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

• 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.
• 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:  Person aged 15 years or over who during the reference period was in one of the following situations: 1) worked for at least one hour for a wage or salary, in cash or in kind; 2) had a formal attachment to his/her job, but was not at work, temporarily; 3) had an enterprise, but was not at work, temporarily, for any specific reason; 4) was in early retirement, but working in the reference period.
• 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.

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