To someone who could help me:
I am a PhD student, working in the Wageningen University, the
Netherlands. I am now using metafor package to do meta-analysis.
Since there are few studies conducted on my topic, I have to combine the
results from 5 case-control studies and 1 cohort study. But I do not
know how to do it.
I tried this way, first, use the escalc (measure="OR", ai, bi, ci, gi)
to calculate the effect estimate of yi and variance of vi.
I could extract the RR and 95% confidence interval from the cohort study
to get the point estimate of LnRR and SE.
but I can not combine the results from case-control study and the
results from cohort study due to the difference of vi and SE.
For example, if I use rma(yi, vi, data,), I can not get vi (variance)
for the cohort study. I can only get SE for cohort study. How could
solve it?
Thanks for your time.
Best wishes,
Yingchang (Kevin) Lu
PhD student,
Division of Human Nutrition
Wageningen University
Tel: 0031-317-485300
Fax:0031-317-482782
[[alternative HTML version deleted]]
_______________________________________________
R-sig-Epi@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-sig-epi
