I am conducting a meta-analysis of Hazard Ratios (HR), however, most of the studies presented only Kaplan Meier curves without the HR and Confidence Intervals (CI). I am extracting data manually from the curves and using Tierney et al. spreadsheet to calculate the HR. Nevertheless, I am concerned about the reliability of this method.
I have already tried some programs to extract numerical data from the curves, but none of them presented the number of censored patients at each time point to calculate the number of patients at risk.
Do you know any program/software able to do this? Or any that gives the HR and CI?
Thank you!
Shady Abohashem
You probably need to run COX, KM can just give a close estimates from the curve itself
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