2019
Radiation therapy treatment facility and overall survival in the adjuvant setting for locally advanced head and neck squamous cell carcinoma
Lee NCJ, Kelly JR, An Y, Park HS, Judson BL, Burtness BA, Husain ZA. Radiation therapy treatment facility and overall survival in the adjuvant setting for locally advanced head and neck squamous cell carcinoma. Cancer 2019, 125: 2018-2026. PMID: 30748002, PMCID: PMC6541535, DOI: 10.1002/cncr.32001.Peer-Reviewed Original ResearchConceptsHigh-volume surgical facilitiesPostoperative radiation therapyNeck squamous cell carcinomaSquamous cell carcinomaOverall survivalSurvival benefitCell carcinomaSurgical facilitiesPropensity score-matched cohortAnnual case volumeDefinitive surgeryAdvanced headOS improvementImproved outcomesRadiation therapyCase volumeOral cavityPatientsReduced hazardMultivariate analysisSurgeryInvasive HNSCCCarcinomaSurvivalTreatment
2016
Postoperative Radiotherapy Patterns of Care and Survival Implications for Medulloblastoma in Young Children
Kann BH, Park HS, Lester-Coll NH, Yeboa DN, Benitez V, Khan AJ, Bindra RS, Marks AM, Roberts KB. Postoperative Radiotherapy Patterns of Care and Survival Implications for Medulloblastoma in Young Children. JAMA Oncology 2016, 2: 1574-1581. PMID: 27491009, DOI: 10.1001/jamaoncol.2016.2547.Peer-Reviewed Original ResearchConceptsPostoperative radiotherapyOverall survivalMultivariable logistic regressionNational Cancer Data BaseLogistic regressionAdjuvant chemotherapy strategyLow facility volumeNational treatment patternsMultivariable Cox regressionLong-term morbidityYear of diagnosisDay of surgeryKaplan-Meier analysisNational database analysisPoor overall survivalLog-rank testYoung childrenAge 3Adjuvant chemotherapyRadiotherapy patternsRadiotherapy utilizationWorse survivalDistant metastasisMultivariable analysisTreatment patterns
2012
Immortal Time Bias: A Frequently Unrecognized Threat to Validity in the Evaluation of Postoperative Radiotherapy
Park HS, Gross CP, Makarov DV, Yu JB. Immortal Time Bias: A Frequently Unrecognized Threat to Validity in the Evaluation of Postoperative Radiotherapy. International Journal Of Radiation Oncology • Biology • Physics 2012, 83: 1365-1373. PMID: 22342097, DOI: 10.1016/j.ijrobp.2011.10.025.Peer-Reviewed Original ResearchConceptsSequential landmark analysesPostoperative radiotherapyImmortal time biasLandmark analysisTumor typesEnd Results (SEER) databaseObservational cohort studyTime biasObservation cohortCohort studyHazard ratioProspective trialImproved survivalResults databaseConditional survivalRoutine useSurvivalApparent benefitRadiotherapyCohort