the walking test

A new analysis of walking speed
an older person’s pace, along with their age and gender, can predict their life expectancy just as well as the complex battery of other health details.

So instead of a doctor assessing a patient’s blood pressure, body mass index, chronic conditions, hospitalization history, smoking history and use of mobility aids to estimate survival, a lab assistant could simply time the patient walking a few meters and come up with just as accurate of a prediction of their likelihood of living five or 10 more years—as well as a median life expectancy.