For example, if one group contains more older patients or more who are seriously ill, the outcome may be influenced by those differences rather than by the treatment itself.
Four years ago, a staff member would rather have resigned than be the one to tell the boss about the ill-timed release of the videotapes made of Clinton's coffees with big-money donors.
Currently, health care systems focus primarily on chronic ill health, rather than the preventative measures of living a healthy lifestyle, but this may be the adjustment that both the health care system and insurance companies make as a result of digital health devices.