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Injury Severity Rate

Definition - What does Injury Severity Rate mean?

Injury severity rate is the number of lost work days experienced per 100 workers. The injury severity rate shows the extent of safety anomalies by revealing how critical the injuries and illnesses are. The theory is that an employee who takes time to return to work after injury had a more severe problem than one who can return immediately.

Safeopedia explains Injury Severity Rate

Injury severity rate data is used to estimate the organizational performance on safety. Injury severity rate shows the safety performance and guides the requirement for training and safety observations.

Injury severity rate can be calculated by the following formula:

Injury severity rate = (number of work days lost + light duty days lost) x 200,000 / total hours worked.

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