For cases involving days away from work, the survey presents numeric and percent distributions by occupation and by the worker traits and four case characteristics defined in the preceding section. The latter measures are presented nationwide, by industry, and for the aforementioned worker and case characteristics.
Incidence rates permit comparison among industries and establishments of varying sizes.
In this way, a firm with 5 cases recorded for 70 employees can compare its injury and illness experience to that of an entire industry with 12,000 cases for 150,000 employees. These measures are available for injuries only and for injuries and illnesses combined. For illnesses, rates are available for total cases and separately for the seven illness categories defined in the preceding section.