I try to use proc glimmix to model the relationship of one dependent variable and one independent variable with restricted cubic splines (RANGEFRACTIONS(0.05 0.275 0.5 0.725 0.95)). The dependent variable is one repeated continuous outcome. From previous posts, I understand it is not intuitive when we would display the effect of an independent variable with restricted cubic splines through parameters estimated by regression on one dependent variable. Are there any online experts who can offer advice on presenting such a relationship?
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