Academy of Medical Sciences of I.R. Iran Archives of Iranian Medicine 1029-2977 24 11 2021 11 01 Psychological and Psychosocial Impact and Related Factors during the COVID-19 Pandemic among Iranian Oil Refineries Personnel: A longitudinal study 811 821 10.34172/aim.2021.121 EN Ahmad Soltanzadeh https://orcid.org/0000-0002-6976-1276 Mohammad Ghasemi https://orcid.org/0000-0002-8254-8701 Mansoureh Sadeghi-Yarandi https://orcid.org/0000-0002-5175-3809 Hamedeh Golmohammadpour Maedeh Maddahi Sepehr Sadeghi-Yarandi https://orcid.org/0000-0002-2844-4274 Saba Kalantary Mohsen Sadeghi-Yarandi https://orcid.org/0000-0002-2512-8591 Journal Article 10.34172/aim.2021.121 2020 12 31 2021 04 28 Background: The COVID-19 outbreak is currently a critical challenge, and proper perception of the mental health situation of individuals in the working environments has become a crucial issue. This study aimed to investigate the psychological and psychosocial impact during the COVID-19 pandemic among Iranian oil refineries personnel. Methods: This longitudinal study was conducted in two phases from November 2019 to July 2020 among the 850 employees of three refineries in Iran. To study the mental workload, job burnout, lifestyle, occupational stress, general health, and memory quotient of personnel, the NASA-TLX questionnaire, Maslach Burnout Inventory (MBI) questionnaire, Walker’s health-promoting lifestyle questionnaire, health and safety executive (HSE) job stress questionnaire, general health questionnaire, and Wechsler memory scale were used, respectively. Data were analyzed using paired sample t test, independent sample t test, and one-way ANOVA in SPSS version 25. Results: The study results revealed that the mean age of studied personnel was 34.62±13.48 years. There was a meaningful correlation between the values of mental workload, job burnout, occupational stress, general health, healthy lifestyle, and memory quotient of personnel before and during the COVID-19 pandemic (P value<0.05). Conclusion: The COVID-19 pandemic can significantly affect the psychological and psychosocial parameters of employees in working environments. Therefore, implementing psychological interventions is absolutely necessary to promote personnel’s mental health during the COVID-19 pandemic.