This study has investigated whether the occurrence of low back pain was related to occasional risk assessment for musculoskeletal disorders or not and also examined the implementation method to investigate hazardous factor survey effectively in risk assessment for musculoskeletal disorders.
Low back pain has been the largest proportion of occupational diseases caused by musculoskeletal disorders in Korea. Nevertheless, most current patterns of low back pain have not included in the scope of musculoskeletal burden tasks. It is excluded from both an investigation for cause investigation and improvement of the working environment. Because of these, musculoskeletal diseases caused by low back pain still have a high incidence, and there are still many problems that do not lead to practical preventive activities.
To prevent the recurrence of low back pain, it is important to identify the harmful factors and to present the method of conducting the risk assessments for musculoskeletal burden tasks to improve the working environments.
In this study, the current status and trends of musculoskeletal disorders were analyzed based on industrial accident statistics for the past 20 years. Besides, the current ''Occupational Safety and Health Act'' and international standards were compared to prevent low back pain. Also, the results of previous studies on the risk assessment of low back pain and similar systems were compared and analyzed to examine the problems and good ways to improve the current system.

Based on the results of the study, the following suggestions were made for the method of investigating the risk assessment of musculoskeletal disorders in the case of musculoskeletal disorders caused by low back pain.
First, when a work-related musculoskeletal disorders is approved for low back pain, the risk assessments for musculoskeletal burden tasks should be carried out separately to either musculoskeletal burden tasks or for non-musculoskeletal burden tasks.
Second, when low back pain with non-musculoskeletal burden tsaks happen, risk assessments and report on industrial accidents by used of ''the KOSHA GUIDE M-35-2012 Technical Guidelines for Risk Assessment of Workforce Transport Tasks''. Risk assessment and environmental improvements should be implemented to prevent a recurrence.
Third, the relevant agencies such as the Korea Workers'' Compensation and Welfare Service and the Ministry of Employment and Labor should present a good guide for the risk assessment of musculoskeletal disorders which includes evaluation methods and tools to increase the risk assessment implementation rate and promote the efficient improvement of the work environment.
The results of this study are expected to help improve the problems in the risk assessment system for musculoskeletal disorders due to low back pain and to efficiently conduct a more effective risk assessment of musculoskeletal disorders in the near future.