What is the main idea of the news item? [originaltext] "Evidence-based medici

"Evidence-based medicine" means just what it says—treatments that have been shown in scientific studies to work. But studies are one thing—do these treatments work as well in real-world clinics and hospitals? A new study in Sweden found that they do.
    Researchers at Karolinska Hospital in Stockholm analyzed a government registry of more than 60,000 patients with a particular type of very serious heart attack. These patients were treated between 1996 and 2007, a time of increasing sophistication in caring for heart attack victims.
    Lead author Tomas Jernberg says studies began showing benefit from simple things like taking aspirin to advanced, high-tech therapies like bypass surgery.
    So did all these new evidence-based strategies work?
    Jernberg says the answer became clear as hospitals gradually adopted proven therapies.
    One measure of mortality is the 30-day death rate, the percentage of patients who died in the first month after having these very serious heart attacks. Although use of the various evidence-based treatments increased over the 12-year span in this study, it never reached 100 percent because not all treatments are appropriate for every patient’s individual situation.
    There was also a lot of variation in the speed at which hospitals began using many of the newer therapies, and the authors suggest that adopting evidenced-based treatments faster could help improve patient outcomes sooner.