These numbers carry a very high selection bias. At age you generally operate people who are already sick and about to die anyways. I don't know if we even have

These numbers carry a very high selection bias. At age you generally operate people who are already sick and about to die anyways. I don't know if we even have data to correct them for that to calculate the "Death rate of healthy people after anaesthesia" vs. "Death rate of healthy people of the same age group."