The randomised controlled trial: a critique.

Traditionally, health care has been based on historical legacy, personal treatment preferences and ritual. Indeed in the present day, some health professionals persist not only in practising clinical interventions that are known to be ineffective, but also fail to introduce others that tire known to have good outcomes, resulting in inescapably huge variations in practice and treatments ( 1 ).

RCT Entities:   Population Interventions Outcomes