What this does, when you use relative risk you take some group of the population and you establish their risk as--at one.
当运用相对危险度这个概念时,要选定一个群组,并把这个群组的风险设为1
You'll see that concept of relative risk come up in subsequent classes.
以后的课上还会提到相对危险度这个概念
Relative risk of death is an interesting concept from public health.
死亡相对危险度是个源于公共健康的概念
And so you can see here now you're not just getting relative risks of two, three, or four but you're getting relative risk of a hundred, in this case, massively elevated risk.
可以看出,肥胖人群的患病风险不只高出了三四倍,而是上百倍,风险极大地提高了
If some group, let's say you have cholesterol of two hundred and your relative risk is established at one, and then if you have cholesterol two fifty your relative risk is two, that means you have twice the risk, so relative risk of two is twice the risk, three is three times the risk, etc.
比如说有一个组,胆固醇水平200,相对风险设为1,另一个组胆固醇水平是250,相对风险是2,即第二组的相对风险是参照组的两倍,相对风险是2代表两倍风险,3代表三倍风险,如此类推
You can see that when you get out to the highest groups here, the highest weights, the relative risk is up at two and a half or three, so that would be a 200% increase in risk for cardiovascular death or two to three times the risk of death.
当我们看图上相对风险最高的这组,也就是体重最大的这组,这组的相对风险大约是2.5倍到3倍,即心血管疾病致死的风险增加了200%,或者说增加了2到3倍
Now, here's the relative risk again over here on the y axis.
这张图中Y轴代表患病的相对危险度
In this case, death from heart disease and what you see here, and I'll tell you what relative risk is in just a minute, but this is basically risk for disease over on this axis and here its weight.
在这幅图里是心脏病致死的,我会简短地介绍一下相对风险的定义,Y轴表示患病风险,X轴表示体重
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