مجله مهندسی بهداشت حرفه ای
سال دهم شماره 2 (تابستان 1402)

Explosives storage is considered to be one of the most dangerous working parts of mines where the people working there are exposed to all kinds of physical, chemical and psychological risks and injuries that can have a negative effect on their health; Therefore, the current research was conducted in this direction and with the aim of providing a model for risk assessment of the dangers in these warehouses.

First, using the Fine-Kinney risk assessment method, the effective criteria in determining the risks of explosives warehouse, including the Consequently, probability and exposure, were identified, and then the weight of each criterion was calculated using Shannon's entropy method. Finally, the risks of this job were determined and prioritized using the ARAS method.

Based on Shannon's entropy method calculations, among the three investigated criteria, the Consequence criterion with a weight of 0.61 was assigned the most weight. Also, among the various risks investigated, the use of any flame-producing devices in the warehouse (R14), Not using special tools while opening the box of explosives (R17) and opening the boxes inside the warehouse (R7) were determined as the most important risks of explosives warehouses.

In this study, the Consequence was determined as the most important criterion, and the use of any flame-producing devices in the warehouse was determined as the most important risk. The proposed method can be used as a risk assessment method to identify the risks in the warehouse of explosives.

Sleep is a vital need for humans. Industrial workers are among the people who suffer from insomnia and sleep problems due to rotating shifts. Therefore, this study aims to investigate the relationship between sleep quality and the quality of life of industrial workers with rotating shifts.

234 industrial workers participated in this descriptive-cross-sectional study. Data were collected using a demographic information questionnaire, a short form of the World Health Organization Quality of Life Questionnaire (WHOQOL-BREF), and the Pittsburgh Sleep Quality Index (PSQI). Data were analyzed with an independent t-test, Pearson's correlation coefficient, and one-way ANOVA test in SPSS statistical software version 24.

The mean and standard deviation of the age of participants was 31.6±5.7 years. The mean and standard deviation of WHOQOL-BREF and PSQI scores were 66.5±11.3 and 5.8±1.6, respectively. A significant relationship was also observed between the quality of sleep and workers' quality of life (r=-0.31). People with higher age and work experience had lower quality of sleep and quality of life. Also, women experienced lower quality of sleep and quality of life compared to men and married people compared to single people.

Considering the significant relationship between the quality of sleep and the quality of life of workers, it is suggested that managers and supervisors of industries and factories design the work schedule of workers in such a way that the quality of sleep of workers and consequently the quality of life improve.

The Quality of Working Life (QWL) is one of the most influence organizational factor and taxi is the most common public transport system in small cities. The present study aimed to evaluating the QWL and its associated factors among urban taxi drivers.

This descriptive analytical study done with participating 176 urban taxi drivers working in one of the southern cities of West Azerbaijan province. Using census method individuals including in the study considering the inclusion criteria and answered a two-part questionnaire consisting of demographic characteristics and Walton’s QWL questions. Finally, data were analyzed using SPSS 24 software at a significant level of 0.05. 

QWL evaluating showed that 18 drivers were at low level, 151 drivers were at moderate level and 7 drivers were at high level. Week and positive correlations were observed between QWL and both age and work experience. Some individual characteristics were found to be significantly associated with some aspects of QWL; while, the mean score of QWL was not significantly associated with individual characteristics such as education level, marital status, and body mass index.

The status of QWL was low and moderate in most drivers. In general, the mean score of QWL was not associated with individual characteristics such as educational level, marital status, and body mass index. More comprehensive studies are needed in this regard.

Occupational stress is an interactive situation between the job situation and the person working in that job.In the effort-reward imbalance model, which is a method for measuring job stress, the imbalanced relationship between the invested efforts and the rewards received in employees causes stressful reactions. which in the long term causes physical and mental damage to the person. The present study aims to investigate the relationship between job stress and the intention to leave the job and early retirement by investigating the mediating role of job satisfaction in nurses.

This study is a correlational study that was collected in 2017 by field method and through a questionnaire. The study sample was 455 nurses working in the government hospitals of Hamedan city. Data collection tools in this research included 4 self-report questionnaires including job stress, intention to turnover, early retirement and job satisfaction. Finally, after collecting data, SPSS software version 18 was used for analysis.

The results of this study showed that there was a significant negative relationship between effort-reward imbalance with job satisfaction and a significant positive relationship with the intention to  turnover, but no significant relationship was observed between effort-reward imbalance and the intention to retire early. Also, there was a significant negative relationship between job stress and job satisfaction.

According to the results, the variables used in this research, especially the variables that had a mediating role, should be considered in organizational planning and policies to reduce occupational diseases and increase employee health.

Workforce aging is one of the problems that has led to a decrease in their working ability. The aim of this study is to evaluate the perceived work ability and its association with fatigue and general and mental health in industrial workers.

A total of 350 people working in various industries of Zahedan city participated in this cross-sectional study. The data were collected using the first item of the work ability index questionnaire known as work ability score (WAS), the fatigue assessment scale, and the general and mental health scales of the Copenhagen questionnaire. Pearson correlation and multiple linear regression were used to analyze the data. The data were analyzed using SPSS24 software.

The mean score of the WAS among studied subjects was 4.76±1.59, which is categorized as a poor level. According to the results of multiple linear regression analysis, fatigue, general health, and mental health had a significant effect on perceived work ability, among which the strongest relationship was related to fatigue (β= -0.324 and P<0.001). The results of the study did not show a relationship between body mass index and perceived work ability (β=-0.021 and P<0.05).

According to the findings of the research, the perceived work ability was at a poor level. Fatigue and general health had the greatest effect on perceived work ability. It is suggested to design and implement studies in order to identify other factors affecting work ability.

Municipal gas is a hazardous substance with high flammability, the creation of unsafe acts and conditions in its transmission and distribution of it can lead to many accidents. Therefore, the present study was conducted with the main aim of modelling the effect of individual, occupational, and organizational factors in the occurrence of occupational accident in the West Azerbaijan gas company.

In this cross-sectional study, a validated researcher-made questionnaire was used to identify influencing factors on the occurrence of occupational accidents. A questionnaire was distributed among 500 employees of the company and a total of 379 acceptable questionnaires (79.4%) were received for analysis. The relationship between the study variables was analyzed using SPSS software. Structural equation modeling (SEM) was conducted using in AMOS software

The results of the present study showed that the average score of the questionnaire factors was 2.84 (±0.82). Examining the scores of different factors of the questionnaire indicated that the average score of the organizational factor is 3.21 was greater than the average score of the individual (2.53) and job factors (2.79). In the SEM model, the effect of job factor on the individual factor (0.54) was higher than effect of organizational factor on the individual factor (0.24), but different factors did not have a significant effect on the occurrence of occupational accidents.

The management of the organization must control the organizational factors as the most important influencing factor with appropriate monitoring and planning.

Oxygen therapy is one of the integral parts of a hospital, which has been introduced as a therapeutic use of oxygen and any human error in this field can have disastrous results. The purpose of this research is to analyze the risk of the oxygen supply system of one of Qazvin hospitals using the method of studying risk and human performance.

In this research first, study team members were selected according to the purpose of the study to benefit from their experiences in discovering the possible situations of human operation risks; then according to the field visits, interviews and existing documents, the duties of people related to the objective were analyzed by the Hierarchical Task Analysis technique. Then, the types of errors and causes were identified and proposed controls were presented to reduce unacceptable risks.

According to the 75 scenarios obtained from the method used, the results indicate that failure to perform job duties with 32.42% as the most important parameter, with the most important factors of human error such as memory slip (38%) and heavy workload (31%) plays a role in the three categories of consequences of fire, explosion and reduction of oxygen sent to the departments.

This method can be used to reduce the risk of fire, explosion and reduce the oxygen pressure sent to different units by using the techniques of improving working conditions, changing the way of training, equipping the oxygen concentration detection sensor and using the liquid oxygen tank

Hospitals are one of the most important organizations in the healthcare system. Risk assessment is a tool to control risks and hazard management in the hospital is useful for reducing the risk of risks and reducing the frequency of hospital accidents. This study was conducted in order to evaluate the safety and health risk of the hospital using the HOSHRA method.

This cross-sectional study was conducted in 32 departments in a medical teaching hospital in Mashhad in 1401. The data was collected using the HOSHRA checklist and analyzed using the HOSHRA method formulas.

The highest score was obtained in the area of ​​ergonomic hazards(102/8) and the lowest score was related to the area of ​​physical agents(67/28) in the hospital. Except for the score of the ergonomics area, the scores of the physical, chemical, psychological, and biological areas were at the medium risk level, and the ergonomics area was at an acceptable level.

This study showed that ergonomic hazards are at an acceptable level, which requires continuous monitoring. And on the other hand, chemical, ergonomic, psychological, physical, and biological risks are not acceptable at the risk level and need more reforms in the future.