childhood acute lymphoblastic leukaemia
Urayama KY, Buffler PA, Gallagher ER, Ayoob JM, Ma X. A meta-analysis of the association between day-care attendance and childhood acute lymphoblastic leukaemia. International Journal Of Epidemiology 2010, 39: 718-732. PMID: 20110276, PMCID: PMC2878455, DOI: 10.1093/ije/dyp378.Peer-Reviewed Original ResearchConceptsDay care attendanceAcute lymphoblastic leukemiaChildhood acute lymphoblastic leukemiaLymphoblastic leukemiaOdds ratioRisk of childhoodCase-control studyEarly life exposureRandom-effects modelCommon infectionsSubgroup analysisProphylactic interventionsInfluence of timingObservational studyChildhood leukemiaStudy heterogeneityPubMed databaseInfected individualsRisk estimatesSimilar findingsLeukemiaInfectionEarly childhoodRare responsesEffects model
2009
Dietary Meat Intake in Relation to Colorectal Adenoma in Asymptomatic Women
Ferrucci LM, Sinha R, Graubard BI, Mayne ST, Ma X, Schatzkin A, Schoenfeld PS, Cash BD, Flood A, Cross AJ. Dietary Meat Intake in Relation to Colorectal Adenoma in Asymptomatic Women. The American Journal Of Gastroenterology 2009, 104: ajg2009102. PMID: 19367270, PMCID: PMC2891034, DOI: 10.1038/ajg.2009.102.Peer-Reviewed Original ResearchMeSH KeywordsAdenomaAdultAgedColonoscopyColorectal NeoplasmsConfidence IntervalsCookingCross-Sectional StudiesDietFemaleFollow-Up StudiesHeterocyclic CompoundsHumansIncidenceLogistic ModelsMass ScreeningMeat ProductsMiddle AgedMultivariate AnalysisOdds RatioReference ValuesRisk AssessmentSeverity of Illness IndexConceptsColorectal adenomasAsymptomatic womenMeat intakeOdds ratioRed meatMeat-cooking methodsColorectal adenoma casesConfidence intervalsPan-fried meatDietary meat intakeEligible womenDoneness levelFood frequencyAdenoma casesHigh intakeAdenomasMeat mutagensLogistic regressionIntakeWomenScreening studyColonoscopyComponents of meatPositive associationFurther investigation
2008
Exposure to infections through day-care attendance and risk of childhood leukaemia
Urayama KY, Ma X, Buffler PA. Exposure to infections through day-care attendance and risk of childhood leukaemia. Radiation Protection Dosimetry 2008, 132: 259-266. PMID: 18940822, PMCID: PMC2879097, DOI: 10.1093/rpd/ncn271.Peer-Reviewed Original ResearchConceptsDay care attendanceRisk of childhoodAcute lymphoblastic leukemiaChildhood leukemiaCommon infectionsMore common infectionsNon-Hispanic white childrenNorthern California Childhood Leukemia StudyCommon B-cell precursorDose-response effectPrevious epidemiological studiesCalifornia Childhood Leukemia StudyChildhood Leukemia StudyB cell precursorsDay care settingsSummary measuresLymphoblastic leukemiaEpidemiological studiesNumber of childrenMajority of studiesInfectionLeukemiaLeukemia StudySocial contactRelevant studies
2005
Maternal Pregnancy Loss, Birth Characteristics, and Childhood Leukemia (United States)
Ma X, Metayer C, Does MB, Buffler PA. Maternal Pregnancy Loss, Birth Characteristics, and Childhood Leukemia (United States). Cancer Causes & Control 2005, 16: 1075-1083. PMID: 16184473, DOI: 10.1007/s10552-005-0356-9.Peer-Reviewed Original ResearchMeSH KeywordsAbortion, SpontaneousAdolescentBirth CertificatesBirth IntervalsBirth OrderBirth WeightCaliforniaCase-Control StudiesChildChild, PreschoolFemaleHumansInfantInfant, NewbornLeukemia, Myeloid, AcuteMalePrecursor Cell Lymphoblastic Leukemia-LymphomaPregnancyPregnancy, High-RiskRisk AssessmentRisk FactorsConceptsBirth characteristicsPregnancy lossChildhood leukemiaOdds ratioNorthern California Childhood Leukemia StudyHistory of miscarriageConfidence intervalsRisk of AMLConditional logistic regressionDetailed reproductive historyCalifornia Childhood Leukemia StudyChildhood Leukemia StudyChildhood AMLIncident casesBirth weightMaternal historyIndex childReproductive historyBirth recordsLogistic regressionRecall biasBirth certificatesLeukemia StudyAMLLeukemia
2002
Critical windows of exposure to household pesticides and risk of childhood leukemia.
Ma X, Buffler PA, Gunier RB, Dahl G, Smith MT, Reinier K, Reynolds P. Critical windows of exposure to household pesticides and risk of childhood leukemia. Environmental Health Perspectives 2002, 110: 955-960. PMID: 12204832, PMCID: PMC1240997, DOI: 10.1289/ehp.02110955.Peer-Reviewed Original ResearchConceptsHigh riskChildhood leukemiaNorthern California Childhood Leukemia StudyPotential etiologic roleCalifornia Childhood Leukemia StudyHousehold pesticidesLocation of exposureChildhood Leukemia StudyHousehold pesticide exposureBirth RegistryControl subjectsEtiologic roleElevated riskSignificant associationLeukemiaPregnancyCritical windowLeukemia StudyLate exposureFrequent exposurePesticide exposureRiskExposureYear 2Year 1