Dear all,

I would like to run the basic command for the meta-analysis as follow:

```
plink --meta-analysis study1.assoc study2.assoc
```

PLINK will search the header row for the columns:

- SNP SNP idenitifier
- OR Odds ratio (or BETA, etc)
- SE Standard error of OR (or user-defined weight field)
- P (Optional) p-value from test

My problem is that file 2 (`study2.assoc`

) does not contain SE (standard error) numbers. File `study2.assoc`

contains three columns named SNP, OR and P. Is there a way to calculate the SE based on these three columns? The three columns is the only information that I have.

I hope that someone can help me with this problem!

Groetjes Lisanne