<prompt> Following can be used as a yardstick for the assessment of standards of therapy ?Specific death rateCase fatality ratePropoional moality rateSurvival rate  <response>: Ans. is d i.e., Survival rate Survival rate o It is the propoion of survivors in a group e.g. of patients studied and followed over a period of time. o It is a method of describing prognosis in ceain disease conditions. o Survival experience can be used as a yardstick for the assessment of standard of therapy. o Survival rates have received special attention in cancer studies. 