فهرست مطالب مرضیه هنربخش

Internet addiction has a negative effect on mental health and leads to clinical discomfort and disorder. Therefore, this study was conducted to investigate the relationship between Internet addiction with sleep quality and depression in dormitory students.

This study was a descriptive-analytical study. Since all students living in dormitories participated in this study (95 people), the sampling method was census. The study used three Young Internet addiction questionnaires, the Goldberg Depression Inventory, and the Petersburg Sleep Quality Questionnaire. For statistical analysis of data, descriptive statistics such as mean, standard deviation and also analytical statistical tests such as one-way analysis of variance with SPSS 22 software were used.

Among the students studied, 63 (66.3%) were normal in terms of Internet addiction, 31 (32.6%) were mildly addicted and 1 was severely addicted to the Internet. The study of depression among students showed that out of 95 people, 22 people have mild to moderate depression and 10 people have borderline depression. The mean score of studentschr('39') sleep quality was 7.38 ± 2.88 and there was a significant relationship between it and Internet addiction (P <0.001)

Given the prevalence of Internet addiction among students and its significant association with depression and poor sleep quality, the necessary planning should be done to prevent this health problem.

Considering the importance of maintaining the energy and health of the staff and faculty members as human beings, organizational conflict can have a significant impact on public health, performance, and the rate of depression in these individuals. The aim of this study was to investigate the relationship between job performance and depression with organizational conflicts in professors and staff of Larestan University of Medical Sciences.

This descriptive-analytical cross-sectional study was conducted in 2016 on 82 professors and staff of Larestan University of Medical Sciences  selected by census sampling method. In order to collect information in the present study, three questionnaires (organizational conflict, job performance, and Goldberg depression) were used.

The mean of depression was 58.20 with a standard deviation of 17.16, the mean of job performance was 30.55 with a standard deviation of 27.5, and the mean of organizational conflict was 93.20 with a standard deviation of 42.5. Conflict with subordinate had a higher mean score and conflict with peers had a lower mean score. The frequency distribution of depression among the participants showed that healthy individuals had the highest frequency (27.7%) and individuals with severe depression had the lowest frequency (4.8%).

The findings showed an inverse relationship between depression and job performance, but a direct relationship was observed between depression and organizational conflict. By identifying and modifying the causes of stress in the workplace, we can see the improvement of performance and the creation of desirable and efficient feelings in medical personnel.

Today, the supply of qualified drinking water has become the main concern of the competent authorities. Drinking water, in addition to the appropriate quantity, must have appropriate standards regarding physicochemical and microbial properties. Nitrate and nitrite ions are of special importance due to their adverse environmental and health. The aim of this study was to determine the concentration of these ions in the drinking water of Evaz city and to perform calculations related to health risk assessment.

In this study, five points were selected and 50 samples (10 samples from each point) were collected over time intervals. After transferring the samples to the environmental chemistry laboratory, the concentration of nitrate and nitrite ions was determined by the spectrophotometer (DR6000) according to the instructions provided by the HACH.

The concentration of nitrate and nitrite ions in all parts of the network was lower than the standard set by the WHO. The highest and lowest concentrations of nitrate and nitrite ions were obtained at the sampling sites of Patrice Restaurant (1.04 and 0.021 mg/L) and ABFA (0.8 and 0.0162 mg/L), respectively. Also, risk assessment based on the age range of infants, children and adults was 0.125, 0.00375 and 0.043, respectively, which shows that long-term water consumption will not have a negative impact on human health.

The physicochemical quality of Evaz drinking water was acceptable and human exposure to this water has a non-carcinogenic risk of much less than the critical range.

Psychological factors have a significant impact on development of disruptions as well as work-related accidents. Improving mental conditions and paying attention to these factors can increase the health of employees. The aim of this study was to investigate the role of occupational stress and mental workload on job performance of hospital personnel.

The study population was the personnel of educational hospitals in Larestan (Lar, Khonj and Ewaz), among them 289 people were selected from all occupational units based on the census method. The instruments used in this study were demographic characteristics questionnaire, OSIPOW Questionnaire, NASA-TLX and Patersonchr('39')s Job Performance Questionnaire. For analyzing the data in SPSS-21 software, the Pearson correlation coefficient, Independent T-test and ANOVA were used.

The average age of participants was 34.16±8.52. The results of the study showed that the average total score of mental workload and occupational stress were 63.28±18.01 and 151.45±25.96, respectively. Also, the frequency distribution of stress level and job performance in most personnel showed that they were at the normal and medium levels. There was a significant relationship between job type and income with total score of mental workloads (p<0.05). Pearson correlation coefficient showed a significant relationship between performance and job stress (p<0.05). In the study of the relationship between job stress and demographic variables, a significant relationship was found between gender variables and job stress (p<0.05). The correlation coefficient of job performance with job stress in hospital staff showed that there was a significant inverse relationship between these two variables, so that, with increasing job stress, job performance decreased.

The results of the research showed that the mental workload of nurses is high compared to the other occupations and when the job stress increases, the personnel performance decreases.

Skin disease caused by exposure to the chemicals is one of the major health-related problems in the workplaces. This study has done to prioritize the strategies for skin exposure with chemical in a painting company.
Material and In this analytical cross-sectional study 7 criteria and 8 selection control methods were initially chosen by surveying the existing records and through the assessments of expert panel and checking the result of previous studies. Subsequently, control strategies were prioritized according to the criteria using Fuzzy Analytical Hierarchy process & Topsis. Results of the paired comparison showed that the safety of the control strategy (w=0.298) and it’s up to date (w=0.0138) were the most and least important criteria for skin control strategies. Among skin control strategies for chemical exposure, the highest and lowest importance were for training (w=0.817) and work-rest schedule (w=0.233), respectively. In this study, training was determined as the best control strategies for skin chemical exposure in the studied painting company according to the investigated criteria. This decision-making process could be applied for promotion of the skin health among workers

Heat stress is one of the most important occupational hazards that threaten the health of employees in many workplaces. This hazard is more important in the industries with hot processes, such as rubber industry. Therefore, control of this harmful agent is one of the essential measures and priorities of manager in these industries. The purpose of this study was to identifying and ranking the strategies of control exposure to heat stress using the Delphi method and the combination of FAHP and TOPSIS approach in the rubber industry.

This qualitative cross-sectional study was carried out in three stages. In the first step, the most important criteria and control measures of heat stress (alternatives) in the rubber industry were identified using the Delphi method. In the second stage, the criteria were weighted using the FAHP technique. Finally, alternatives were prioritized based on the TOPSIS method. Data analysis was performed using Excel and Super Decision Software.

The results of the paired comparison of the criteria with the FAHP technique showed that the “efficiency of control measure” was most important criteria with a relative weight of 0.141. Also, the final results of the study showed that among all control measures of heat stress in the rubber industry, “insulating or enclosing of heat source (insulation materials)” is the best with a relative weight of 0.582.

This study propose the integrated approach of Delphi, FAHP and TOPSIS in order to select the best strategies for controlling heat stress in the rubber industry. The results of this research can be used as the guidance for managers to making the scientific decisions and selecting the appropriate strategy for controlling heat stress in the rubber industry

Employees in hospitals and healthcare centers are exposed to a wide range of respiratory contaminants, such as biological and chemical contaminants. To protect employees against these hazards, it is necessary to use respiratory masks with appropriate protection factor. This study aimed to assess respiratory hazards risk to determine the protection factor of mask in one of the hospitals affiliated to Shiraz University of Medical Sciences.
In this cross-sectional study, initially Job Hazard Analysis (JHA) method was used to determine the groups and job duties including respiratory protection program. Then, protection factor of the required respiratory masks in the jobs including respiratory protection program was determined by the recommended method by Institut de recherche Robert-Sauvé en santé et en sécurité du travail (IRSST).
The results of this study showed that for the present number of respiratory contaminants in the hospital, N95/FFP2 respirators have not sufficiently degree of protection and it is essential to use respirators with higher protection factor such as full face PAPR (Powered Air-Purifying Respirator) or have helmet/hood with cartridge A1B1P3.
In situations where there is no possibility to measure and evaluate respiratory contaminants, especially biological contaminants that have no standard measurement methods and occupational exposure limit, using the qualitative (semi-quantitative) method presented by IRSST can be effective in determining the protection factor of mask and the type of respiratory mask.

In the tailoring occupation, the tailors take different posture for performing the activities such as sewing and repair of clothes. In this job, several factors such as physical, individual and mental factors can be affected on the awkward postures of the persons during the work. Therefore they are exposed to the risk the musculoskeletal disorders. The present study aimed to evaluate muscle fatigue and to determine some of the risk factors of musculoskeletal disorders.
This cross-sectional study was conducted on 165 tailors randomly selected in Shiraz. The required data were collected by using demographic characteristics, Nordic and general health questionnaires, and Muscle Fatigue Assessment (MFA) method. Then, the data were entered into the SPSS statistical software, version 21 and were analyzed using logistic regression and chi-square test .
Most of the study participants were male (79.4%) and married (75.2%). The highest prevalence of the musculoskeletal disorders symptoms were reported in the lower back (57%). Also, the highest percentage of the individuals placed in the action level 3 (high) based on the MFA method, was related to the lower back. In this study 63.6% of individuals had general health.
Marital status, posture, mental health, and working experience were the most important variables remained in the logistic regression model with an odds ratio were of greater than 1.21 in Tailors.

Knowledge, risk perception, and preparedness of individuals regarding earthquake have a vital role in the reduction of its consequences. This study was conducted to evaluate the level preparedness, knowledge, and risk perception regarding earthquake among the personnel of Shiraz University of Medical Sciences, Shiraz, Iran.
This cross-sectional study was conducted on 215 personnel of Shiraz University of Medical Sciences. The subjects were randomly selected. Data were gathered using a researcher-made questionnaire including demographic data, and risk perception, knowledge, and preparedness regarding earthquake. The collected data were analyzed in SPSS software. All P values of less than 0.05 were considered significant.
Findings: Most of the studied individuals were women (54%), had diploma and higher levels of education (85%), had 30-40 years of age (50%), and were married (75.3%). Most of them had an intermediate level of preparedness and risk perception and a high level of knowledge in regards to earthquake.
The subjects in this study had a high educational level, and due to their job and education, had received some training regarding earthquake preparedness. However, their level of earthquake preparedness was at an intermediate level. Since the earthquake preparedness level of the public is at a lower level, similar studies with greater sample size among the public are required in order to plan for the promotion of the present situation.

Background and Occupational fatigue is one of the main problems in work environments. Investigation of different aspects of occupational fatigue in drivers is of great benefit in reducing the level of road accidents.
We conducted a cross-sectional study in 420 drivers of heavy vehicles. Data was collected using a demographic and job information questionnaire and Swedish Occupational Fatigue Inventory (SOFI). T-Test and multivariate linear regression were applied for data analysis.
The average daily driving hours was found to be significantly associated with all dimensions of fatigue except for lack of energy (P Occupational fatigue in drivers has close relations with their habits and occupational activities. Modifying some negative behaviors such as smoking, inactivity, lack of attention to rest and continues driving can play major roles in incidence of occupational fatigue.