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  • Health-related quality of life and colorectal cancer-specific symptoms in patients with chemotherapy-refractory metastatic disease treated with panitumumab

Health-related quality of life and colorectal cancer-specific symptoms in patients with chemotherapy-refractory metastatic disease treated with panitumumab

Odom, D., Barber, B., Bennett, T., Peeters, M., Zhao, Z., Kaye, J., Wolf, M., & Wiezorek, J. (2011). Health-related quality of life and colorectal cancer-specific symptoms in patients with chemotherapy-refractory metastatic disease treated with panitumumab. International Journal of Colorectal Disease, 26(2), 173-181.

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Abstract

PURPOSE: Panitumumab monotherapy is approved for chemotherapy-refractory wild-type KRAS metastatic colorectal cancer (mCRC). Patient-reported outcomes-although important in the palliative setting-have not been reported in this patient population. METHODS: In a phase 3 trial (n = 463), patients with chemotherapy-refractory mCRC were randomized 1:1 to panitumumab plus best supportive care (BSC) or BSC alone. Patient-reported outcomes were assessed using the NCCN/FACT CRC Symptom Index (FCSI) and EQ-5D Index. KRAS tumor status was analyzed in a prospectively defined, retrospective analysis. Average difference in change from baseline between treatment groups was evaluated using linear mixed and pattern-mixture models. RESULTS: KRAS tumor status and post-baseline patient-reported outcomes were available for 363 patients. Linear mixed models indicated significant differences in the FCSI score (difference in least-squares [LS] adjusted means [95% CI]; 5.62 [2.38, 8.86]) and the EQ-5D Index (difference in LS adjusted means [95% CI]; 0.22 [0.12, 0.32]) favoring panitumumab over BSC in patients with wild-type KRAS mCRC. By pattern-mixture analysis, the advantage of panitumumab over BSC was more pronounced in those patients with wild-type KRAS mCRC who did not drop out of the study early. In patients with mutant KRAS mCRC, no differences were observed between groups. CONCLUSIONS: Panitumumab-treated patients with wild-type KRAS mCRC maintained better control of CRC symptoms and quality of life compared with BSC alone, extending our understanding of the benefits of panitumumab treatment beyond improvements in progression-free survival

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