Hi all,
I am doing a prospective observational study where I have two groups of subjects (drug and no drug) and they are being assessed on a continuous variable outcome measure.
It is also known that age affects this outcome. Unfortunately, due to the observational nature of the study, there is a significant difference in age between the two groups.
At first I thought I could use an ANCOVA approach, adjusting for age. However, after doing some research, it appears to me that an ANCOVA would only be appropriate if there were wide age ranges within both my groups, but not between groups (and thus the ANCOVA would help clean up the variability).
Can anyone please point me in the right direction I should be going to adjust/correct for this difference in age? I really appreciate it.
-Mike