Showing 318 results for Type of Study: Research
Faramarz Gharagozlou, Jebraeil Nasl Saraji, Adel Mazloumi, Ali Nahvi, Ali Motie Nasrabadi, Abbas Rahimi Foroushani, Mohammadreza Ashouri, Mehdi Samavati,
Volume 1, Issue 1 (9-2013)
Abstract
Introduction: Driver fatigue is one of the major causes of
accidents in roads. It is suggested that driver fatigue and drowsiness
accounted for more than 30% of road accidents. Therefore, it is important to
use features for real-time detection of driver mental fatigue to minimize
transportation fatalities. The purpose of this study was to explore the EEG
alpha power variations in sleep deprived drivers on a car driving simulator.
Materials and Methods: The present descriptive-analytical study was
achieved on nineteen healthy male car drivers. After taking informed written
consent, the subjects were requested to stay awake 18 hrs before the
experiments and refrain from caffeinated drinks or any other stimulant as well
as cigarette smoking for 12 hrs prior to the experiments. The drivers sleep
patterns were studied through sleep diary for one week before the experiment.
The participants performed a simulated driving task in a 110 Km monotonous
route at the fixed speed of 90 km/hr. The subjective self-assessment of fatigue
was performed in every 10 minute interval during the driving using Karolinska
Sleepiness Scale (KSS). At the same time, video recordings from the drivers
face and their behaviors were achieved in lateral and front views and rated by
two trained observers. Continuous EEG and EOG records were taken with 16
channels during driving. After filtering and artifact removal, power spectrum
density and fast Fourier transform (FFT) were used to determine the absolute
and relative alpha powers in the initial and final 10 minutes of driving. To
analyze the data, descriptive statistics, Pearson and Spearman coefficients and
paired-sample T test were employed to describe and compare the variables.
Results: The findings showed a significant increase in
KSS scores in the final 10 minutes of driving (p<0.001). Similar results
were obtained concerning video rating scores. Meanwhile, there was a
significant increase in the absolute alpha power during the final section of
driving (p=0.006).
Conclusion: Driver mental fatigue is considered as one of
the major implications for road safety. This study suggests that alpha brain
wave rhythm can be a good indicator for early prediction of driver fatigue.
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Hadi Daneshmandi, Alireza Choobineh, Abdolreza Rajaei Fard,
Volume 1, Issue 1 (9-2013)
Abstract
Introduction: The
psychological health is important factor in productivity of workforce and this parameter
is effective on maximum aerobic capacity. This study was conducted to
investigation of association between of psychological health and maximum
aerobic capacity and determination of effective factors on general health in
male workers of industrial sector of Shiraz city.
Materials and Methods: In
this cross-sectional study, 500 male workers employed in Shiraz city industries
participated voluntarily (age range= 20 to 59 years). The demographic
questionnaire (including demographic/occupational and anthropometric (height,
weight and BMI) and physiological (maximum aerobic capacity) characteristics)
and General Health Questionnaire (GHQ-28) were used as data collecting tools.
Data were analyzed using statistical tests including T-test and Pearson Correlation
by SPSS software (Version 16.0).
Results: Mean
(standard deviation) of total score of general health and maximum aerobic
capacity of workers were 17.00 (9.99) and 35.95 (7.39) ml.kg-1.min-1,
respectively. Statistical analysis revealed significant association between job
tenure, BMI, marital status, educational level and shift working with general
health. Also, the results showed that there was significantly association
between "anxiety and insomnia" subscale and total score of general
health with maximum aerobic capacity.
Conclusion: General health was
significantly associated with maximum aerobic capacity, job tenure, BMI,
marital status, educational level and shift working in studied workers.
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Farshid Ali Arabian, Majid Motamedzade, Rostam Golmohammadi, Abbas Moghim Beigi, Fereshteh Pir Hayati,
Volume 1, Issue 1 (9-2013)
Abstract
Introduction: One of the major problems in hospitals
leading to high prevalence of musculoskeletal disorders among the health staff
is associated with patients handling. This study was aimed to reduce
musculoskeletal disorders using ergonomic intervention among Nahavand
Alimoradian hospital staff.
Material and Methods: This study was conducted in four wards of
160-bed Nahavand Alimoradian hospital. The data collecting tool was Nordic
Musculoskeletal Questionnaire. SPSS software was used for data analysis. The
questionnaire was completed, before and after educational intervention, for 46
employees of the four wards which had the most complaints about musculoskeletal
disorders. Training classes were held
for the target group covering prevention of work-related musculoskeletal
disorders, proper techniques for patient handling and stretching exercises for
low back pain prevention.
Results: The main results tended to be the high
prevalence of musculoskeletal disorders especially in low back, shoulders and
wrists of the employees. Low back pain was the most prevalent disorder among
the personnel. The educational intervention had not significant effect on
lessening the musculoskeletal disorders in hospital staff (p > 0.05).
Conclusion: At
present, regarding enhancements in healthcare procedures, there is an urgent
need to ergonomic intervention in the design of environment, tools and
equipment concurrent with educational intervention.
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Mostafa Barzideh, Alireza Choobineh, Sayed Hamidreza Tabatabaei,
Volume 1, Issue 1 (9-2013)
Abstract
Introduction: Job stress can influence job turnover in organizations. Little data is
available on job stress dimensions and their relationship to job turnover among
Iranian nurses. The aims of this study were investigating job stress dimensions
and examining their relationship to job change intention among nurses.
Materials and Methods: In this cross-sectional study, 385 randomly selected nurses from hospitals
of Shiraz University of Medical Sciences participated. The Persian version of
Job Content Questionnaire (P-JCQ) and demographic questionnaires were used for
data collection. Using SPSS (version 11.5) software, descriptive statistics and
Mann-Whitney U test were applied for data analysis.
Results: The means (SD)
of decision latitude, psychological job demands, social support, physical job
demands and job insecurity were found to be 58.15 (6.50), 38.19 (5.14), 22.67
(3.67), 16.03 (2.58) and 7.74 (3.85), respectively. The results revealed that
decision latitude and social support dimensions had low levels, but psychological
and physical job demands as well as job insecurity dimensions had high levels
among the study subjects. The findings showed that 56.4% of the subjects
intended to change their jobs. The mean score of all job stress dimensions had
significant relationship with job turnover.
Conclusion: The
majority of subjects were exposed to high levels of job stress and most of
nurses intended to change their jobs. Based on the results, any interventional
program for minimizing job turnover should focus on reducing job insecurity and
physical job demands as well as increasing decision latitudes and social
support among nurses
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Seyed Abolfazl Zakerian, Marzieh Abbasinia, Farugh Mohammadian, Asad Fathi, Abdolrasoul Rahmani, Iman Ahmadnezhad, Mehdi Asghari,
Volume 1, Issue 1 (9-2013)
Abstract
Introduction: While great efforts have been made to determine the quality of life in
hospital staffs, few studies have been conducted to identify the effective
factors on the quality of life of these employees. The purpose of the present
study was to investigate the relationship between workload and quality of life
in hospital personnel.
Material and Methods: In this descriptive-analytical study, 200 staffs were selected randomly
from two large hospitals of Tehran University of medical sciences (Imam
Khomeini and Shariati hospitals). The data collecting tools were three
questionnaires including demographic characteristics,
quality of life (SF-36), and NASA-TLX workload. SPSS software (version 18.0)
was used to analyze the data by descriptive statistics, and Pearson and
Spearman correlation tests.
Results: Based on the
findings of the study, the mean total scores of the quality of life and the
workload were 50±18 and 69.7±13.9, respectively. The results revealed
significant reduction in all dimensions of quality of life in nurses compared
with laboratory and operating room staffs. Meanwhile the nurses’ workload
scores were higher than the two aforementioned groups (p = 0.001). Moreover,
there was a significant inverse relationship between workload and quality of
life in hospital staffs (P=0.004, r = -.306).
Conclusion: The
results of this study highlight the role of managers and supervisors in the
implementation of efficient interventions for improving the quality of life and
workload. Therefore, further researches are required to identify other factors
that affect the quality of life and workload in hospital staffs.
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Fatemeh Seif, Tahereh Yektaee, Mostafa Pouyakian,
Volume 1, Issue 1 (9-2013)
Abstract
Introduction: Lack of attention to the ergonomic measures
and standards in making PowerPoint slides can result in visual fatigue, less
attention to the content of the lecture and lower quality of training. This
study aimed to identify the most popular Persian fonts and font sizes used by
students in making PowerPoint slides and to investigate the students'
subjective perception of the three features of legibility, formality and
attractiveness of these fonts.
Materials and Methods: At first, five most widely used
Persian fonts in providing PowerPoint slides were identified in 84 students
from Tehran University of Welfare and Rehabilitation Sciences. Then, ten slides
were prepared containing simple and familiar sentences based on the five
popular fonts and two Different font sizes (24 and 28). Afterwards.40 college
students evaluated the eligibility, formality and attractiveness of the fonts
and font sizes used in each slide by a seven-item Likert scale.
Results: One-way ANOVA Revealed significant
differences between the students' subjective perception of legibility,
formality and attractiveness of the fonts used in the slides. In terms of
eligibility and attractiveness, slide 10 (B Titr, 28) was top rated and slide 4
(lotus, 24) was ranked as lowest by the participants. In terms of eligibility
and attractiveness, slide 10 (B Titr, 28) was top rated and slide 4 (lotus, 24)
was ranked as lowest by the participants.
Conclusion: This
study explored the effects of anatomical characteristics of the B Nazanin, B
Titr and Lotus Persian fonts on the Students’ perception of legibility,
formality and attractiveness. The findings suggested that the type of Selected
font in PowerPoint slide design could influence the viewers’ perceptual
features of legibility, attractiveness and formality. Thus, disregarding the
ergonomic aspects of selected Persian fonts may deteriorate the quality of
training. Further studies are needed to examine the ergonomics aspects of wider
types of Persian fonts in broader sample sizes.
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Shirazeh Arghami, Abolfazl Ghoreishi, Koorosh Kamali, Masoud Farhadi,
Volume 1, Issue 1 (9-2013)
Abstract
Introduction: Mental fatigue is defined as body or soul
tiredness which can be caused by stress, overwork, excessive use of drugs or
physical or mental illnesses. Fatigue is one of the reasons of productivity
loss as well as occurring accidents. Therefore, mental fatigue measurement is
of great importance. This study was aimed to determine the consistency of
mental fatigue measurement by self-reported VAS and the flicker fusion
apparatus.
Material and Methods: A descriptive study was conducted on 30 students.
After they had accomplished mental tasks (i.e. mathematical problem solving and
responding to MMPI questionnaire), mental fatigued was measured by
self-reported VAS and flicker fusion apparatus. To analyze the results, paired
sample T-test and Spearman correlation test were applied in SPSS software
version 11.5 (P<0.05).
Findings: The results of mental fatigue measurements by
both methods of self-reported VAS and the flicker fusion apparatus showed
significant increase in mental fatigue after finishing each of the mental
tasks. But the findings revealed no consistency between the two methods.
Conclusion: Since
self-reported VAS is a subjective technique, it seems that the lack of
consistency between the two methods is due to its inefficiency in the mental
fatigue measurement. Therefore, further studies with more precise methods such
as EEG is suggested.
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Mahtab Azizi, Zeinab Baroony Zadeh, Majid Motamedzade,
Volume 1, Issue 1 (9-2013)
Abstract
Introduction: Musculoskeletal disorders are amongst
dominant occupational injuries and disabilities in developed and developing
countries. The RULA technique is one of the best methods for assessing upper
limbs postures. The purpose of this study was to investigate the working postures
using RULA and ergonomic interventions in the quality control unit of a glass
manufacturing company.
Material and Methods: This interventional study was conducted in
the mirror control workstations of a glass manufacturing company. To assess
workers’ postures, the RULA technique was applied before and after the
intervention. After data analysis, corrective engineering measures were
recommended and implemented in all workstations.
Results: The findings showed that 40% of workers had a
grand score of 7, 40% with a grand score of 6 and 20% with a grand score of 5.
Accordingly, 60% of workstations were in action level of 3 (i.e. investigation
and changes are required soon) and 40% of workstations were in action level of
4 (i. e. investigation and changes are required immediately). After
intervention, 20% of workstations were in action level of 3 and 80% were in
action level of 2.
Conclusion: To
prevent musculoskeletal disorders, increase work efficiency and improve
workforce health, with positive interaction of research team and remarkable
cooperation of company management, engineering interventions were designed and
implemented at all workstations and the risk level was reduced efficiently.
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Alireza Choobineh, Hadi Daneshmandi, Maryam Parand, Rezvan Ghobadi, Abdollah Haghayegh, Froogh Zare,
Volume 1, Issue 2 (12-2013)
Abstract
Introduction: Regarding to the competing and increasing competitions in organization and markets, paying attention to manpower and his quality of work life have progressively become important. This study was conducted with the objective of investigating of quality of working life and determination of its related factors in Shiraz University of Medical Sciences (SUMS) staff.
Material and Methods: In this cross-sectional study, 218 employees of SUMS participated voluntarily. A questionnaire consisted of two parts was used as data collecting tool. In the first part, demographic and occupational characteristics, and in the second part questions about the quality of working life were included. Data were analyzed using statistical tests including Pearson Correlation, Kruskal-Wallis and Mann-Whitney U by SPSS software (Version 16.0).
Results: Mean and standard deviation scores for the quality of working life of staff were 127.51±16.61. The results showed that there were associations between gender and income with quality of work life score (p<0.05), such that the quality of work life scores of women and high-income individuals were higher than those of men and lower- income staff. Age, job tenure, marital status, number of children, level of education, type of employment and job unit had no association with quality of work life score.
Discussion: In this study, quality of work life had association with gender and income level of staff.
Ghasem Hesam, Mohsen Aliabadi, Maryam Farhadian, Vahid Afshari Doust,
Volume 1, Issue 2 (12-2013)
Abstract
Background: The use of visual monitors especially in relation to computer can cause health effects which have negative impacts on mental and physical performance of users. This study aims to determine the relation between ergonomic conditions in use of visual monitors and subjective feeling of fatigue in master science students as permanent users.
Methods: In this study, 40 students in the Hamadan University of Medical Scienceswere selected based onsimplerandomapproach. For determining subjective feeling of fatigue, the standard questionnaire with reliability coefficient equal to 0.8 was distributed and completed among students. This questionnaire has 30 questions which was covered three criteria included drowsiness, difficulty of concentration and physical impairment. The data about environmental and ergonomic conditions of the workstations was also recorded. Exposure to electromagnetic radiation in very low frequency was measured using instrument model HI 3603 front of the studied monitors. Data was analyzed with SPSS 16 software.
Results: The results showed mean score of drowsiness, difficulty of concentration and physical impairment were 17.8±6.5, 18.7±4.4 and 11.9±6.9, respectively. Totally, mean score feeling of fatigue was 48.5±15.7. The relation between continuous work time and feeling of fatigue was significant (P<0.05).The relation between work day time and feeling of fatigue was not significant (P>0.05). The relation between type of used monitor and feeling of fatigue was significant (P<0.05). Moreover, the relation between environmental conditions of the workstations and feeling of fatigue was not significant (P>0.05). However, descriptive results showed growing trend of feeling of fatigue in unsuitable environmental and ergonomic conditions. Moreover, exposure to electromagnetic radiation between to type monitors was statistically difference (P<0.05).
Conclusion: Criterion of difficulty of concentration was allocated the maximum score of feeling of fatigue which can cause negative impacts on educational performance. Compliance with the ergonomic principles especially reduction continuous work time and use of updated monitors and optimization of lighting and acoustic conditions of the workstations can reduce feeling of fatigue among students, considerably.
Mehdi Jahangiri, Keyvan Sareban Zadeh, Oranoos Bashar, Hamze Saleh Zade,
Volume 1, Issue 2 (12-2013)
Abstract
Background Given the breadth and diversity of construction activities and their hazards, it is at the top of accident cause lists. According to the supervisor's role in safety and prevention of accidents at construction sites, this study was conducted to study the risk perception, safety attitude and safety performance in the supervisors of construction sites in Shiraz city. Methods This cross-sectional descriptive study was conducted on 200 supervisors who agreed to participate in the study. The study was by conducted using a structured questionnaire consist of questions regarding general information, risk perception, safety attitude and safety performance. The questionnaire was completed through self-statement. Results All studied supervisors had medium and high risk perception (35.5 and 64.5% respectively), medium and high safety attitude (78.6 and 21.4% respectively), medium and high safety performance (41.4 and 58.6% respectively). Among studied variables, size of construction site, had positive and significant effect on safety performance of supervisors. Conclusions The result of this study showed that there is a significant relationship between risk perception and safety attitude with safety performance among supervisors in construction sites. Somehow, by increasing safety attitude in supervisors, their safety performance were increased too.
Zohreh Karami, Rostam Golmohammadi, Ahmad Heydari Pahlavian, Rashid Heydari Moghaddam, Jalal Poorolajal,
Volume 1, Issue 2 (12-2013)
Abstract
This before-after clinical trial investigated the effect of daylight on morning and night melatonin, subjective general health using GHQ questionnaire, sleepiness and alertness on elderly who lived in nursing houses.
Nineteen nursing home residents participated voluntarily. They exposed to daylight from 9 to 10 A.M. and from 4 to 5 P.M. for 6 weeks. General health of all participants was evaluated using general health questionnaire (GHQ) as well. Also we used of KSS and VAS questionnaire foe assessment of sleepiness and alertness.
Baseline morning and night melatonin levels were 25.39 (±19.75)pg/ml, and 40.3 (±21.55)pg/ml respectively. Daylight exposure significantly affected morning melatonin at 7:00 A.M. but had no significant effect on night melatonin at 8:00 P.M. Mean score of general health changed 36.31 to 29.89 (P=0.003). Karolinska sleepiness scale (KSS) and Visual Analogue Scale (VAS) showed increase sleepiness and decrease alertness from 3:00 to 7:00 A.M. Sleepiness decreased and alertness increased during 1:00 P.M and 20:00 P.M.
Overall day light exposure may delay sleep phase and circadian rhythm problems in elderly people. Anxiety and insomnia could be improved with daylight exposure. Our findings suggest that elders should be exposed to scheduled daylight in morning and evening for prevention and improvement of mental disorders. Adequate light should be provided for elder’s homes and nursing house. We have proposed to further study with a larger sample size be done to assess effect of daylight on GHQ' subscales.
Narmin Hassanzadeh Rangi, Ali-Asghar Farshad, Majid Motamedzade, Yahya Khosravi, Sakineh Varmazyar,
Volume 1, Issue 2 (12-2013)
Abstract
Introduction: Musculoskeletal disorders (MSDs) are the main causes of work related injuries and disabilities in developed as well as developing countries. Few studies have considered different interactive effects of individual and work-related factors on MSDs, simultaneously. Methods and Materials: Data were gathered by Nordic questionnaire and Quick Exposure Check (QEC) method and were analyzed using logistic regression model in order to study the correlation between the prevalence and intensity of MSDs and individual and work-related factors. Results: More than half of all participants (61.6%) reported suffering from one form of MSDs during the past 6 months. Results showed that risk factors such as work stress, sleeping position, lifestyle and poor posture had an important role in the prevalence and intensity of MSDs. Discussion: The effect of a risk factor is constantly in interaction with other risk factors, and is modified by other factors. Participatory ergonomic intervention programs, work station intervention, ergo stress intervention and life-style interventions were suggested in order to decrease the prevalence and intensity of MSDs.
Mahdi Mohammadian Mastan, Majid Motamedzade , Javad Faradmal,
Volume 1, Issue 2 (12-2013)
Abstract
Introduction: Three methods of OCRA Index, Strain Index and ACGIH HAL are proposed to assess risk factors of upper extremity musculoskeletal disorders. These methods are important in work environments to evaluate musculoskeletal disorders. Thus the aim of this study is to determine the correlation between the results of the above mentioned methods.
Materials and Methods: In this cross - sectional study, a total of 150 job tasks studied in four industries . For each task, not only video taping was used to record the duration of a full cycle but also tasks were evaluated according to instructions. The correlation coefficient and the coefficient of agreement were analysed using SPSS16 and R software.
Results: Correlation between the results of risk assessment methods OCRA and SI for right and left hand, were acceptable correlation (0.751) and (0.726) respectively. Also the result of agreement between the methods OCRA and HAL for right and left hands, were (0.526) and (0.595) respectively.
Conclusion: This study showed that none of the two methods do not fully agree. One of the source of differences is the number and types of variables and their effects on the final score of the methods.
Mohsen Aliabadi, Neda Mahdavi, Maryam Farhadian, Masoud Shafie Motlagh,
Volume 1, Issue 2 (12-2013)
Abstract
Introduction: Noise pollution cause mental fatigue, concentration disturbance and learning loss in students during the training activities. This study aims to evaluate Noise pollution and the level of acoustical comfort in typical classrooms, and present treatment methods for improving acoustic comfort.
Method: In cross sectional study, twenty classrooms in the seven faculty of Hamadan University of medical sciences, were studied using questionnaire with reliability coefficient equal to 0.8 was completed among 413 students. Measurement of noise level was performed using sound level meter (model TES-1358) according ANSI S12.6 in classrooms.
Result : The results showed the background noise level and outdoor noise level were equal 46.97 ± 3 dB(A), and 57.16 ± 4.8 dB(A) , respectively. The background noise was higher than the recommended limit equal to 45 dB(A) (P<0.01). The construction activities are most important annoying factor and concentration disturbance are most complication of noise. Signal to noise ratio within the classroom was 13.14±3.54 dB (A), which was inappropriate compared with the recommended limit 15 dB (A) (P<0.01). The difference in speech intelligibility at various levels of signal to noise ratio was significant (p<0.05).
Conclusion: The results confirmed the studied classrooms haven’t acceptable acoustic conditions and background noise level was affected by outdoor noise. In regard to confirmation of the effects of noise on the student attention, the acoustic interventions is must be considered.
Behzad Karami Matin, Azar Mehrabi Matin, Mansour Ziaei, Zeinab Nazari, Hamed Yarmohammadi, Faramarz Gharagozlou,
Volume 1, Issue 2 (12-2013)
Abstract
Background and aim: the workers in Quarry and Stone Industries done frequently some duties including lifting and carrying of heavy loads and they are exposed to high risk of cumulative trauma disorders. The aim of this study was to comparing the prevalence of musculoskeletal disorders and risk of work postures in Quarry and Stone Industries workers.
Material and methods: this cross-sectional and analytical study was done on 63 workers of Stone Industries and 46 workers of Quarries in Kermanshah. Data were collected using by Nordic standard questionnaire, Body map chart and REBA method. The gathered data was been analyzed by Independent t-test, Mann-Whitney, Spearman and Pearson tests. P was 0.05.
Results: The most prevalence of musculoskeletal disorders in both Stone and Quarry industries was related to low back that was 54% and 39% respectively. Mean and standard deviation of final scores of REBA in Stone and Quarry workers were 9.06±1.45 and 4.6±1.18 respectively. Results shows that a significantly correlation between age, work history and BMI with musculoskeletal disorders in Stone Industries and between age and work history with this disorders in Quarries (P<0.05).
Conclusion: the results shows that the risk level of REBA and prevalence of musculoskeletal disorders of Stone Industries was more than Quarries in shoulder, wrist, hand, lumbar, femur, knee, leg and ankle.
S.abolfazl Zakerian, Gholam Teymouri, Iman Ahmadnejad, Marziyeh Abbasinia, Abdorasoul Rahmani, Mahdi Asghari,
Volume 1, Issue 3 (3-2014)
Abstract
Introduction: The present study was aimed to investigate the dimensions of quality of work life and its relation to job satisfaction among workers of automotive industry.
Materials and Methods: In this descriptive-analytical study, 150 workers of an automotive industry in Tehran city were chosen by simple random sampling method. Three questionnaires of demographic characteristics, quality of work life and job satisfaction were employed as data collecting tools. For data analysis, descriptive statistics, t-test, analysis of variance (ANOVA), correlation and regression tests were used.
Results: About 6% of participants evaluated their workload as light, 11.3% as moderate, 60.7% as heavy, and 22% as very heavy. The average of job satisfaction was 55.94± 13.45. 15.3% of subjects had low job satisfaction, 68.7% moderate and 16% reported high job satisfaction. There was a positive and significant relation between quality of work life and job satisfaction (p = 0.001). Meanwhile, general health condition had the highest effect on job satisfaction.
Conclusion: In general, there was a positive and significant relation between the quality of work life and job satisfaction, so that the higher the quality of work life, the higher the job satisfaction of workers. The results also emphasize the role and impact of managers and supervisors for effective interventions to improve quality of work life and job satisfaction. Therefore, further studies are proposed for the identification of other effective factors on the quality of work life and job satisfaction.
- Javad Tayefe Rahimian, - Alireza Choobineh, - Naser Dehghan, - Rana Tayefe Rahimian, - Hadi Kolahi, - Mostafa Abbasi, - Mojtaba Abbaszadeh,
Volume 1, Issue 3 (3-2014)
Abstract
Introduction:
Musculoskeletal disorders (MSDs) represent one of the leading causes of
occupational injury and disability in the developed and industrially developing
countries. This study was conducted to investigate the prevalence of MSDs and
evaluate the risk of these disorders among
welders of a steel manufacturing industry.
Materials
and Methods: This descriptive-analytical study was achieved on all
243 welders employed in a steel manufacturing industry. Nordic Musculoskeletal
Questionnaire (NMQ) was used to study the prevalence of MSDs. Meanwhile, QEC
technique was employed to evaluate the risk of exposure to these disorders. For
data analysis, central statistical indices, T-test and Chi-square test were used.
Results: The results
suggested the highest prevalence of symptoms of musculoskeletal disorders in
low back, trunk and knees, respectively. QEC technique showed a high and very
high risk of exposure to MSDs in 64.6 %
of welders.
Conclusion: This study demonstrated that the prevalence of WMSDs in welders under
study was high. Based on the obtained results, the most significant ergonomic
problems in welders were found to be awkward postures, manual material handling
and back bending and twisting. Furthermore, the results suggested that QEC can
present reliable findings in evaluating the risk level of exposure to WMSDs.
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