Treatment patterns and overall survival in HER2+ metastatic breast cancer at US community oncology practices

2021 ◽  
Author(s):  
Gregory A Vidal ◽  
Santosh Gautam ◽  
Anna Vlahiotis ◽  
Maxine D Fisher ◽  
Sonia Pulgar ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Overall Survival ◽  
Metastatic Breast Cancer ◽  
Real World ◽  
Metastatic Breast ◽  
Standard Of Care ◽  
Treatment Patterns ◽  
Adult Women ◽  
Community Oncology

Aim: To describe real-world treatment patterns/outcomes among patients with HER2+ metastatic breast cancer (MBC). Materials & methods: Real-world treatments and overall survival (OS) were evaluated among adult women diagnosed with HER2+ MBC, with and without brain metastases (BMs), between June 1, 2012 and May 31, 2018 using electronic medical records from the Definitive Oncology Dataset. Results: Among 372 patients, 69% initiated first-line trastuzumab plus pertuzumab-based therapy; many therapy combinations were utilized in the second- to fourth-line. During follow-up (median 24.8 months), 18% of patients died (22% with and 16% without BMs). Mean OS was shortest among patients with BMs at MBC diagnosis in the third- and fourth-line. Conclusion: OS was poor, and no clear standard of care was observed among patients with HER2+ MBC progressing on trastuzumab-based therapies.

Real-world starting dose and outcomes of palbociclib plus an aromatase inhibitor for metastatic breast cancer.

2021 ◽  
Vol 39 (15_suppl) ◽  
pp. e13021-e13021
Author(s):  
Debra A. Patt ◽  
Xianchen Liu ◽  
Benjamin Li ◽  
Lynn McRoy ◽  
Rachel M. Layman ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Metastatic Breast Cancer ◽  
Aromatase Inhibitor ◽  
Real World ◽  
Metastatic Breast ◽  
Routine Practice ◽  
First Line ◽  
Starting Dose ◽  
The Us

e13021 Background: Palbociclib (PA) has been approved for HR+/HER2–advanced/metastatic breast cancer (mBC) in combination with an aromatase inhibitor (AI) or fulvestrant for more than 6 years. Regardless of the labeled recommended starting dose of 125mg/day, some patients initiate palbociclib at lower doses in routine practice. This study described real-world starting dose, patient characteristics, and effectiveness outcomes of first line PA+ AI for mBC in the US clinical setting. Methods: We conducted a retrospective analysis of Flatiron Health’s nationwide longitudinal electronic health records, which came from over 280 cancer clinics representing more than 2.2 million actively treated cancer patients in the US. Between February 2015 and September 2018, 813 HR+/HER2– mBC women initiated PA+AI as first-line therapy and had ≥ 3 months of potential follow-up. Patients were followed from start of PA+AI to December 2018, death, or last visit, whichever came first. Real-world progression-free survival (rwPFS) was defined as the time from the start of PA+AI to death or disease progression. Real-world tumor response (rwTR) was assessed based on the treating clinician’s assessment of radiologic evidence for change in burden of disease over the course of treatment. Multivariate analyses were performed to adjust for demographic and clinical characteristics. Results: Of 813 eligible patients, 68.3% were white, median age was 65.0 years, and 42.9% had visceral disease (lung and/or liver). Median duration of follow-up was 21.0 months. 805 patients had records of PA starting dose, with 125mg and 75/100mg/day being 86.5% and 13.5%, respectively. Patients who started at 75/100mg/day were more likely to be ≥75 years than those who started at 125mg/day (38.5% vs 17.1%). Other baseline and disease characteristics were generally evenly distributed. Patients who started at 125mg/day had longer median rwPFS (27.8 vs 18.6 months, adjusted HR=0.74, 95%CI=0.52-1.05) and higher rwTR (54.0% vs. 40.4%) than those patients who started 100/75mg/day (adjusted OR=1.76, 95%CI=1.13-2.74). Table presents results in detail. Conclusions: Most patients in this study initiated palbociclib at 125mg/day and dose adjustment was similar regardless of starting dose. These real-world findings may support initiation of palbociclib at a dose of 125mg/day in combination with AI for the first-line treatment of HR+/HER2- mBC. [Table: see text]

scholarly journals Treatment patterns and clinical outcomes with palbociclib-based therapy received in US community oncology practices

2020 ◽  
Author(s):  
Junji Lin ◽  
Lynn McRoy ◽  
Maxine D Fisher ◽  
Nan Hu ◽  
Cralen Davis ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Clinical Outcomes ◽  
Real World ◽  
Medical Records ◽  
Metastatic Breast ◽  
Patient Characteristics ◽  
Treatment Patterns ◽  
Community Oncology ◽  
Label Indication ◽  
Free Rate

Background: Limited studies have evaluated palbociclib-based therapy use in patients with advanced/metastatic breast cancer in the real world. This retrospective study used medical records from US community oncology practices to address the gap. Materials & methods: Eligible patients receiving palbociclib-based therapy per label indication from 3 February 2015 to 31 December 2017 were included. Descriptive analyses were conducted for patient characteristics, treatment patterns and clinical outcomes. Results: The study included 233 patients who received palbociclib + aromatase inhibitor (P+AI) and 48 who received palbociclib + fulvestrant (P+F). Real-world progression-free rate for P+AI was 69.8% (46.8%) at 12 (24) months (P+F: 43.5% [39.9%]) months. Real-world survival rate was 89.8% (71.4%) at 12 (24) months (P+F: 76.3% [65.0%]). Conclusion: The study findings are consistent with previous studies of palbociclib-based therapy.

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