Sure you can. Take side of the family you take after the most. Look at all the males from the past 3 generations. Find the average and standard deviation of the age at death. Calculate the expected lifetime +/- 2SD. Assume PED use is no different that what your male relative risks were. For me thats 67 +/- 26. So I should either be dead 15 years ago or I have 37 years left.
In mathematical terms you are fucked or you are not.
Simple math