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| HER-2 overexpression and survival in colorectal cancer: a meta-analysis |
| Chao Li, Da-ren Liu, Long-yun Ye, Ling-na Huang, Sanjay Jaiswal, Xiao-wen Li, Hou-hong Wang, Li Chen |
| Department of Surgery, the Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310021, China |
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Abstract Objective: Numerous studies examining the relationship between human epidermal growth factor receptor 2 (HER-2) overexpression and survival in patients with colorectal cancer (CRC) have yielded controversial results. We therefore performed a meta-analysis more precisely to estimate its prognostic value. Methods: Published studies investigating the effect of HER-2 overexpression on CRC survival were identified; the hazard ratios (HRs) and their corresponding 95% confidence intervals (95% CIs) were pooled in terms of disease-specific or overall survival. Results: Eleven studies were included in the meta-analysis. The pooled data showed that HER-2 overexpression was negatively related to CRC survival (HR=1.10, 95% CI: 0.77–1.44). Subgroup analyses regarding test method and study quality also demonstrated little association between HER-2 overexpression and CRC survival (HR=0.89, 95% CI: 0.50–1.29; HR=0.90, 95% CI: 0.43–1.37, respectively). Conclusions: Regardless of several limitations, our study suggested that HER-2 overexpression probably had little impact on CRC survival.
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Received: 08 October 2013
Published: 07 June 2014
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