A lost time injury refers to any injury sustained on the job by an employee which results in that employee being absent from at least a full day of work. The time off does not include the day of the injury. If the employee has the following day off, then the injury is classified as a lost time injury.
A medical treatment case is any injury sustained on the job by an employee which requires medical treatment from a professional physician or qualified paramedic. It does not include on the job first aid treatment. A medical treatment case does not necessitate time off work beyond the date of the injury to be classified as such.