Hi All, I'm hoping that someone can help me out with the below.
I'm doing some analyses on a dataset of individuals who have/had cancer, looking at the association between smoking status and the number of years since the cancer diagnosis. I have three levels of smoking status (current, former, never) and four levels of time since cancer diagnosis (1-5, 6-10, 11-20, 21+ years ago). My goal is to determine the percentage (and 95% CI) of individuals who are current vs. former vs. never smokers within each of the four time since diagnosis groups. That's simple enough (I can do it by looking at frequency crosstabs), but I want to run the analysis while holding age constant (since it is related to the time since diagnosis). I don't have a large enough sample size to run the analysis stratified by age group, so I want to partial out age. What is the best way to do that? Thank you in advance. Elliot Elliot Coups, Ph.D. Research Fellow Department of Psychiatry and Behavioral Sciences Memorial Sloan-Kettering Cancer Center . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
