Investigating the effect of two covariates to an estimated parameter

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

Answer 1

[Arthur Goldsipe]

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.

[Day]

Thank you very much