Lost time injury rate is a calculation used to determine the frequency of lost time injuries (LTIs). The calculation is based upon the number of lost time injures within a given period divided by the total number of hours worked in t
hat period. This calculation yields a figure that represents the number of lost time injuries per hour worked during the period in question.
A lost time accident is an accident occurring at work that results in at least one day's absence from work, not including the day that the accident occurred.