<prompt> All are true of standardised moality ratio exceptExpressed as rate per ratecan be adjusted for agecan be used for events other than deathRatio of observed deaths to expected deaths  <response>: ref: Park;s 23rd edition pg 58 it is expressed as a ratio usually in percentage SMR is a ratio of the total number of deaths that occur in a study group to the number of deaths that would have been expected to occur if that study group had experienced the death rates of a standard population or reference population. 