But meta analyses found no impact on your cancer risk.

但是荟萃分析发现对您的癌症风险没有影响。

One meta analysis looked at 21 studies and the effect of acute and longterm cardiovascular intervention or exercise, on human memory.

一项荟萃分析考察了 21 项研究以及急性和长期心血管干预或运动对人类记忆的影响。

One meta analysis that riled people up in recent years even suggested that antidepressants are no better than a placebo in those cases.

近年来激怒人们的一项荟萃​​分析甚至表明，在这些情况下，抗抑郁药并不比安慰剂好。

Some older studies found a connection between milk and a high risk of breast, colon, and prostate cancer, but meta analyses found no impact on your cancer risk.

一些较早的研究发现牛奶与乳腺癌，结肠癌和前列腺癌的高风险之间存在联系，但是综合分析发现，它并不会增加患癌风险。

In 2015, a meta analysis, a study of studies, found this pattern across thousands of studies following over 14 million twin pairs across 39 countries.

2015 年， 一项荟萃分析， 一项对研究的研究，在对 39 个国家超过 1400 万对双胞胎的数千项研究中发现了这种模式。

One is my research group has looked at all the research over the last 12 years going back to 2006 and done what's called a meta analysis where we look at every study.

其中之一是我的研究小组研究了自 2006 年以来过去 12 年的所有研究，并进行了所谓的荟萃分析，即我们研究了每一项研究。

And once enough researchers have run their own RCTs, you can gather data via meta analysis, measuring results across multiple trials to see basically whether a treatment works, and how well it does, across a variety of settings.

一旦足够多的研究人员运行了他们自己的随机对照试验，您就可以通过荟萃分析收集数据， 测量多个试验的结果， 以从根本上了解一种治疗是否有效，以及它在各种情况下的效果如何。

A meta analysis combining the data of 16 studies and over 1 million subjects found that compared to adults who sleep the normal seven to eight hours, those who slept less than seven hours a night had a 12% greater risk of death.

一个结合了16项研究和超过100万名受试者数据的荟萃分析发现，与睡眠时间一般为7到8小时的成年人相比，那些每晚睡眠时间少于7个小时的成年人的死亡风险高出12％。