Accident incidence rate

The variation of accident incidence risks prevailing in different industries or occupational and other such groups can be measured by taking the number of accidents as a proportion to the number of employees in each branch. When this is done, the ratios gained can be regarded as the "risk figures" of a certain occupation or industry. In practice, accident proneness also varies within the same occupation or industry by task, for instance.

The accident incidence rate refers to the ratio of the number of accidents and employees. In accidents causing a disability of at least three days the ratio is calculated per 1,000 employees and in fatal accidents per 100,000 employees.