Investigating the effect of two covariates to an estimated parameter

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Day
Day 2024-9-27
评论： Day 2024-9-28
Hi,
I have data for different patients and I want to investigate the effect of two covariates to an estimated parameter while I am fiting its value for individual patients. Am I able to to the fitting with two covariates? How this equation will be changed: exp(theta + theta1*covariate1 + eta)?
Thanks

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Arthur Goldsipe
Arthur Goldsipe 2024-9-27
Yes, you can specify multiple covariates. An example covariate expresssion would be exp(theta_fixed + theta1*covariate1 + theta2*covariate2 + eta1). You might also want to look at this example, which investigates which covariates should be incorporated into a covariate model.

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