<prompt> True regarding mortality rate:Little important information about changing pattern of diseaseUsually standardization for age and sexCrude death rate includes only deaths from death certificate dataStandardization mortality ratio is the unexpected number of death divided by observed number of deaths in a specific group  <response>: Refer: K. Parks Textbook of Preventive and Social medicine, 24th edition, pg no: 63Standardized mortality ratioStandardized mortality ratio is the ratio of observed deaths by expected number of deathsStandardization is usually done for age sex in order to compare death rates between the countriesCrude death rates are estimated by SRS in India. NFHS have also given data.Only deaths from death certificate data are not the only source. 