Incidence rate is the measure of frequency with which a case occurs in a given time period.
It is calculated as:
New cases occurring during a given period of time x10n
Population at risk during same time period
The median of days away from work is a measure used to summarize the varying lengths of absences from work among the cases with days away from work. The median is the point at which half of the cases involved more days away from work and half involved less days away from work.
– U.S Bureau of Labor