Dear All,
When I designed the matrix consisted of two discrete groups, (patients vs. controls), I choose age as a covariate so during my analysis I was lookingif there is a difference in the cortical thickness within patients versus controls while accounting for age. Should I change my FSGD in order to be able to compare between patients and controls accounting for age (I want to make sure that the age does not confound my results). Please see attached my FSGD file.
Also, my question is how the clusters are created: the clusters formation is due to a similar value within cortical thickness(cortical thickness with similar values from patients and controls are grouped together in a cluster (e.g. cluster no.1) while other cortical thickness values are forming different clusters) or the clusters are formed based on age -age grouping (each subject belong to an age cluster)?
Thank you, AK