For example, a trend in U.S. health care in recent years has been to promote early and frequent screening for diseases. While screening is generally helpful, it also exposes people to radiation. And too much radiation can cause health problems. In many of the other countries studied, including Canada, France, and Sweden, to name a few, everyone has health insurance. And there’s less emphasis on CAT scans and screenings. To be clear, the study doesn’t say that U.S. life expectancy is decreasing. In fact, it’s increasing. But it’s not quite keeping pace with gains in many other countries.