mTNBC is a condition with significant unmet medical need due to limited treatment (tx) options and short survival after chemotherapy (chemo) failure. Tx patterns and OS in patients (pts) with mTNBC in US clinical practice were assessed.
This retrospective chart review study used data collected in October and November 2016 from US oncologists via an online case report form. Data of adult pts who were initiated on a pharmacological tx after a diagnosis of recurrent or de novo mTNBC between January 2012 and June 2015 were reviewed. Tx regimens used in 1st- and 2nd-lines for mTNBC were summarized. Median OS from 1st- and 2nd-line tx initiation were estimated using Kaplan-Meier analyses.
125 oncologists provided data on 411 mTNBC pts; mean age was 57 years; 298 (73%) had ≥2 lines of tx; 256 different tx sequences were identified. Mean duration of tx was 7.5 months (mos) in 1st-line and 7.3 mos in 2nd-line. The most prevalent tx regimens were single agent chemo with taxane (22%) in 1st-line and capecitabine (Cap; 20%) in 2nd-line. Median OS was 16.7 mos in 1st-line and 14.2 mos in 2nd-line.Table:
|1st-line, N = 411||%||Median OS [95% CI], mos|
|All||-||16.7 [15.2; 18.0]|
|Single agent||45||15.6 [13.2; 18.6]|
|Combination||55||17.0 [15.1; 19.1]|
|Single agent taxane (docetaxel/paclitaxel (pac)/nab-pac)||22||–|
|Anthracycline (ATC; doxorubicin [Dox]/epirubicin/liposomal Dox) + cyclophosphamide +/- taxane||14||–|
|Platinum (carboplatin/cisplatin/oxaliplatin) + taxane||13||–|
|Gemcitabine (Gem) + platinum||10||–|
|2nd-line, N = 298|
|All||-||14.2 [10.5; 22.3]|
|Single agent||72||12.9 [10.5; 22.3]|
|Combination||28||16.2 [8.1; -]|
|Platinum-containing (w/o taxane)||13||–|
|Single agent taxane||13||–|
|ATC-containing (w/o taxane or platinum)||8||–|
Findings suggest that, in US clinical practice, there is substantial heterogeneity in the tx of pts with mTNBC. Pts had a median OS
Clinical trial identification
Legal entity responsible for the study
P. Bajaj, C. Reyes, A. Stein, P. Cortazar: Employee of Genentech, Inc. and owner of Roche stock. D. Latremouille-Viau, A. Guerin: Employee of Analysis Group, Inc., which has received consulting fees and research funding from Genentech, Inc. All other authors have declared no conflicts of interest.