Every employer shall keep a record of all injuries, fatal or otherwise, alleged by an employee to have been sustained in the course of the employee’s employment and resulting in incapacity for a longer period than one day. If the injury results only in temporary disability, causing incapacity for a longer period than three days, then within four days thereafter, not counting Sundays and legal holidays, the employer or insurance carrier having had notice or knowledge of the occurrence of such injury and resulting disability shall file a report with the workers’ compensation commissioner in the form and manner required by the commissioner. If such injury to the employee results in permanent total disability, permanent partial disability, or death, then the employer or insurance carrier, upon notice or knowledge of the occurrence of the employment injury, shall file a report with the workers’ compensation commissioner within four days after having notice or knowledge of the permanent injury to the employee or the employee’s death. The report to the workers’ compensation commissioner of injury shall be without prejudice to the employer or insurance carrier and shall not be admitted in evidence or used in any trial or hearing before any court, the workers’ compensation commissioner, or a deputy workers’ compensation commissioner except as to the notice under section 85.23.