Ecological study - Wikipedia
Ecological studies are particularly useful for generating hypotheses since they can use existing data sets and rapidly test the hypothesis. The advantages of the ecological studies include the large number of people that can be included in the study and the large number of risk-modifying factors that can be examined.
Ecologic studies in epidemiology: concepts, principles, and ... - PubMed
An ecologic study focuses on the comparison of groups, rather than individuals; thus, individual-level data are missing on the joint distribution of variables within groups. Variables in an ecologic analysis may be aggregate measures, environmental measures, or global measures.
生态学研究 - 百度百科
生态趋势研究 (ecological trend study) 是连续观察一个或者多个人群中某因素平均暴露水平的改变和(或)某种疾病的发病率、死亡率变化的关系，了解其 变动趋势 ；通过比较暴露水平变化前后疾病频率的变化情况，来判断某因素与某疾病的联系。
Chapter 6. Ecological studies - The BMJ
In ecological studies the unit of observation is the population or community. Disease rates and exposures are measured in each of a series of populations and their relation is examined. Often the information about disease and exposure is abstracted from published statistics and therefore does not require expensive or time consuming data collection.
Ecological Studies (Correlational Studies) - Boston University …
2020年9月10日 · Ecologic studies assesses the overall frequency of disease in a series of populations and looks for a correlation with the average exposure in the populations. These studies are unique in that the analysis is not based on data on individuals.
Ecological Study - an overview | ScienceDirect Topics
An ecological study is defined as a type of group-based study that compares the mean values of exposures and outcomes of different population groups, providing important insights for population health monitoring and hypothesis generation in social sciences.
《流行病学大讲堂》第十二讲：描述性研究（四）生态学研究
2019年4月10日 · 生态学研究（ecological study）又称相关性研究（correlational study），是描述性研究中的一种，是以群体为基本单位收集和分析资料，在群体的水平上描述不同人群中某因素的暴露状…
Ecological Study - an overview | ScienceDirect Topics
An ecological study is an observational study that is characterized by trying to relate exposure and disease at the region and population level, rather than at the individual level. Ecological studies are often used to measure prevalence and incidence of disease, particularly when disease is rare.
An ecological study is an observational study defined by the level at which data are analysed, namely at the population or group level, rather than individual level....
Ecology can be defined as the study of ecological systems. A system is any set of components, living or nonliving, that are tied together by regular interactions. An ecological system is made up of one or more organ-isms, together with the nonliving environment with which they interact.
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