Hi,

I did a RCT-4 arms, so I have 4 different groups supplemented with different doses of a specific dietary treatment (including the Placebo).

I would like to see the dose-response relationship with e.g. blood pressure that is adjusted for baseline data. I know how to perform the analysis on SPSS on adjusted data, and its simply from contrast and choose polynomial. However, I don't how to plot it on SPSS, how can I use the adjusted data to do the plot?? Please advice if you have an idea.

I am using SPSS 24

Thanks