This application could apply equally for both incidence and prevalence data.
This is a use for neither incidence data nor prevalence data. An epidemiologic survey of roller-skating injuries in Metroville, a city with a population of 100,000 (during the midpoint of the year), produced the following data for a particular year:
Number of skaters in Metroville during any given month 12,000 Roller-skating injuries in Metroville 600 Total number of residents injured from roller-skating 1,800 Total number of deaths from roller-skating 90 Total number of deaths from all causes 900
The cause-specific mortality rate from roller-skating was: Answer
90/600 × 100,000
90/100,000 × 100,000
90/1,800 × 100,000
90/900 × 100,000
