Background and Objective: The construction industry is one of the most dangerous industries. Therefore, in order to improve the conditions and perform preventative interventions, the senior managers of construction projects need to understand the factors affecting safety performance. In this regard, the present study aimed to investigate the relationship between safety investments and safety performance indicators in the construction industry.
Materials and Methods: This descriptive-analytic study was carried out on five major construction worksites of Tehran, Iran, using multiple case study method in 2018. Data were collected using various techniques, such as performing structured interviews, evaluating safety documentation, and using questionnaires. Collected data were analyzed using SPSS software (version 18).
Results: Obtained results of the present study indicated a strong negative correlation between the various types of safety investments (i.e., total safety investments, basic safety investments, and voluntary safety investments) and accident frequency rate (i.e., retrospective index) (r=-0.936, P<0.05). In addition, the findings revealed a strong direct correlation of the aforementioned variable with safety performance (i.e., prospective indicator) (r=0.939, P<0.05). Furthermore, there was a significant relationship between marital status and age with safety performance (P<0.05).
Conclusion: Results of the present study showed that an increase in the level of safety investments (i.e., total safety investments, basic safety investments, and voluntary safety investments) will improve safety performance.