(END-point) In a clinical trial an endpoint is an event or outcome that can be measured objectively to determine whether the treatment being studied is working. Examples of endpoints include survival, tumor regression and relief of symptoms.
the criterion or criteria used to judge the results of an intervention or action. Primary endpoints are the explicit variables that define the relationship being hypothesized. Secondary endpoints are measures that may result from the research or be defined by the research that are not related directly to the question(s) being studied.
Measurable ecological or toxicological characteristic or parameter of the test system (usually an organism) that is chosen as the most relevant assessment criterion (e.g. death in an acute test or tumour incidence in a chronic study).