Glossary of Terms

Accident is that occurrence in a sequence of events that produces unintended injury, death, or property damage. Accident refers to the event, not the result of the event (see unintentional injury).


Cases without lost workdays are cases that do not involve lost workdays but result in medical treatment other than first aid, restriction of work or motion, loss of consciousness, transfer to another job, or diagnosis of occupational illness.

Death from accident is a death that occurs within one year of the accident.

Disabling injury is an injury causing death, permanent disability, or any degree of temporary total disability beyond the day of the injury.

Fatal accident is an accident that results in one or more deaths within one year.

Home is a dwelling and its premises within the property lines including single-family dwellings and apartment houses, duplex dwellings, boarding and rooming houses, and seasonal cottages. Excluded from Home are barracks, dormitories, and resident institutions.

Incidence rate, as defined by OSHA, is the number of occupational injuries and/or illnesses or lost workdays per 100 full-time employees.

Injury is physical harm or damage to the body resulting from an exchange, usually acute, of mechanical, chemical, thermal, or other environmental energy that exceeds the body's tolerance.

Lost workdays are those days on which, because of occupational injury or illness, the employee was away from work or limited to restricted work activity. Days away from work are those days on which the employee would have worked but could not. Days of restricted work activity are those days on which the employee was assigned to a temporary job, or worked at a permanent job less than full time, or worked at a permanent job but could not perform all duties normally connected with it. The number of lost workdays (consecutive or not) does not include the day of injury or onset of illness or any days on which the employee would not have worked even though able to work.

Lost workday cases are cases that involve days away from work, or days of restricted work activity, or both.

Motor vehicle is any mechanically or electrically powered device not operated on rails, upon which or by which any person or property may be transported upon a land highway. The load on a motor vehicle or trailer attached to it, is considered part of the vehicle. Tractors and motorized machinery are included while self-propelled in transit or used for transportation. Nonmotor vehicle is any road vehicle other than a motor vehicle, such as a bicycle or animal-drawn vehicle, except a coaster wagon, child's sled, child's tricycle, child's carriage and similar means of transportation; persons using these latter means of transportation are considered pedestrians.

Motor-vehicle accident is an unstabilized situation that includes at least one harmful event (injury or property damage) involving a motor vehicle in transport (in motion, in readiness for motion, or on a roadway, but not parked in a designated parking area) that does not result from discharge of a firearm or explosive device and does not directly result from a cataclysm. [See Committee on Motor Vehicle Traffic Accident Classification, (1997), Manual on Classification of Motor Vehicle Traffic Accidents, ANSI D16.1-1996, Itasca, IL: National Safety Council.]

Motor-vehicle traffic accident is a motor-vehicle accident that occurs on a trafficway-a way or place, any part of which is open to the use of the public for the purposes of vehicular traffic. Motor-vehicle nontraffic accident is any motor-vehicle accident that occurs entirely in any place other than a trafficway.

Nonfatal injury accident is an accident in which at least one person is injured, and no injury results in death.

Occupational illness is any abnormal condition or disorder, other than one resulting from an occupational injury, caused by exposure to environmental factors associated with employment. It includes acute and chronic illnesses or diseases that may be caused by inhalation, absorption, ingestion, or direct contact.

Occupational injury is any such injury such as a cut, fracture, sprain, amputation, etc., which results from a work accident or from a single instantaneous exposure in the work environment.

Pedalcycle is a vehicle propelled by human power and operated solely by pedals; excludes mopeds.

Pedestrian is any person involved in a motor-vehicle accident who is not in or upon a motor vehicle or nonmotor vehicle. Includes persons injured while using a coaster wagon, child's tricycle, roller skates, etc. Excludes persons boarding, alighting, jumping or falling from a motor vehicle in transport who are considered occupants of the vehicle.

Permanent disability (or permanent impairment) includes any degree of permanent nonfatal injury . It includes any injury that results in the loss, or complete loss of use, of any part of the body, or any permanent impairment of functions of the body or a part thereof.

Property damage accident is an accident that results in property damage, but in which no person is injured.

Public accident is any accident other than motor-vehicle that occurs in the public use of any premises. Includes deaths in recreation (swimming , hunting, etc.), transportation except motor-vehicle, public buildings, etc., and from widespread natural disasters even though some may have happened on home premises. Excludes accidents to persons in the course of gainful employment.

Source of injury is the principal object such as tool, machine, or equipment involved in the accident and is usually the object inflicting injury or property damage. Also called agency or agent.

Temporary total disability is an injury that does not result in death or permanent disability, but that renders the injured person unable to perform regular duties or activities on one or more full calendar days after the day of the injury.

Total cases include all work-related deaths and illnesses, and those work-related injuries that result in loss of consciousness, restriction of work or motion, transfer to another job, or require medical treatment other than first aid.

Unintentional injury is the preferred term for accidental injury in the public health community. It refers to the result of an accident.

Work hours are the total number of hours worked by all employees. They are usually compiled for various levels, such as, an establishment, a company, or an industry. A work hour is the equivalent of one employee working one hour.

Work injuries (including occupational illnesses) are those that arise out of and in the course of gainful employment regardless of where the accident or exposure occurs. Excluded are work injuries to private household workers and injuries occurring in connection with farm chores that are classified as home injuries.

Workers are all persons gainfully employed, including owners, managers, other paid employees, the self-employed, and unpaid family workers.

Work/Motor-vehicle duplication includes work injuries that occur in motor-vehicle accidents (see definitions for work injuries and motor-vehicle accident).