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Openai/695f02d3-11f8-800e-993a-ad71db6d42aa
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==== While median survival times might be reported (e.g., OS ~12.6 vs. 8 months), the hazard ratio does not come directly from those medians. Rather: ==== * The Cox model uses all survival times and censoring information across both groups. * The hazard ratio is an overall measure of relative risk over time, not a simple ratio of medians. wiki.socr.umich.edu<ref>{{cite web|title=wiki.socr.umich.edu|url=https://wiki.socr.umich.edu/index.php/SMHS_SurvivalAnalysis|publisher=wiki.socr.umich.edu|access-date=2026-01-10}}</ref> If you do convert medians into an approximate HR under simple exponential assumptions, there are formulas β but this is not how the final HR is usually derived in modern trials.
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