### load BCG vaccine data
data(dat.bcg)
### meta-analysis of the log relative risks using a mixed-effects model
### with two moderators (absolute latitude and publication year)
res <- rma(ai=tpos, bi=tneg, ci=cpos, di=cneg, mods = ~ ablat + year,
data=dat.bcg, measure="RR", method="REML")
fitted(res)
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