Outcome measures

In most trials there are several measures of treatment efficacy or impact of potential interest, and it may be appropriate that all are recorded. Examples commonly used in cancer trials are shown below. It is important to note that all of these examples can potentially be considered as 'time-to-event' data with patients not having the event being censored at the date last seen. This maybe useful to remember when attempting to assess the impact of a treatment in a setting where prolongation of a particular state (e.g. complete response) maybe as important, or more realistic, than a long-term increase or decrease in the proportion of patients achieving that state.

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