Almost every time someone wants to proclaim the US to be the “best in the world” in health care, they point to survival rates. Those refer to the percent of people who live a certain amount of time after they’ve been diagnosed with a disease. But there are real problems in using survival rates to compare the quality of care across systems. The metric people should be using is mortality rates. And when we compare mortality rates, we don’t look nearly as good. Why is this important? Glad you asked.