2023
Indirect treatment comparison of first-line CDK4/6-inhibitors in post-menopausal patients with HR+/HER2- metastatic breast cancer.
Zhao J, Fong K, Chan Y, Tey J, Dawood S, Lee S, Finn R, Sundar R, Lim J. Indirect treatment comparison of first-line CDK4/6-inhibitors in post-menopausal patients with HR+/HER2- metastatic breast cancer. Journal Of Clinical Oncology 2023, 41: 1071-1071. DOI: 10.1200/jco.2023.41.16_suppl.1071.Peer-Reviewed Original ResearchProgression-free survivalPost-menopausal patientsIndirect treatment comparisonCDK4/6 inhibitorsPALOMA-2MONARCH 3OS differenceOverall survivalAromatase inhibitorsPatient-level time-to-event dataEndpoint of progression-free survivalFirst-line aromatase inhibitorsProgression-free survival differenceHR+/HER2- metastatic breast cancerHormone receptor positive (HR+)/human epidermal growth factor receptor 2Epidermal growth factor receptor 2Progression-free survival curvesPhase III randomized controlled trialsCDK4/6 inhibitor palbociclibMetastatic breast cancerPhase III studyKaplan-Meier OSCox proportional hazards modelsProportional hazards modelTreatment comparisonsClinical relevance of PD-1 positive CD8 T-cells in gastric cancer
Choo J, Kua L, Soe M, Asuncion B, Tan B, Teo C, Tay R, So J, Shabbir A, Guowei K, Tan H, Chan G, Ma H, Ramachandran G, Lum J, Chee C, Sridharan S, Tan P, Sundar R, Yong W. Clinical relevance of PD-1 positive CD8 T-cells in gastric cancer. Gastric Cancer 2023, 26: 393-404. PMID: 36781556, PMCID: PMC10115710, DOI: 10.1007/s10120-023-01364-7.Peer-Reviewed Original ResearchConceptsCD8 T cellsPD-1+CD8+ T cellsT cellsTumor microenvironmentPD-1Overall survivalGastric cancerMultiplex immunohistochemistryT cell-inflamed tumor microenvironmentAssociated with improved OSIncreased PD-1 expressionClinical relevanceGranzyme-B expressionInflamed tumor microenvironmentPD-1 expressionInfluence overall survivalNK cell proportionTreated with immunotherapyPhase 2 trialAssociated with chemotherapyCox proportional hazards modelsProportional hazards modelImproved OSImmunotherapy sensitivityNK cells
2022
KMSubtraction: reconstruction of unreported subgroup survival data utilizing published Kaplan-Meier survival curves
Zhao J, Syn N, Tan B, Yap D, Teo C, Chan Y, Sundar R. KMSubtraction: reconstruction of unreported subgroup survival data utilizing published Kaplan-Meier survival curves. BMC Medical Research Methodology 2022, 22: 93. PMID: 35369867, PMCID: PMC8978435, DOI: 10.1186/s12874-022-01567-z.Peer-Reviewed Original ResearchConceptsMonte Carlo simulationsLimits of errorSubgroup survival dataCarlo simulationsSurvival dataKaplan-MeierKaplan-Meier survival curvesExtensive Monte Carlo simulationsOriginal survival dataFollow-up timeCox proportional hazards modelsSubgroups of clinical interestPublished Kaplan-Meier survival curvesMarginal Cox proportional hazards modelsProportional hazards modelMatched patientsSecondary data analysisSystematic errorsSurvival curvesProportion of missing dataHazards modelClinical interestPatientsPrimary manuscriptsKM plots