In the observational studies we found that some of the B vitamins were beneficial.
在观察性研究中，我们发现一些维生素B是有益的。
In many past observational studies, however, basic genetics or environmental factors could be blamed for this association.
但在以前的许多研究报告中，人们认为基因或环境因素是导致这种联系的元凶。
Multiple observational studies have shown that moderate alcohol consumption is associated with lower rates of cardiovascular events.
多重观察研究表明，适度饮酒能够降低患心血管疾病的几率。
These results are consistent with that of observational studies.
这些结果与观测研究的结果一致。
This supports the conclusions of observational studies and expert opinion.
这支持了观察性研究的结果和专家的论点。
This supports the conclusions of observational studies and expert opinion.
这支持了观察性研究的结论及专家的论点。
But these were mostly based on observational studies, which can be misleading.
不过这些结论大多都是在观察研究的基础上的，因而有可能产生误导。
Type 2 diabetes and cancer: umbrella review of meta-analyses of observational studies.
2型糖尿病和癌症的观察性研究的荟萃分析综述。
All of the studies identified were retrospective observational studies and of poor quality.
所有找到的研究都是回顾性的观察研究，且品质不良。
There was no predictive value of cholesterol, which is consistent with some observational studies.
胆固醇对寿命的影响无明确的预测值，这与一些研究一致。
She points to growing evidence from observational studies suggesting that early use cuts heart risk.
她指出越来越多的观察研究的证据表明早期采取激素替代疗法会降低心脏风险。
The results were consistent across experimental laboratory studies and correlational observational studies.
该结果与实验室研究和相关观察研究一致。
In the decades that followed, dozens of observational studies reported that breakfast eaters tended to be leaner.
在随后的几十年里，数十项观察性研究报告指出，吃早餐的人往往更瘦。
In the decades that followed, dozens of observational studies reported that breakfast eaters tended to be leaner.
在随后的几十年里，多项观察研究报告指出，吃早餐的人一般会更瘦一点。
There are multiple possible reasons for discrepant results between observational studies and large randomized trials.
导致观察性研究和大规模随机临床试验结果之间不一致的可能原因有多种。
Much of the evidence for coffee's health benefits stems from observational studies, which cannot prove cause and effect.
咖啡健康益处的很多证据来自观察性研究，不能证明因果关系。
Conclusions: Selenium concentrations were inversely associated with coronary heart disease risk in observational studies.
结论：观察性研究中硒浓度与冠心病危险度呈负相关。
Of 14 reviews included in this analysis, 11 (79%) found no significant difference between observational studies and RCTs.
在本次分析所纳入的14篇文献回顾中，有11篇(79%)文献回顾发现观察性试验和RCT并无显著差异。
Goldstein noted that data from observational studies have suggested that low cholesterol levels raise the risk of brain hemorrhage.
Goldstein医生注意到这些来自观测研究的数据显示：低胆固醇水平能增加脑出血的风险。
Objective to demonstrate, by case study, how to analyze the hospital data through the statistical methods in observational studies.
目的通过个案分析，说明如何采用观察性研究的方法对医院资料进行统计分析。
A debate over that question in a British scientific journal shows why some observational studies should be taken with a big shaker of salt.
英国一家科学期刊就这个问题展开了一场争论，从中我们可以看出某些观察性研究的结果不可轻信。
Because observational studies have provided misleading evidence for other antioxidants, the validity of this association is uncertain.
由于观察性研究为其他的抗氧化物提供了误导性证据，所以这种联系的可靠性还不明确。
There were also hints that aspirin may help prevent some cancers. But these were mostly based on observational studies, which can be misleading.
也有消息称阿司匹林还可预防某些癌症，但大多都是基于观测研究得来的，不可全信。
"All we know from observational studies is that people who have breakfast are leaner," he said. "But it may be other factors that are the reason."
“我们从观察研究中得知，吃早餐的人更瘦”，他说，“但可能是其他因素作用的结果”。
Even carefully constructed observational studies that correct for such variables can only find correlations, not prove a cause-and-effect relationship.
即便是那些精心设计、对这些变量已作调整的观察性研究也只能发现其中的相关性，而无法证实一种因果关系。
The link between smoking and cancer, for example, was seen in many observational studies, but forcing subjects to smoke for years to prove it would be untenable.
拿吸烟和肺癌之间关系的研究来说，许多观察性研究都发现了这一点，但要迫使研究对象吸烟多年来证明这一点恐怕是不可能的。
However, further observational studies with large databases assessing how interventions might modify the risk of stroke could provide more useful information.
然而，在大样本中进一步的观察研究，评估干预对中风风险的影响可以提供更多有用的信息。
We have more than 10 years of experience in medical research worldwide which include phase II - phase IV clinical trials and non-interventional observational studies.
我们有十多年的医学和临床研究经验，包括II- IV期临床试验和非干预观察性研究。
We have more than 10 years of experience in medical research worldwide which include phase II - phase IV clinical trials and non-interventional observational studies.
我们有十多年的医学和临床研究经验，包括II- IV期临床试验和非干预观察性研究。
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