Prior to the 20 th Century, one of the most common ways of seeing the world was through the lens of stratification, which is the idea that the natural world comes in different scales or layers.

The Clinical Frailty Scale (CFS) was introduced in the second clinical examination ... and has been widely taken up as a judgement-based tool to screen for frailty and to broadly stratify degrees of ...

A logistic regression model was then used to create a risk stratification scale for SAEs based on the significant history, examination and lab findings. Ten of these variables were included in the ...