Differences Induced by Adding Covariates
Donald Klein writes:
Unfortunately, much of this is over my head. As a practicing trialist the apparent disagreements re managements of # of covariates in ANCOVA seems important but I can’t find a reference to an actual trial where these alternative analyses produced different results. Even a model trial would be helpful to show the import of these theoretical differences.
Similarly with regard to missing data , which turns the experimental randomization towards a naturalistic study.
Cordially,
Don Klein