Occupational Noise-Induced Hearing Loss in Iran: A Systematic Review and Meta-Analysis.

Background: A large portion of Iranian Working Population (IWP) is becoming at risk of Occupational Noise-Induced Hearing Loss (ONIHL). Several primary studies have evaluated the prevalence of ONIHL in Iran with a variety of prevalence rates. We aimed to estimate the prevalence of ONIHL in the IWP using data from relevant studies. Methods: The present study is a meta-analysis and systematic review of previously published studies on ONIHL in Iran. Accordingly, the relevant articles published until Sep 1, 2021 were searched through Pub-Med, Scopus, and Google Scholar, together with Iranian scientific electronic databases. Heterogeneity between among the studies and data analysis was assessed using the I2 test and Random-Effect Model (REM) respectively. Results: Having performed a quality assessment, the meta-analysis was performed on the data from twenty-six studies involving a total of 85685 participants. The prevalence of ONIHL was observed to range from 12.9% to 60.5% in the reviewed studies. Moreover, after combining the results from the primary research by the Random Effects Model (REM) approach, the prevalence of ONIHL among IWP was estimated to be 34.69% (95% CI: 29.10, 40.28). Conclusion: ONIHL is a significant concern with regard to public and occupational health in Iran. The results also highlighted the urgent need for taking appropriate preventive and control measures in the work-places; particularly by encouraging the employers and health-related policymakers to focus on preventive noise control techniques along with administrative and legislative approaches to mitigate the risk of developing ONIHL.

The role of demographic, job-related and psychological characteristics on the prevalence of repetitive patient safety incidents among Iranian nurses.

BACKGROUND: Job-related psychosocial factors have a substantial effect on the occurrence of adverse events among healthcare professionals. OBJECTIVE: An analytical and descriptive survey was conducted to evaluate the relationship between the occurrence of patient safety incidents and psychological factors. METHODS: The study sample consisted of 177 nurses who were asked about patient safety events over six months. Repetitive patient safety incidents were selected by examining medical records and interviewing specialists. Also, psychological factors were assessed using job content questionnaire (JCQ). RESULTS: Repetitive patient safety incidents were involved medication administration error, pressure ulcer and skin-muscular injuries, patient falls, inability to CPR patients, blood transfusion reactions, and death due to human error. The findings showed that 92 participants (52%) had at least one case of patient safety incident. Among patient safety incidents, medication administration error and death due to human error had the highest and lowest repletion, respectively. Nurses training, job insecurity and peer support were significant predictors of different aspects of patient safety (p < 0.05). CONCLUSION: Proper collaboration between new and experienced nurses can have a significant impact to reduce patient safety incidents. In addition, nursing training can be a good way to understand risk points in medical errors.

Improvement of natural fiber's properties and evaluation of its applicability as eco-friendly materials in noise pollution control.

Purpose: The use of green and eco-natural fibers due to availability, biodegradability, reasonable cost, and non-toxic effects are known as potential acoustic materials in research. Nevertheless, in this area, the use of chemical treatment in natural fibers as an effective strategy to improve the overall properties and acoustic performance is faced with limitations. So that the current paper aims to investigate the effect of alkali treatment on the mechanical and acoustical properties of jute fibers and evaluation of its applicability in noise pollution control. Methods: To determine the effect of alkali treatment on the sound absorption behavior of jute fibers, a sufficient amount of both types of fibers (raw and treated) were used to the fabrication of acoustic samples with thicknesses of 30, 40 and 50 mm at a density of 200 kg/m3. The acoustic evaluation was measured by the Impedance tube system according to transfer function method using by the standard ISO 10534-2. The morphological and tensile properties of fibers were evaluated by the Scanning Electron Microscopy (SEM) and tensile test (ASTM C1557-14 standard). Moreover, Infrared Spectroscopy (FTIR) and X-ray diffraction (XRD) were used to study and compare the chemical properties of raw and treated fibers. Results: The result showed that the mean tensile strength and crystallinity index (CI) of treated fibers comparing with raw fibers increased by 61.66% and 3.26% respectively. The use of Alkali treatment helped to improve sound absorption performance of jute fibers with different thicknesses. Furthermore, noise reduction rate (NRC) in treated acoustic samples compared to untreated with a thickness of 50 mm increased from 0.66 to 0.69. Conclusion: Finally, the alkali treatment has enhanced the properties of jute fibers and confirmed the applicability of these fibers in acoustic absorption. Supplementary Information: The online version contains supplementary material available at 10.1007/s40201-022-00799-x.

The effect of traffic noise on cognitive performance with regard to personality traits: A laboratory experiment study.

BACKGROUND: Exposure to traffic noise could play an important part in inducing psychological disorders which in turn can affect individuals' cognitive and mental performance. OBJECTIVE: The aim of this study was to determine the effect of traffic noise exposure on the cognitive performance with regard to subjects' personality traits. METHODS: Sixty students with normal hearing and vision took part in this experimental study. In order to simulate the traffic noise condition of Tehran, the noise from several busy streets was first carefully recorded. Later on, the subjects were exposed to this recorded noise in an anechoic chamber. Also, the NEO-five factor inventory questionnaire and the continuous performance test were used to assess personality traits and cognitive performance of participants respectively. RESULTS: The results showed that the cognitive features of the study, such as reaction time and the number of commission/omission errors in continuous performance testing increased significantly after exposure to the traffic noise (p < 0.05), and among the personality traits, only the neuroticism has a significant correlation with response time in the continuous performance tests (p < 0.05). CONCLUSIONS: Apart from the effect of traffic noise on cognitive function, the findings of this study confirmed that Neuroticism (one of the personality traits) also significantly affect the cognitive performance of individuals when they are exposed to traffic noise in laboratory conditions.

Relationships Between Job Satisfaction and Job Demand, Job Control, Social Support, and Depression in Iranian Nurses.

BACKGROUND: Nurses often experience a wide variety of stressful situations. Excessive work stress influences the physical and mental health of nurses and decreases their life quality and professional efficacy. In addition, high levels of psychological stress may cause job dissatisfaction and job strain. PURPOSE: The objective of this study was to explore the relationship between several work-related risk factors and job satisfaction in Iranian nurses. METHODS: A cross-sectional study was conducted on 730 nurses from four public hospitals in, respectively, northern, southern, eastern, and western Iran. Variables in the job demand-control-support (JDCS) model were measured using the Job Content Questionnaire, and job satisfaction was measured using the Minnesota Satisfaction Questionnaire. RESULTS: The mean score for job satisfaction was 62.94 ± 14.24, which is considered moderate. Nurses with a low level of job satisfaction had significantly higher psychological and physical job demands (p < .05). Significant relationships were found between job satisfaction and several dimensions of the JDCS model, including psychological job demands (ß = -0.11, p < .001), physical job demands (ß = -0.86, p = .004), skill discretion (ß = 0.48, p = .033), decision authority (ß = 0.43, p = .028), and supervisor support (ß = 1.85, p = .004). The sociodemographic and JDCS model variables used in this study explained 42% of the variation in job satisfaction (R2 = .42). CONCLUSIONS/IMPLICATIONS FOR PRACTICE: Enhancing the job satisfaction of nurses is possible by creating a balance between job demands, job control, and social support.

Effect of long-term occupational exposure to extremely low-frequency electromagnetic fields on proinflammatory cytokine and hematological parameters.

Purpose: The present study aimed to investigate the effect of extremely low-frequency electromagnetic fields (ELF-EMFs) on proinflammatory cytokines and hematological parameters, among the employees of a power plant, which are one of the most important occupational groups exposed to ELF-EMFs extensively.Materials and methods: The studied population included 112 employees of a power plant as the exposed group and 138 unexposed employees who were enrolled based on inclusion and exclusion criteria. The magnetic flux density and the strength of the electric field were determined by spot measurements and according to the IEEE C95.3.1 standard. Proinflammatory cytokines including serum interleukin-1ß (IL-1ß), interleukin-6 (IL-6), and tumor necrosis factor-α (TNF-α); and hematologic parameters of all subjects were measured.Results: The mean level of IL-1ß and IL-6, white blood cell count (WBC) and red blood cell count (RBC), lymphocyte percentage (Lym%), mean corpuscular volume (MCV), platelet count (PLT) and procalcitonin (PCT) were significantly more in the exposed group, than the unexposed group. The mean serum levels of IL-6, IL-1ß and some of the hematological parameters including WBC, lymphocyte, RBC and hematocrit were higher in technicians which had the highest level of exposure to magnetic fields compared to other groups and these relations were linear.Conclusions: Long-term exposure to ELF-EMFs probably affects immune responses, by stimulating the production of proinflammatory cytokines, and increasing some hematological parameters.

The associations of workload, individual and organisational factors on nurses' occupational injuries.

AIMS AND OBJECTIVES: To determine the prevalence and type of occupational injuries in nurses and their associations with workload, working shift, and nurses' individual and organisational factors. BACKGROUND: Nurses are vulnerable to occupational injuries due to the nature of their job. DESIGN: A cross-sectional correlational design (based on STROBE Statement) was conducted. METHODS: This study was conducted among 616 nurses of four public hospitals located in four different provinces in Iran. Data were collected using three questionnaires including an organisational and demographic questionnaire, an occupational injuries checklist and the NASA-TLX questionnaire (about mental workload). Chi-square test, one-way ANOVA and multivariate logistic regression were used in SPSS version 23.0 for statistical analysis. RESULTS: Blood and body fluid exposures had the highest prevalence (47.4%) among all injuries. Needlestick injuries showed a significant relation with gender, age, number of shifts in a month and work experience. With increase in mental workload, needlestick injuries increase by 35%. Also, injuries reported by nurses working in rotating shifts were 15%-53% more than nurses working in fixed shifts. CONCLUSION: Working in rotating shifts and work overload was significantly related to all injuries. Decreasing nurses' mental workload, introducing guidelines and efficient training in shift work schedules can help decrease occupational injuries among nurses. RELEVANCE TO CLINICAL PRACTICE: In order to reduce occupational injuries among nurses, in addition to incorporating advanced management and technology, it is necessary to pay attention to psychosocial, individual and organisational risk factors related to occupational injuries and their frequency in nurses. Also, reducing personnel's mental and occupational pressure should be considered.

Serum Homocysteine Level in Parkinson's Disease and Its Association with Duration, Cardinal Manifestation, and Severity of Disease.

BACKGROUND AND PURPOSE: Due to the high prevalence of Parkinson's disease (PD) in the elderly, a large financial burden is imposed on the families and health systems of countries in addition to the problems related to the mobility impairment caused by the disease for the patients. Studies on controversial issues in this disease are taken into consideration, and one of these cases is the role of serum homocysteine level in Parkinson's patients. In this study, the serum level of homocysteine and its association with various variables in relation to this disease was compared with healthy individuals. MATERIALS AND METHODS: In this study, 100 patients with PD and 100 healthy individuals as control group were investigated. Serum homocysteine level and demographic and clinical data were included in the checklist. Data were analyzed by SPSS version 23. In all tests, the significance level was below 0.05. RESULTS: The mean level of serum homocysteine in case and control groups was 14.93 ± 8.30 and 11.52 ± 2.86 µmol/L, respectively (95% CI: 1.68; 5.14, P < 0.001). In total patients, 85 had normal serum homocysteine level, while 15 had high serum homocysteine level. In controls, the homocysteine level was 98 and 2, respectively (P=0.002). In multivariate logistic regression analysis, serum homocysteine level higher than 20 µmol/L was accompanied by 8.64-fold in Parkinson's disease involvement (95% CI: 1.92; 38.90, P=0.005). CONCLUSION: Increasing serum homocysteine level elevates the rate to having PD. Serum homocysteine levels did not have any relationship with the duration of the disease, type of cardinal manifestation, and the severity of Parkinson's disease.

Evaluating the relationship between job stress and job satisfaction among female hospital nurses in Babol: An application of structural equation modeling.

Background: This study was designed to investigate job satisfaction and its relation to perceived job stress among hospital nurses in Babol County, Iran. Methods: This cross-sectional study was conducted on 406 female nurses in 6 Babol hospitals. Respondents completed the Minnesota Satisfaction Questionnaire (MSQ), the health and safety executive (HSE) indicator tool and a demographic questionnaire. Descriptive, analytical and structural equation modeling (SEM) analyses were carried out applying SPSS v. 22 and AMOS v. 22. Results: The Normed Fit Index (NFI), Non-normed Fit Index (NNFI), Incremental Fit Index (IFI)and Comparative Fit Index (CFI) were greater than 0.9. Also, goodness of fit index (GFI=0.99)and adjusted goodness of fit index (AGFI) were greater than 0.8, and root mean square error of approximation (RMSEA) were 0.04, The model was found to be with an appropriate fit. The R-squared was 0.42 for job satisfaction, and all its dimensions were related to job stress. The dimensions of job stress explained 42% of changes in the variance of job satisfaction. There was a significant relationship between the dimensions of job stress such as demand (ß =0.173,CI =0.095 - 0.365, P≤0.001), control (ß =0.135, CI =0.062 - 0.404, P =0.008), relationships(ß =-0.208, CI =-0.637- -0.209; P≤0.001) and changes (ß =0.247, CI =0.360 - 1.026, P≤0.001)with job satisfaction. Conclusion: One of the important interventions to increase job satisfaction among nurses maybe improvement in the workplace. Reducing the level of workload in order to improve job demand and minimizing role conflict through reducing conflicting demands are recommended.

Effects of patient-handling and individual factors on the prevalence of low back pain among nursing personnel.

BACKGROUND: Patient-handling is one of the main tasks of nursing personnel; it imposes compressive and shear forces on nurses' lower spine. The aim of this study was to determine the prevalence of Low Back Pain (LBP), risk factors in the incidence of such disorders, and patient handling risk assessment among nursing personnel. METHODS: This study was carried out on 243 randomly selected nursing personnel who played a role in handling the patients (58 wards). Patient Transfer Assessment Instrument (PTAI) checklists alongside Standardized Nordic Musculoskeletal Questionnaires (NMQ) were used for data collection. The statistical analyses such as independent t-test and Chi-Square test were used. RESULTS: Prevalence of LBP among nursing personal was 69.5% in the previous 12 months. Significant correlations were found among age, working hours per week, work experience, BMI, gender and shift-work. Results of PTAI index assessment revealed that more than 90% of subjects were in medium and severe risks of LBP. PTAI index scores were significantly associated with LBP (P < 0.05). CONCLUSION: PTAI index is regarded as an efficient tool for risk level classifications and identification of effective factors on LBP incidence among nursing personnel involved in patient transfer. In this regard and for the aim of ergonomic intervention towards the reduction of LBP incidence among nurses, the modification of improper factors which are identified in PTAI index such as the use of advanced patient handling equipment, increase in work posture guidance and work arrangements, can be mentioned.