It seems important to age adjust these rates as disability increases with age. So phd students are young and comparing their rate of disability to the entire po

It seems important to age adjust these rates as disability increases with age. So phd students are young and comparing their rate of disability to the entire population doesn’t seem very useful. It also seems difficult to compare the rate of disabled biologists with the overall populations as many disabled people don’t work at all and would not consider biology or any profession. So of course the rate would be lower than the population.