Bevacizumab combined with first-line chemotherapy in elderly patients (≥75 years old) with metastatic colorectal cancer: Final results of the noninterventional CASSIOPEE study.
3547 Background: Approximately half of the patients (pts) with metastatic colorectal cancer (mCRC) are elderly (≥65 years). Although few elderly pts are included in clinical studies, results in mCRC have shown similar treatment benefits in terms of progression-free survival and overall survival in young and elderly pts. This study was conducted in pts ≥75 years-old with mCRC treated in real life 1st line bevacizumab + chemotherapy in order to improve the knowledge on this population and to contribute in optimizing treatment strategy. Methods: CASSIOPEE is a prospective, multicenter, non-interventional study evaluating 1st line combination of bev + chemotherapy over 24 months in pts aged ≥75 years with mCRC. The primary endpoint was to describe progression-free survival (PFS). Secondary endpoints included the description of pts characteristics, overall survival, bev and chemotherapy regimen, safety and autonomy criteria (Lawton Instrumental Activities of Daily Living Scale; Balducci score). Results: A total of 402 pts were included between March 2012 and July 2016. In the efficacy population (n = 358), 52% were men, mean age 81 (±4); 54% were≥ 80 years old and 19% were ECOG ≥2; 80% had primary tumor located in the colon; main metastatic sites: liver (66%) and lung (30%). Bev was mainly combined with Folfox (36%) and Folfiri (29%). Median PFS was 9.1 months [8.3;10.2] in the efficacy population and 9.3 months for pts aged < 80, 9.5 months for pts aged ≥ 80 or ≤ 85 and 8.3 months for pts aged > 85. The PFS rate at 24 months was 11.8%. Median OS was 19.0 months [16.5;21.5] in the efficacy population and 20.6 months for pts aged < 80, 17.8 months for pts aged ≥ 80 or ≤ 85 and 13.0 months for pts aged > 85. The OS rate at 24 months was 42.0%. Autonomy and ECOG status remained stable from baseline to 24 months. In the safety population (n = 383), grade ≥ 3 adverse events occurred in 40% pts including 10% pts with bev related AEs. Overall, 4% pts died of an AE and 0.5% were bev related. Conclusions: These results suggest that mCRC patients aged ≥75 years-old, can benefit from 1st line bev plus chemotherapy in daily practice in this population. The safety profile is acceptable. Clinical trial information: NCT01555762.