<prompt> The following can be used as a yardstick for the assessment of standards of therapy?Specific death rateCase fatality ratePropotional moality rateSurvival rate  <response>: ref: Parks 23rd edition pg 58 It is the propoion of survivors in a group eg: patients studied and followed over a period. the survival period is usually reckoned from the date of diagnosis or the sta of treatment. mostly applied in cancer studies. 