Separate names with a comma.
Discussion in 'Step I' started by Toroloco, May 4, 2004.
What is the formula for Reference Interval?
and Case Fatality Risk?
The risk from dying from a specific disease is described in the CFR
Case Fatality Rate = total death from disease "x" within a specified time after diagnosis / total# people acquiring disease "x"
The reference interval is used when a certain measurement on a patient is compared with the values for that measurement in a normal population. I don't believe there is a certain formula but I could be wrong.
Thanks Doreen for your fast answer
Well I have a formula but I'm not really sure if it is right or not.
In fact they give you a mean and 1 SD and they ask you to calculate Ref interval Well I guess is mean +/- 2 X SEM
and SEM = SD/square root of population.
Please someone tells me if I'm wrong.
Try this site which is an extract from "An Introduction to Medical Statistics" by Martin Bland. It gives an example on how to calculate.
Che, gracias Doreen por el dato