Zachary Alholm1, Ding He2, Jie Ting3, Yitong J Zhang3, Lavanya Sudharshan2, Traci Leong2, Robert L Coleman4, Bradley J Monk5. 1. University of Arizona-Phoenix, Department of Obstetrics and Gynecology, Phoenix, AZ, United States of America. 2. Ontada, The Woodlands, TX, United States of America. 3. Seagen Inc., Bothell, WA, United States of America. 4. US Oncology Research, Texas Oncology, The Woodlands, TX, United States of America. 5. US Oncology Network (Arizona Oncology), University of Arizona College of Medicine, Creighton University School of Medicine, Phoenix, AZ, United States of America. Electronic address: bmonk@gog.org.
Abstract
OBJECTIVE: Understanding real-world treatment patterns and proportions of eligible patients in each line of treatment is imperative to inform future clinical trial designs and multi-line treatment algorithm development. METHODS: We conducted a retrospective observational cohort study of adult women who received first-line (1 L) therapy for r/mCC between 01 September 2014 and 31 December 2019, using The US Oncology Network electronic health records and chart review data. Patients were followed to 31 December 2020. Patient demographic and clinical characteristics, treatment patterns, and clinical outcomes were assessed descriptively. RESULTS: A total of 262 patients with r/mCC met study inclusion criteria (mean age = 53 years). The majority of patients in 1 L received platinum-based chemotherapy doublet plus bevacizumab (66%) or chemotherapy doublet alone (24%). Nearly half the patients (48%) completing 1 L received 2 L therapy. Among these patients, there was no consistent 2 L treatment of choice. Overall median time to treatment discontinuation was 3.5 months from 1 L treatment initiation, and median overall treatment-free interval was 2.1 months from 1 L discontinuation. Besides elevated serum creatinine, abnormal BMI indicated a directional trend for lower likelihood of receiving 2 L. Other predictors may include no prior bevacizumab, worse ECOG, and earlier disease prevention. CONCLUSIONS: >50% of the patients who initiated 1 L treatment did not receive 2 L therapy, highlighting the need for novel and effective treatment options. As the treatment landscape continues to evolve, we anticipate that more patients will live longer with more treatment options across multiple lines of therapies in the r/mCC setting.
OBJECTIVE: Understanding real-world treatment patterns and proportions of eligible patients in each line of treatment is imperative to inform future clinical trial designs and multi-line treatment algorithm development. METHODS: We conducted a retrospective observational cohort study of adult women who received first-line (1 L) therapy for r/mCC between 01 September 2014 and 31 December 2019, using The US Oncology Network electronic health records and chart review data. Patients were followed to 31 December 2020. Patient demographic and clinical characteristics, treatment patterns, and clinical outcomes were assessed descriptively. RESULTS: A total of 262 patients with r/mCC met study inclusion criteria (mean age = 53 years). The majority of patients in 1 L received platinum-based chemotherapy doublet plus bevacizumab (66%) or chemotherapy doublet alone (24%). Nearly half the patients (48%) completing 1 L received 2 L therapy. Among these patients, there was no consistent 2 L treatment of choice. Overall median time to treatment discontinuation was 3.5 months from 1 L treatment initiation, and median overall treatment-free interval was 2.1 months from 1 L discontinuation. Besides elevated serum creatinine, abnormal BMI indicated a directional trend for lower likelihood of receiving 2 L. Other predictors may include no prior bevacizumab, worse ECOG, and earlier disease prevention. CONCLUSIONS: >50% of the patients who initiated 1 L treatment did not receive 2 L therapy, highlighting the need for novel and effective treatment options. As the treatment landscape continues to evolve, we anticipate that more patients will live longer with more treatment options across multiple lines of therapies in the r/mCC setting.