Perform MR using summary statistics. Bootstraps used to calculate standard error.

mr_simple_median(
b_exp,
b_out,
se_exp,
se_out,
parameters = default_parameters()
)

## Arguments

b_exp Vector of genetic effects on exposure. Vector of genetic effects on outcome. Standard errors of genetic effects on exposure. Standard errors of genetic effects on outcome. The number of bootstrap replications used to calculate the SE can be set through parameters=list(nboot = 1000). The default is list(nboot=1000).

## Value

List with the following elements:

b

MR estimate

se

Standard error

pval

p-value

nsnp

The number of SNPs