Certified Treecare Safety Professional (CTSP) Practice Exam

Company A has 12 full-time employees who worked an average of 1,780 hours each last year. They had four recordable injuries, including two lost workday injuries. What is their incidence rate?

1. 25.0

2. 30.0

3. 37.5

4. 45.0

The correct answer is: 37.5

To calculate the incidence rate of injuries for Company A, you need to use the formula for injury incidence rate, which is: Injury Incidence Rate = (Number of Recordable Injuries × 200,000) / Total Hours Worked In this scenario, Company A had four recordable injuries. First, determine the total number of hours worked by all employees. With 12 full-time employees working an average of 1,780 hours each, you multiply the number of employees by the average hours worked: Total Hours Worked = 12 employees × 1,780 hours/employee = 21,360 hours. Now that you have the total hours worked, plug the numbers into the incidence rate formula: Injury Incidence Rate = (4 recordable injuries × 200,000) / 21,360 hours Injury Incidence Rate = (800,000) / 21,360 ≈ 37.5 Thus, Company A's incidence rate is approximately 37.5. This figure indicates how many injuries occurred per 100 full-time employees standardized to a 200,000-hour work year, allowing for a more comparable measure across different companies and industries. This calculation and resulting incidence rate serve as an