epidemiological studies

基本解释

But epidemiological studies have found no higher prevalence of GI problems among children with PDD compared to normally developing children.
但是，流行病学研究发现，pdd孩子和正常孩子相比较并没有更高的胃肠道患病率。
To date, epidemiological studies have not found an association between radon in drinking water and cancer of the digestive and other systems.
迄今开展的流行病学研究未发现饮用水中的氡与消化系统及其它系统的癌症之间有联系。
Scientific evidence on the distribution of cancer in the population can be obtained through carefully planned and executed epidemiological studies.
通过慎重计划和开展的流行病学研究，可获得关于癌症在人群中分布情况的科学依据。

"Now,with large epidemiological studies done everywhere including here, we can say with a great level of confidence that the disease affects roughly the same percentage of the general public worldwide.
Hope Ferdowsian of the Physicians Committee says "For example,in HIV research, we've learned a lot from human epidemiological studies and ethically conducted clinical trials."

The first clinical and epidemiological studies linking cigarette-smoking and lung cancer were published only in 1950.
ECONOMIST: Tobacco
The manufacturer says it's working on two epidemiological studies, but wouldn't give further details.
NPR: FDA Orders Label For Contraceptive Patch