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J Clin Oncol. 2009 Jan 10;27(2):199-205. doi: 10.1200/JCO.2008.17.7931. Epub 2008 Dec 8.

Addition of bevacizumab to fluorouracil-based first-line treatment of metastatic colorectal cancer: pooled analysis of cohorts of older patients from two randomized clinical trials.

Author information

1
Department of Medicine, Division of Hematology & Oncology, University of California at Los Angeles, 2333D PVUB MC 705907, 10945 Le Conte Ave, Los Angeles, CA 90095-7059, USA. fkabbina@mednet.ucla.edu

Abstract

PURPOSE:

Colorectal cancer (CRC) occurs predominantly in older persons. To provide more statistical power to assess risk/benefit in older patients, we examined the clinical benefit of bevacizumab (BV) plus fluorouracil-based chemotherapy in first-line metastatic CRC (mCRC) treatment in patients aged > or = 65 years, using data pooled from two placebo-controlled studies.

PATIENTS AND METHODS:

Pooled efficacy data for 439 patients > or = 65 years old randomized to BV plus chemotherapy (n = 218) or placebo plus chemotherapy (n = 221) in study 1 and study 2 were retrospectively analyzed on an intent-to-treat basis for overall survival (OS), progression-free survival (PFS), and objective response. Safety analysis was based on reports of targeted adverse events in treated patients.

RESULTS:

Median OS with BV plus chemotherapy was 19.3 v 14.3 months with placebo plus chemotherapy (hazard ratio [HR] = 0.70; 95% CI, 0.55 to 0.90; P = .006). Patients treated with BV plus chemotherapy had a median PFS of 9.2 v 6.2 months for placebo plus chemotherapy patients (HR = 0.52; 95% CI, 0.40 to 0.67; P < .0001). The objective response rate was 34.4% with BV plus chemotherapy versus 29.0% with placebo plus chemotherapy (difference not statistically significant). Rates of BV-associated adverse events in the pooled BV plus chemotherapy group were consistent with those reported in the overall populations for the two studies.

CONCLUSION:

Analysis of pooled patient cohorts age >/= 65 years from two similar trials in mCRC indicates that adding bevacizumab to fluorouracil-based chemotherapy improved OS and PFS, similar to the benefits in younger patients. Also, the risks of treatment do not seem to exceed those in younger patients with mCRC.

PMID:
19064978
DOI:
10.1200/JCO.2008.17.7931
[Indexed for MEDLINE]
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