Around 45 million Americans are likely to have a routine physical this year — just as they have for many years running. A poke here, a listen there, a few tubes of blood, maybe an X-ray, a few reassuring words about diet, exercise and not smoking from the doctor, all just to be sure everything is in good working order. Most think of it as the human equivalent of a 15,000-mile checkup and fluid change, which can uncover hidden problems and ensure longer engine life.
There is only one problem: From a health perspective, the annual physical exam is basically worthless.