How is injury length calculated? (2024)

FAQs

How do you calculate injury rate? ›

An incidence rate of injuries and illnesses may be computed from the following formula: (Number of injuries and illnesses X 200,000) / Employee hours worked = Incidence rate.

Duration rate — the average number of work days lost per injury. Injury index — the number of work days lost per million hours worked (frequency rate x duration rate).

Calculating Lost Time Injury Frequency Rate

([Number of lost time injuries in the reporting period] x 1,000,000) / (Total hours worked in the reporting period). And voila! Your company's LTIFR is 2.4, which means there were 2.4 lost time injuries for every one million man hours worked.

The LTIR measures the number of lost time incidents per 100 employees working a certain number of hours, while the TRIR measures the number of incidents resulting in lost time or restricted duty per 200,000 hours worked.

DISABLING INJURY INDEX. An index computed by multiplying the disabling injury frequency rate by the disabling injury severity rate and dividing the product by 1,000: DII = DIFR x DISR / 1000. This measure reflects both frequency and severity, yielding a combined index of total disabling injury (ANSI Z16).

The Damages Formula

The adjuster will multiply the medical special damages number by one and a half to three times if the injury is minor and up to five or more times if the injury is especially deliberating and long-term. After this number is calculated, any income lost as a result of the injury will be added.

An injury frequency rate is a metric that reflects the number of injuries sustained by workers over a period of time. This is one way employers measure their own safety standards; if they have lower rates then it's likely because they've implemented more rigorous policies around avoiding accidents.

Healthcare providers define a chronic or long-term injury as anything that causes symptoms for at least three months or longer.

Injury time is the period of time added to the end of a football game because play was stopped during the match when players were injured.

(LTI / Total # Hours) x 200,000

For simplicity's sake, let's say you ended the year with two lost time injuries. If the organization calculated 150,000 hours worked, the resulting metric would reflect 2.67 lost time injuries per 100 workers.

How is OSHA recordable injury rate calculated? ›

TRIR = (Number of OSHA recordable incidents) X 200,000 / (Total number of hours worked)

How to calculate lost workdays and business costs. The lost time rate calculates the total lost hours as a percentage for the maximum possible hours worked. The formula for this calculation is as follows: The number of hours work missed, divided by the maximum number of hours worked, multiplied by 100.

The basic formula is (N x 200,000)/EH, or the number of cases (N) multiplied by 200,000 then divided by the number of hours worked (EH) by all employees during the time period, where 200,000 is the base for 100 full-time workers (working 40 hours per week, 50 weeks per year).

The formula for calculating the manhour is The total number of workers x the total number of hours worked in a day x the total number of days worked over a specific period.

As stated in section B. 1 on page 48 of the Recordkeeping Guidelines for Occupational Injuries and Illnesses, lost workday cases involving days away from work are cases resulting in days the employees would have worked but could not because of the work related injury or illness.

The incident rate calculation is: (N/EH) x 200,000, where N = number of injuries and illnesses; EH = total hours worked by all employees during the calendar year; and 200,000 = base for 100 equivalent full-time workers (working 40 hours per week, 50 weeks per year).

To calculate the incidence in relation to these exposure hours, the total number of injuries recorded over a period is divided by the total exposure for that period, and the result multi- plied by 1000 to obtain the rate per 1000 hours.

The lost time incident rate formula: (lost time injuries / total hours worked) x 200,000 = LTIR per 100 employees. Knowing how to calculate the lost time incident rate is a clear process.