Efficacy and Safety of Bevacizumab Combined With First-Line Chemotherapy in Elderly (≥75 Years) Patients With Metastatic Colorectal Cancer: A Real-World Study

Clin Colorectal Cancer. 2020 Sep;19(3):e100-e109. doi: 10.1016/j.clcc.2020.02.009. Epub 2020 Apr 13.

Abstract

Background: Although elderly patients are the first concerned by colorectal cancer (CRC), they are underrepresented in clinical trials. The real-world CASSIOPEE study was thus conducted in elderly patients treated for metastatic CRC (mCRC).

Methods: This French prospective, multicenter, noninterventional study aimed to estimate 1-year progression-free survival (PFS) and overall survival (OS), and describe treatments, patient autonomy (Instrumental Activities of Daily Living; Balducci scale), and safety over 24 months, in patients older than 75 with mCRC, starting first-line bevacizumab plus chemotherapy (NCT01555762).

Results: From 2012 to 2014, 402 patients were included (safety population: n = 383, efficacy population: n = 358). Patient characteristics were as follows: mean age, 81 ± 4 years (<80 years, 46%; 80-85 years, 44%; >85 years, 10%); men, 52%; colon primary tumor, 80%; main metastatic site, liver 66%; Eastern Cooperative Oncology Group performance 0-1, 81%. Median PFS was 9.1 months (95% confidence interval [CI]: 8.3-10.2). It was superior for patients ≤85 years (<80 years: 9.3 months; 80-85 years: 9.5 months) compared with patients >85 years (8.3 months). Median OS was 19.0 months (95% CI, 16.5-21.5) and decreased in the 2 oldest groups (20.6, 17.8, and 13.0 months). Autonomy assessments decreased over time leading to nonconclusive results. Twenty-six percent of patients experienced serious adverse events (SAEs): 7% bevacizumab-related SAEs, and 6% bevacizumab-targeted SAEs. Two fatal bevacizumab-related adverse events were reported (hemorrhagic stroke and intestinal ischemia).

Conclusions: This large French real-world study showed that medically fit older patients with mCRC could have a benefit/risk balance similar to that of younger patients when treated with first-line bevacizumab plus chemotherapy. Improvements in geriatric assessments are needed to better define this population.

Keywords: Aged; Bevacizumab; Colorectal neoplasms; Neoplasm metastasis; Observational study.

Publication types

  • Multicenter Study
  • Observational Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Age Factors
  • Aged
  • Aged, 80 and over
  • Antineoplastic Combined Chemotherapy Protocols / administration & dosage*
  • Antineoplastic Combined Chemotherapy Protocols / adverse effects
  • Bevacizumab / administration & dosage*
  • Bevacizumab / adverse effects
  • Colorectal Neoplasms / drug therapy*
  • Colorectal Neoplasms / mortality
  • Colorectal Neoplasms / pathology
  • Female
  • France / epidemiology
  • Geriatric Assessment / statistics & numerical data
  • Hemorrhagic Stroke / chemically induced
  • Hemorrhagic Stroke / epidemiology
  • Hemorrhagic Stroke / prevention & control
  • Humans
  • Male
  • Mesenteric Ischemia / chemically induced
  • Mesenteric Ischemia / epidemiology
  • Mesenteric Ischemia / prevention & control
  • Progression-Free Survival
  • Prospective Studies

Substances

  • Bevacizumab

Associated data

  • ClinicalTrials.gov/NCT01555762