According to Reuters, physicians often base treatments on expert opinion or anecdotal evidence. Only one in seven treatment recommendations from the Infectious Diseases Society of America (IDSA) — a society representing healthcare providers and researchers across the country — were based on high-quality data from clinical trials. This is based on a study published Monday in the Archives of Internal Medicine, based on over 4,200 recommendations between 1994 and 2010. [Link to Reuters Article]