Employers must keep records of all work-related injuries and illnesses that result in loss of work time, medical treatment, or lost consciousness. Forms OSHA 300 and 300A must be maintained and posted in the workplace. The 300 log must include the name of the injured employee, date of injury, classification of the type of injury, and number of days away from work or job restriction. Summary information must be reviewed and certified by an employer representative. Incident investigations must be conducted promptly to identify the root cause and prevent recurrence. Investigations must include interviews with the injured party and witnesses. Documentation of investigation must include findings and corrective actions. Root causes often involve unsafe conditions, unsafe acts, or lack of training. Corrective actions must address the identified causes. All workplace records must be kept for 5 years following the end of the year in which the injury occurred. OSHA requires reporting of work-related fatalities within 8 hours and serious injuries within 24 hours. Serious injuries include those requiring emergency room treatment or hospitalization. Trends in injuries must be analyzed to identify common hazards. Safety programs must be evaluated based on incident history. Workers compensation insurance is required in most states. First report of injury forms must be filed with workers compensation. Benefits for injured workers are protected by law and cannot be reduced.