I have two datasets from genome-wide association studies. The only information available are the odd ratios and their confidence intervals (95%) for each genotyped SNP. My want to generate a forest plot comparing these two odds ratios, but I can't find the way to calculate the combined confidence intervals to visualize the summary effects. I used the program PLINK to perform the meta-analysis using fixed effects, but the program did not show these confidence intervals.
- How can I calculate such confidence intervals?
The data available is:
- Odd ratios for each study,
- 95% confidence intervals and
- Standard errors.