Comparative Effectiveness Research (CER) is a large part of the Affordable Care Act. As its name implies, CER compares clinical regimens to determine whether the prescribed treatment or diagnostic protocol is actually better than alternatives. Outcomes of CER not only lead to better care for patients, but also, more stream-lined services at healthcare centers.
To understand how CER is conducted, check out the Agency for Health Care Quality and Research (AHRQ) website. Several weeks ago, they posted methods for creating your own Comparative Effectiveness Reviews, as well as presentation slides on several CE topics, like this one on the diagnosis and treatment of obstructive sleep apnea in adults.