Formats for mortality rate
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Mortality rates should be expressed in standard formats so that they can be compared between populations and between time periods for the same populations.
Which is true of the comparison of the following two mortality rates?
A) 271 deaths per 158,934 population per 13 days
B) 445 deaths per 72,072 population per 47 days
Some common formats for mortality rates are:
Number of deaths per 1000 population per year
This is the format most commonly used by demographers to express annual mortality rates in stable populations
Number of deaths per 10,000 population per day
This is the format used in acute humanitarian emergencies when mortality is changing rapidly and mortality rates are calculated daily or weekly.
Number of deaths per 1000 population per month
This is the format sometimes used in displaced populations after the situation has stabilized and mortality rates are calculated less frequently.
Regardless of which format it is expressed in, the mortality rate reflects the same risk of death. Conversion from one format to another is just an exercise in arithmetic.