Conversion from low vs. high to high vs. los (Relative Risk)

#1
Hi :)

I'm writing my bachelorthesis about the effects of physical activity in prevention. Most of the studies I included compared high physical activity with low physical activity (as reference category) but a few did it the other way round and compared low physical activity with high physical activity as reference category.
I would like to visualize the results as Forest Plots and therefore I wanted to ask if there is a recognized possibility to convert the relative risk.
Unfortunately, I could not find anything on my internet search, therefore I would be very grateful for your support! :)

Best,
Marlene
 

hlsmith

Not a robit
#2
Odds ratios are invertible but relative risks are not. Unless they provide the prevances for all of the groups, nope.Even then you cannot compare them between studies unless RR modelled same in each study. Meaning they all controlled for same covariates or no covariates.

good luck!