How to Read the Endpoints in a Healthy Aging Trial

Healthy aging is an aim, not a measurement

A trial can be described as a healthy aging study while measuring many different things: physical function, a disease outcome, a laboratory signal or a participant's reported experience. The broad aim does not tell you which of those changed. Start with the endpoint, meaning the outcome the study uses to evaluate its question.

NIA's clinical research areas include work on longevity, maintenance of health and measures such as biomarkers and function. That breadth is a reminder to read beyond the label. An intervention that changes a blood measure has demonstrated something different from one that reduces a clinically meaningful event. Neither result should be rewritten as proof of a longer healthy life unless the study actually supports that statement. The endpoint is the bridge between the experiment and the claim.