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Ｍｅｔａ－分析是对具有相同研究目的的多个独立研究结果进行系统合并和综合分析的一种研究方法［１］。Ｍｅｔａ－分析最初应用于教育学、心理学等社会科学领域［２］，７０年代引入到医学领域，８０年代后期取得了很大进展，由仅应用于临床随机试验发展到可用于任何试验研究
Meta-analysis is a method of systematic and comprehensive analysis of multiple independent studies with the same research purpose [1]. Meta-analysis was first applied to social sciences such as pedagogy and psychology [2]. In the 1970s, it was introduced to the field of medicine and great progress was made in the late 1980s. It has been applied to any experimental research since it was applied only to clinical randomized trials