Tehran University of Medical Sciences International Journal of Occupational Hygiene 2008-5109 12 2 2020 07 30 132 139 Zohreh Fazli MSc, Occupational Health, Department of Occupational Health, Faculty of Health, Bam University of Medical Sciences, Bam, Iran Hanieh Ghorbani Parizi BSC, Occupational Health, Student Research Committee, Faculty of Health, Bam University of Medical Sciences, Bam, Iran Moazameh Mahmoud Abdi BSC, Occupational Health, Student Research Committee, Faculty of Health, Bam University of Medical Sciences, Bam, Iran Bahram Kouhnavard Ph.D Student of Ergonomics, Department of Occupational Health and Safety Engineering, Tehran University of Medical Sciences 2020 08 10 2020 10 22 The purpose of this study was to investigate character variations and its relationship with occupational fatigue and involvement (labor participation) among employees in a melting unit at Sarcheshmeh Copper Complex. This cross-sectional research was carried out on 145 employees of melting unit at Sarcheshmeh Copper Complex. A simple random sampling was used to collect data based on the three standard Hospital Anxiety and Depression Scale (HADS), Swedish Occupational Fatigue Inventory (SOFI), and Labor Participation (Job Involvement). One-way ANOVA, Pearson correlation coefficient and Spearman's correlation coefficient were used to analyze the data. The average age of the respondents was 38 ± 6.94 years and their average working experience was 10.46 ± 6.73 years. Among the personnel, (76%, n=111) had acute anxiety and (64%, n=93) had mild depression. The mean and standard deviation of job   involvement for these subjects was 52.41 ± 7.12 (Desirable situation). There was a significant relationship among all aspects of fatigue including lack of energy, physical effort, lack of motivation, drowsiness (P <0.05) whereas the physical discomfort with job involvement did not show a positive relationship. The results indicated that there was acute anxiety, mild depression and high job involvement among the employees of melting unit. https://ijoh.tums.ac.ir/index.php/ijoh/article/view/447 https://ijoh.tums.ac.ir/index.php/ijoh/article/download/447/616