22. What if the data I want are reported for the wrong time point?
Data extraction tips for meta-analysis - tip 22
There are equations that you can use to calculate summary data for change from baseline and the values at the end of the trial when other timepoint data are reported.
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.