Peter Ellis, MD, MPH
Cards
About
Research
Publications
2025
Cost Disparities with Age in the Treatment of Advanced Non-Small-Cell Lung Cancer (NSCLC) in Ontario, Canada
Wang Y, Pond G, Gafni A, Kong C, Ellis P. Cost Disparities with Age in the Treatment of Advanced Non-Small-Cell Lung Cancer (NSCLC) in Ontario, Canada. Current Oncology 2025, 32: 346. PMID: 40558289, PMCID: PMC12191781, DOI: 10.3390/curroncol32060346.Peer-Reviewed Original ResearchConceptsCancer-attributable costsPhase of careNon-small-cell lung cancerAdvanced non-small-cell lung cancerInstitute for Clinical Evaluative SciencesHealthcare costsEnd-of-lifePre-diagnosis costsCost disparityEnd-of-life phaseDiagnosis of advanced non-small-cell lung cancerStage IV non-small-cell lung cancerTreatment of advanced non-small-cell lung cancerIV non-small-cell lung cancerRetrospective cohort studyLung cancerEvaluative SciencesPre-DiagnosisCancer diagnosisCohort studyOlder patientsDeceased patientsCareReceiving chemotherapyMedian agePerioperative toripalimab and chemotherapy in resectable non-small cell lung cancer: another weapon in the armamentarium
Coschi C, Ellis P. Perioperative toripalimab and chemotherapy in resectable non-small cell lung cancer: another weapon in the armamentarium. Journal Of Thoracic Disease 2025, 17: 3472-3477. PMID: 40529735, PMCID: PMC12170031, DOI: 10.21037/jtd-2025-91.Peer-Reviewed Original ResearchExploring Nursing and Medical Students’ Experiences of Handling Challenging Conversations: A Qualitative Focus Group Study
Natuhwera G, Ellis P, Namisango E. Exploring Nursing and Medical Students’ Experiences of Handling Challenging Conversations: A Qualitative Focus Group Study. Advances In Medical Education And Practice 2025, 16: 773-787. PMID: 40356868, PMCID: PMC12067464, DOI: 10.2147/amep.s518988.Peer-Reviewed Original ResearchMedical students' experiencesAudio-recorded focus group interviewsQualitative focus group studyMedical studentsPatient-clinician encountersCommunicating bad newsExploratory qualitative studyFocus group studyFocus group interviewsSimulation-based learningMedical training schoolsQualified nursesUndergraduate nursesCare settingsFace-to-faceConvenience sampleNursesThematic analysisQualitative studyClinical exposureInadequate trainingGroup interviewsMedical doctorsBad newsCentral UgandaUse of broad-spectrum antibiotics in adult cancer patients presenting to emergency department with non-neutropenic fever and/or suspected infection
Li Y, Al Maqrashi Z, Zhan L, Siddiqui Z, Jin E, Ellis P. Use of broad-spectrum antibiotics in adult cancer patients presenting to emergency department with non-neutropenic fever and/or suspected infection. Supportive Care In Cancer 2025, 33: 383. PMID: 40237926, DOI: 10.1007/s00520-025-09419-4.Peer-Reviewed Original ResearchConceptsNon-neutropenic feverBroad-spectrum antibioticsBroad-spectrum intravenous antibioticsBroad-spectrum antibiotic useCancer patientsSuspected infectionAdult cancer patientsAntibiotic useIntravenous antibioticsEmergency departmentAntibiotics prescribed to patientsMethodsA retrospective cohort studySingle-center studyProportion of patientsRetrospective cohort studyStage IV cancerMultivariate logistic regressionImprove antibiotic stewardshipSystemic treatmentSolid malignanciesGenitourinary cancersAdult patientsAntibiotic stewardshipIV cancerCohort studySystematic Review for the Follow-up of Curatively Treated Patients With Lung Cancer
Shargall Y, Vella E, Del Giudice M, Dennie C, Ellis P, Kulkarni S, MacRae R, Ung Y. Systematic Review for the Follow-up of Curatively Treated Patients With Lung Cancer. Clinical Lung Cancer 2025, 26: e327-e341. PMID: 40240202, DOI: 10.1016/j.cllc.2025.03.003.Peer-Reviewed Original ResearchConceptsSmoking cessation interventionsPatient-reported outcome toolsPatient-reported outcomesRandomized Controlled TrialsCessation interventionsSystematic reviewOntario Health (Cancer Care OntarioNurse-led interventionRisk factorsClinical practice guidelinesQuality of lifeExercise trainingFollow-upManagement of signsCurative-intent treatmentPractice guidelinesControlled TrialsTarget populationCochrane LibraryFollow-up strategiesInterventionLung cancerSymptoms of recurrencePatient populationFollow-up of patientsThe Impact of Chronic Pelvic Pain and Bowel Morbidity on Quality of Life in Cervical Cancer Patients Treated With Radio (Chemo) Therapy. A Systematic Literature Review
Natuhwera G, Ellis P. The Impact of Chronic Pelvic Pain and Bowel Morbidity on Quality of Life in Cervical Cancer Patients Treated With Radio (Chemo) Therapy. A Systematic Literature Review. Journal Of Pain Research 2025, 18: 597-618. PMID: 39931424, PMCID: PMC11809231, DOI: 10.2147/jpr.s501378.Peer-Reviewed Original ResearchChronic pelvic painQuality-of-lifePelvic painBowel morbidityQuality of lifeRadio-chemotherapyPeer-reviewed research evidenceAdverse eventsImpact of chronic pelvic painQuality-of-life of womenCervical cancer patients treated with radiotherapyCancer patients treated with radiotherapyPatients treated with radiotherapyManagement of symptomsTreated with radiotherapyRandomised controlled trialsPeriod of follow-upCervical cancer patientsGold standard treatmentStructured checklistPopulation-basedPelvic radiotherapyChemoradiation therapyPalliative intentRetrospective studyKnowledge, Self-Efficacy, and Correlates in Palliative and End-of-Life Care: Quantitative Insights from Final-Year Nursing and Medical Students in a Mixed-Methods Study
Natuhwera G, Namisango E, Ellis P. Knowledge, Self-Efficacy, and Correlates in Palliative and End-of-Life Care: Quantitative Insights from Final-Year Nursing and Medical Students in a Mixed-Methods Study. Palliative Care And Social Practice 2025, 19: 26323524251316901. PMID: 39926421, PMCID: PMC11803644, DOI: 10.1177/26323524251316901.Peer-Reviewed Original ResearchEnd-of-life careEnd-of-lifePalliative Care Self-Efficacy ScaleMedical students' knowledgeSelf-Efficacy ScaleSelf-EfficacyUndergraduate nursesPalliative and end-of-life careParticipants' knowledgePrinciples of palliative careMedical studentsPalliative care curriculumPalliative Care QuizPalliative care teachingLower self-efficacy scoresStudents' knowledgeSelf-efficacy scoresPredictors of knowledgeInsufficient self-efficacyMixed-methods studyManagement of painNursing QuestionnairePalliative careCare scoresNursing schools
2024
Systemic Therapy for Small Cell Lung Cancer: ASCO Guideline Rapid Recommendation Update
Kalemkerian G, Khurshid H, Ismaila N, Khurshid H, Ismaila N, Bian J, Dabney R, Das M, Ellis P, Feldman J, Hann C, Kulkarni S, Laskin J, Manochakian R, Mishra D, Preeshagul I, Reddy P, Saxena A, Weinberg F, Kalemkerian G. Systemic Therapy for Small Cell Lung Cancer: ASCO Guideline Rapid Recommendation Update. Journal Of Clinical Oncology 2024, 43: 101-105. PMID: 39565968, DOI: 10.1200/jco-24-02245.Peer-Reviewed Original ResearchConceptsGuideline development processSmall cell lung cancerPractice-changing dataCell lung cancerCare optionsRecommendation updatesEvidence reviewHealth practitionersGuideline recommendationsSystemic therapyIndependent professional judgmentLung cancerASCOCancerProfessional judgmentGuidelinesRecommendationsUpdate on Practical Management of Early-Stage Non-Small Cell Lung Cancer (NSCLC): A Report from the Ontario Forum
Cheema P, Wheatley-Price P, Cecchini M, Ellis P, Louie A, Moore S, Sheffield B, Spicer J, Villeneuve P, Leighl N. Update on Practical Management of Early-Stage Non-Small Cell Lung Cancer (NSCLC): A Report from the Ontario Forum. Current Oncology 2024, 31: 6979-6999. PMID: 39590145, PMCID: PMC11592966, DOI: 10.3390/curroncol31110514.Peer-Reviewed Original ResearchNon-small cell lung cancerEarly-stage non-small cell lung cancerImmune checkpoint inhibitorsCell lung cancerLung cancerManagement of early-stage non-small cell lung cancerPre-meeting surveyTreatment approachesReview practice patternsAdjuvant settingCheckpoint inhibitorsRadiation therapyOntario cancer centersTargeted therapySurgical considerationsTreatment algorithmReview recent dataClinical dataBiomarker testingCancer CenterTherapeutic strategiesPractice patternsCancerTherapyPatientsGrowth differentiation factor 15 (GDF15) predicts relapse free and overall survival in unresected locally advanced non-small cell lung cancer treated with chemoradiotherapy
Di Pastena F, Pond G, Tsakiridis E, Gouveia A, Ahmadi E, Biziotis O, Ali A, Swaminath A, Okawara G, Ellis P, Abdulkarim B, Ahmed N, Robinson A, Roa W, Valdes M, Kavsak P, Wierzbicki M, Wright J, Steinberg G, Tsakiridis T. Growth differentiation factor 15 (GDF15) predicts relapse free and overall survival in unresected locally advanced non-small cell lung cancer treated with chemoradiotherapy. Radiation Oncology 2024, 19: 155. PMID: 39511611, PMCID: PMC11542377, DOI: 10.1186/s13014-024-02546-y.Peer-Reviewed Original ResearchConceptsLocally advanced non-small cell lung cancerAdvanced non-small cell lung cancerNon-small cell lung cancerCell lung cancerOverall survivalDifferentiation factor 15GDF15 levelsLA-NSCLCTumor volumeSurvival outcomesUnresectable locally advanced non-small cell lung cancerLung cancerPhase II randomized clinical trialConcurrent chest radiotherapyIncreased GDF15 levelsUnresectable LA-NSCLCTreated with chemoradiotherapyGross target volumeGrowth differentiation factor 15Platinum-based chemotherapyPlasma GDF15 levelsRandomized to treatmentLevels of GDF15Patient blood plasmaRandomized clinical trials
Academic Achievements & Community Involvement
Clinical Care
Overview
Peter J. Ellis, MD, provides primary care to adult patients, including preventive care and management of acute and chronic illnesses. “I am inspired by my patients who have serious medical issues that they bravely address,” says Dr. Ellis. “As privileged witness to their life stories, I try to share their valuable perspectives and lessons they have learned with other patients facing similar challenges.”
Dr. Ellis specializes in managing complex medical problems, including psychosocial needs, for his patients. He is president of the board of directors for Project Access New Haven, a nonprofit organization that offers free medical care to uninsured residents with urgent medical needs. The program, which Dr. Ellis helped create in New Haven after launching Project Access in Waterbury in 2004, brings together more than 300 physician volunteers and hooks patients up with navigators who can help identify and remove barriers to care.
“At Yale we have lots of medical resources and specialists at our disposal. My job is both to provide direct care and to guide and coordinate care provided by specialists,” Dr. Ellis says. “I am excited by the prospect of developing a patient-centered medical home that encourages patients to communicate more often and engage in healthy behaviors outside the traditional annual office visit.”
Clinical Specialties
Yale Medicine News
News & Links
News
- June 02, 2025
Primary Care & Psychiatry Clerkship Honors Excellent Community Physician Teachers
- February 18, 2025
Voluntary Faculty Awards Honor Outstanding Educators
- January 06, 2025
New Professors in the Department of Internal Medicine
- February 14, 2024
Yale Faculty Honored at Inaugural Voluntary Faculty Awards
Get In Touch
Contacts
General Internal Medicine
PO Box 208056, 333 Cedar Street
New Haven, CT 06520-8056
United States
Locations
Patient Care Locations
Are You a Patient? View this doctor's clinical profile on the Yale Medicine website for information about the services we offer and making an appointment.