Physical function and quality of life in frail and/or elderly metastatic colorectal cancer patients treated with bevacizumab and capecitabine: An exploratory analysis.
627 Background: Optimal treatment strategies in frail and/or elderly patients with metastatic colorectal cancer have not been well defined. Although the safety and efficacy of bevacizumab and capecitabine in this population has been reported, the impact on functional measures and quality of life has not been well described. In a prospective, phase II study of elderly metastatic colorectal patients with ECOG performance status (PS) 1 or 2 treated with first-line bevacizumab and capecitabine, we collected data on geriatric functional status and quality of life. The primary aim of this analysis was to explore the differences in geriatric health measures between patients with ECOG status 1 and 2. Methods: Functional status was measured by patient-reported limitations in ADLs and IADLs and ECOG PS was assessed. A “Get up and Go” test, hearing test, and 3-item recall exam was also performed. Quality of life (QoL) was assessed by means of the FACT-C questionnaire and patient-rated health status was measured by the EQ-5D questionnaire. The prognostic impact of baseline characteristics on survival was studied using univariate Cox-regression analysis. Results: The majority (62%) of the 45 participants treated were ECOG 2. This group had more limitations in IADLs, lower baseline QoL, and a lower patient-rated health score. For all participants, QoL significantly improved from baseline to the start of cycle 2 (FACT-C: 99.9 vs. 105.4, p=0.01) and did not deteriorate when baseline scores were compared to when participants went off study. (FACT-C: 99.9 vs. 98.6, p=0.59). In the Cox-regression analysis, the participant’s ability to perform the “Get up and Go” test was the only baseline characteristic that was prognostic for improved survival (HR = 0.31, p = 0.01). Conclusions: Our analysis shows that in this study of frail and/or elderly patients with metastatic colorectal cancer treated with bevacizumab and capecitabine, there is a significant amount of heterogeneity between the ECOG 1 and 2 groups in both functional measures and quality of life. We also showed that the “Get up and Go” test may be a useful prognostic indicator for survival in this population.