Patient and public involvement (PPI) is recognised as a valuable tool in improving the quality and relevance of research. Defined as "research being carried out "with" or "by" members of the public rather than "to", "about" or "for" them", PPI is a method of involving patients and the public in the design, conduct and dissemination of research and services that affect them, providing for a more democratic approach and patient empowerment.

Source:

Journal of Epidemiology and Community Health