Cases which are recordable injuries or illnesses under OSHA recordkeeping guidelines but do not result in any days away from work, nor a job transfer or restriction, beyond the day of the injury or onset of illness. Other recordable cases can also be expressed as a rate. The incident rate calculation is: (N/EH) x 200,000, where N = number of injuries and illnesses; EH = total hours worked by all employees during the calendar year; and 200,000 = base for 100 equivalent full-time workers (working 40 hours per week, 50 weeks per year). When the rate reflects a base of 10,000 equivalent full-time workers, 20,000,000 is used instead of 200,000.