Hello!
I am currently doing an experiment where subjects are fed one of four diets every 24 hours over a 72 hour period. The survival of an individual is also being recorded at every 24 hours (0 as dead, 1 as alive). All subjects are weighed before and after being fed their respective diet, and the mass difference is the amount of food consumed (g).
What test would I run if I wanted to look at whether survival (binomial) can be predicted by treatment (categorical)? Also, should an ANCOVA be used to test if the amount of food consumed from the previous day(s) (0 and 24hr mass change) influences survival and food consumed for the next day (at 48hrs)?
You can use the logistic regression model to predict survival.
I do not quite agree with ANCOVA in this study.
I suggest using Repeated Measure instead.
You can do these analyzes with SPSS Software.
After all
I suggest doing a survival analysis using GraphPad Prism software and it will be interesting to estimate parameters such as Median survival and Hazard Ratio.
Abolfazl Ghoodjani, why is it necessary to use GraphPad Prism for survival analysis? SPSS also has procedures for survival analysis. E.g., here is a short tutorial:
https://www.sheffield.ac.uk/polopoly_fs/1.230028!/file/Survival_analysis_ME.pdf
Other resources can be found via Google--e.g., try a search on .
HTH.
Hello Bruce Weaver
necessary?!
I just wrote
"You can do these analyzes with SPSS Software"
"I suggest doing a survival analysis using GraphPad Prism software"
Why?
Because I think it is good in one study to try working with several software. Combining them gives interesting results. Of course, this is my opinion.
Respectfully.
Have a look!
https://www.spss-tutorials.com/spss-binomial-test/
Natalia Davila
Thank you for your inputs, everyone!
Abolfazl Ghoodjani In regard to the repeated measure analysis, would I include survival at the 24th, 48th, and 72nd
hour as between-subject factors? Or only the treatment?
Yes, you can put both treatment and Survival in between-subject.
As you say, In fact, the study will be two-way RM.
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