Not to mention that years of potential life lost is tricky to define, and the method in vogue isn't very good: take all the people with a condition, filter that

Not to mention that years of potential life lost is tricky to define, and the method in vogue isn't very good: take all the people with a condition, filter that group down to those who died before age X, and the years of potential life lost is the difference between X and the ages of death. Funnily enough, this method says the name "John" is a condition which reduces your expected lifespan. The method can be improved, but after a certain point it's just a bad imitation of relative survival.