plan specification Study Primary Purpose The main objective of the intervention(s) being evaluated by the clinical trial. Study Primary Purpose The principal reason or intention for the execution of an interventional or non-interventional clinical study. CDISC The principal reason or intention for the execution of an interventional or non-interventional clinical study. (NCI) Idea or Concept C147141 CL545057 Study Primary Purpose http://www.icmje.org/recommendations/ http://www.who.int/ictrp/network/trds/en/index.html