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overall survival time (oh-ver-AWL ser-VY-vul …)

The length of time a person lives after being diagnosed with a life-threatening disease, such
as cancer, until death from any cause. In a randomized clinical trial, overall survival time may
be measured from the time a person is assigned to treatment instead of the time of diagnosis.
Measuring differences in overall survival time between groups of patients receiving different
treatments in a clinical trial is one way to see if one treatment works better than another. Also
called OS and overall survival.

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