Hi Statalist members,

I am planning to do a meta-analysis to find out the odds of having oral cancer with binge drinking, compared to cigarette use.
Currently, many epidemiological studies, however, do not compare them directly. Instead, these studies usually compared binge drinkers vs no substance users and cigarette smokers vs no substance users. So, the odds ratios of oral cancer currently reported in studies are:
- (A) Binge drinkers vs. (B) no substance user, and
- (C) Cigarette smokers vs. (B) no substance user
Can I estimate the odds ratio of developing oral cancer of (A) binge drinkers, compared to (C) cigarette smokers?
I am not aware of any Stata commands that can do this.
Any help would be greatly appreciated. Thank you very much!