Can I pool relative risk data that are given for different definitions of high vs low ?
Data extraction tips for meta-analysis

Here's a tip...
Applying another trend estimation approach can help you pool relative risks for high vs low categories
To find out more, download the pdf
Dr Kathy Taylor teaches data extraction in Meta-analysis. This is a short course that is also available as part of our MSc in Evidence-Based Health Care, MSc in EBHC Medical Statistics, and MSc in EBHC Systematic Reviews.
Follow updates on this blog and related news, and to find out about other examples of statistics being made more broadly accessible on Twitter @dataextips