中文摘要：

研究目的：探讨人类表皮生长因子受体2（HER-2）的高表达与结直肠癌患者术后生存期的关系。创新要点：采用meta分析的方法，精确地探讨HER-2高表达与结直肠癌患者生存期的关系，解决不同研究产生不同结论的矛盾。研究方法：系统收集近20年来所有与HER-2表达和结直肠癌生存期关系相关文献，提取数据并计算与癌症或总体生存时间对应的危险比及其95％可信区间。重要结论：HER-2高表达可能与结直肠癌患者术后生存时间无关（见图2）。

英文摘要：

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% Cls） 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% Ch 0.43-1.37, respectively）, Conclusions： Regardless of several limitations, our study suggested that HER-2 overexpression probably had little impact on CRC survival.