Work or home? Investigating the mystery of injury origins
Employers may need to evaluate whether an injury happened at work or at home, or if something at work contributed to a condition. For recording on the OSHA 300 Log, an at-home injury could get aggravated at work, or a work-related injury could get aggravated off the job. Determining the origin might be necessary, but any work-related case gets recorded using the same criteria.
Where did it start?
If an injury or illness has any connection to a workplace event or exposure, the case is work-related, regardless of whether it started at work or at home. The regulation at 1904.5(b)(3) addresses handling cases when the employer isn’t sure where the “precipitating event or exposure” happened. That paragraph says to evaluate the employee’s duties and work environment, then decide if something at work either caused or contributed to the condition.
A workplace event need not be a significant contributor. In fact, OSHA rejected suggestions that the workplace should be a “primary cause” or “major contributor” to a condition. If something at work contributed in any way, the incident will be work-related.
OSHA also noted that an employer might not be able to identify a specific event or exposure at work. For example, suppose an employee reported a back injury but cannot identify a particular event or movement that caused the injury. If it seems likely that work duties contributed to the condition, the case is work-related for the 300 Log. Conversely, if the employer’s evaluation determines that the back injury was solely due to a non-work activity, it would not be work-related.
Aggravated at home
Some work-related cases might get aggravated outside of work. For example, suppose an employee gets a sore back from performing job duties and visits a doctor, but the doctor does not impose restrictions. The employee then further injures their back performing chores at home and now needs restrictions at work. The employer must record those restricted work days.
In OSHA’s view, there’s a direct connection between the workplace injury and the need for restrictions. Again, OSHA does not require that the workplace be a significant or primary contributor, only that it be an identifiable factor.
For related information, see our article Understanding aggravation of employee injuries.
Investigating injury reports
As noted, OSHA recognized that employers might need to evaluate whether an injury happened at work or at home. In some cases, the injury might not appear to be work-related, but the employee claims it happened at work (or got worse at work).
There’s no secret to investigating these reports. The employer must evaluate the employee’s work duties and environment, then determine if work was likely a factor. Depending on the details, interviews, witness statements, and credibility assessments, employers might determine that the work environment was not a factor.
Second work-related injury
An employee with a work-related injury that requires restrictions might get a second work-related injury that also requires restrictions or days away. For example, an employee on restrictions from a shoulder injury might twist an ankle and need days away. How does the employer record these cases?
OSHA guidance says to stop counting days on the first case and enter the newest incident with a day count. If the employee recovers from the second injury and no longer needs restrictions, but has not yet recovered from the first injury, the employer must resume the day count for the first injury.
Key to remember: Whether an injury started at work or at home, any connection to the work environment makes the case work-related on the 300 Log.