• Data reference period
• Place of residence (Portugal)
• Sex
• Economic activity (Section - CAE Rev. 3)

• SEX:  Biological and physiological characteristics that define men and women.
• ACCIDENT AT WORK:  Accident that occurs within the scope of professional activity or during the time spent at work and which results in physical or mental injury.
• ECONOMIC ACTIVITY:  Combination of resources such as labour, raw materials, equipment, etc., are joined, leading to the creation of specific goods or services. Regardless of the factors of production integrating the good or service produced, all activities generically imply an input of products (goods or services), a production process and an output of products (goods or services).
• INCIDENCE:  Number of new cases of illness, accidents or other health problems occurring in a given reference period.
• LOCAL UNIT:  An enterprise or part thereof (e.g. a workshop, factory, warehouse, office, mine or depot) situated in a geographically identified place. At or from this place economic activity is carried out for which ' save for certain exceptions ' one or more persons work (even if only part-time) for one and the same enterprise.
• REFERENCE PERIOD:  Period to which the information refers and which may be a specific day or a time interval (month, fiscal year, calendar year, among others).
• EMPLOYED POPULATION:  Population formed by all employed persons.

(Non-fatal accidents at work with 4 or more days of absence year x/ Persons in employment year x)*100,000