Displaying 3 results from an estimated 3 matches for "dlduncan2".
2012 Apr 02
7
Calculating NOEL using R and logistic regression - Toxicology
Hello, I used the glm function in R to fit a dose-response relationship and
then have been using dose.p to calculate the LC50, however I would like to
calculate the NOEL (no observed effect level), ie the lowest dose above
which responses start occurring. Does anyone know how to do this?
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2012 Apr 03
0
Off Topic: Re: Calculating NOEL using R and logistic regression - Toxicology
Below.
-- Bert
On Tue, Apr 3, 2012 at 1:47 PM, Danielle Duncan <dlduncan2 at alaska.edu> wrote:
> Thanks for the response, I should have clarified that the NOEL is the
> smallest dose above which there is a statistically significant effect.
>
This is not a scientifically meaningful nor defensible definition as
it is stochastic, depends on the test used, desig...
2011 Dec 04
1
Logistic Regression with genetic component
Greetings, I have a question that I'd like to get input on. I have a
classic toxicology study where I artificially fertilized and exposed
embryos to a chemical and counted defects. In addition, I kept track of
male-female pairs that I used to artificially fertilize and generate
embryos with. I need to use logistic regression to model the response, but
also check that the genetics of the