It wasn't actually a study itself on the Mediterranean Diet, but it was a review of other studies that had been done using this statistical technique called meta-analysis.

该研究本身并不直接研究地中海式饮食法,而是运用荟萃分析的统计方法,对其它已有的相关研究进行研究

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选