How is trial data analysed/evaluated?

Data analysis is complex but may be used to show, for example, survival data. For clinical trials into potentially fatal diseases, eg cancer, the main evaluation of patient outcome is whether the patient dies or not, and the time from entry into the trial until death. Alternatively, patient outcome may be the time to some other measure of patient relapse, ie disease recurrence. According to the specific requirements of the trial protocol, both interim and final analysis may be carried out.

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