The proportion of the world population aged 60 years or over is expected to increase from 12 % in 2013 to 21 % in 2050 [
1]. This increase will represent more than 2 billion elders, including 400 million aged 80 years or over. As the population ages, intensive care units (ICU) are facing an increasing demand for care of the elderly [
2], with patients aged 80 or over now representing 10–20 % of all ICU admissions. …