Comparing the prognostic and predictive utility of serum thymidine kinase 1 and CA 15-3 in patients with hormone receptor positive metastatic breast cancer starting first-line endocrine therapy in SWOG S0226.
Cobain E, Barlow W, Paoletti C, Bergqvist M, Williams A, Ritzen H, Mehta R, Gralow J, Hortobagyi G, Albain K, Pusztai L, Sharma P, Godwin A, Thompson A, Hayes D, Rae J. Comparing the prognostic and predictive utility of serum thymidine kinase 1 and CA 15-3 in patients with hormone receptor positive metastatic breast cancer starting first-line endocrine therapy in SWOG S0226. Journal Of Clinical Oncology 2023, 41: 1076-1076. DOI: 10.1200/jco.2023.41.16_suppl.1076.Peer-Reviewed Original ResearchProgression-free survivalMetastatic breast cancerThymidine kinase 1 activityHormone receptor-positive metastatic breast cancerPositive metastatic breast cancerOverall survivalEndocrine therapyCA 15Breast cancerCA15-3Predictors of PFSFirst-line endocrine therapySubsequent progression-free survivalWorse progression-free survivalSerum thymidine kinase 1Systemic endocrine therapyMultivariable Cox modelCox regression analysisWorse overall survivalHypothesis-generating dataCycles of treatmentTamoxifen useSystemic therapySerum levelsMultivariable analysis