topic How to generate a regression curve for a binary dependent variable in Statistical Procedures

How to generate a regression curve for a binary dependent variable

LiHZ — Wed, 27 Oct 2021 02:52:46 GMT

Hi everyone, Please bear with me.

I'm confused to finish this model alone.

There is a discrete independent variable and a binary dependent variable (percentage).

I can use proc glimmix to generate the figure below. But how can i generate a regression curve by Legendre polynomials like in the second figure?

sbxkoenk — Wed, 27 Oct 2021 11:17:03 GMT

Hello,

I think you can fit a spline if you just want to know about the overall "trend".

If you want Legendre (orthogonal) polynomials, they are in SAS/IML ORPOL Function.

Good luck,

Koen

StatDave — Wed, 27 Oct 2021 14:37:08 GMT

See this note that (in addition to estimating odds ratios) shows fitting a quadratic or spline model and producing a plot.

Rick_SAS — Wed, 27 Oct 2021 14:58:06 GMT

If you fit a curve, then you are assuming that the independent variable (group) is continuous. But you said it is discrete. So which is it?