Hasani, Muhamad Hazizi MuhamadAbdullah, Victor Hoe Chee WaiAghamohammadi, NasrinChinna, Karuthan...
7页
查看更多>>摘要：Active ergonomic training and workstation adjustments have the potential to decrease the risk of work-related upper limb musculoskeletal disorders (WRULD) among computer users. Therefore, this study assessed the effectiveness of active ergonomic training and workstation adjustments in reducing the upper limb musculoskeletal pain and discomfort among two hundred administrative workers from eight randomly selected faculties or institutes of the University of Malaya. A two-arm cluster randomized controlled trial was implemented. The intervention group received active ergonomic training which comprises several intervention packages, whereas the control group was provided with a basic occupational health talk. The duration of the study was twelve months and data collection was performed at baseline, 6-month, and 12-month points, respectively. Data were analyzed using the repeated measures ANOVA and Generalized Estimating Equations analysis. The results showed that there was an increased odds for participants in the control group to be diagnosed with WRULD at the twelfth month compared to those in the intervention group (OR: 2.05; 95% CI: 1.05, 3.97). In addition, the intervention group had a larger reduction of pain as compared to the control group where the mean difference (95% CI) of pain score was 0.71 (0.30, 1.12) for the neck, 0.49 (0.06, 0.92) for the shoulder, 0.11 (-0.15, 0.37) for the elbow as well as 0.69 (0.28, 1.09) for the hand and wrist. This study demonstrated that active ergonomic training intervention could reduce the upper limb musculoskeletal pain and discomfort among the administrative workers. The findings suggested that active ergonomic training could be one of the effective, inexpensive and reasonably easy intervention programmes that can be implemented in the office settings of universities to inculcate good computer ergonomic habits and practices.
查看更多>>摘要：Introduction: Different physical and personal items can influence the occurrence of musculoskeletal disorders. The available tools don't use all of them in assessing the risk. Therefore, this study was aimed to develop a personal risk assessment of musculoskeletal disorders (PRAMUD) tool among the workers and evaluate its validation. Materials and methods: This cross-sectional study was conducted on 300 male employees in a steel factory. The information related to personal items was collected by interviewing the participants. The data of the physical items were gathered by observing their duties and conversing with them. Also, they were asked to fill out the Persian version of Cornell musculoskeletal discomfort questionnaires (CMDQ). The effect coefficients computed by structural equation modeling (SEM) were applied to develop the PRAMUD equation. Then, the final score was classified by receiver operating characteristic (ROC), and the PRAMUD method was validated via linear regression analysis.Results: Personal and physical items, with total coefficients of 0.377 and 0.546, could significantly affect the musculoskeletal symptoms, respectively. The calculated coefficients of the items were used to develop the PRAMUD equation. The final score of the method was categorized into four levels by optimal cut-off points of 12.22, 15.21, and 20.86. The PRAMUD tool could justify 76 and 70 percent of the variations of musculoskeletal symptoms in internal and external validity, respectively.Conclusion: Personal and physical parameters play important roles in predicting musculoskeletal disorders. The method developed by them could provide a more accurate forecast of the risk levels of these disorders.
查看更多>>摘要：The study investigated the whole-body vibration (WBV) levels that people riding in the vehicle are exposed to while passing through the manhole covers subsidence of passenger cars. In this context, vibration measurements were made with a passenger car at different speeds on two separate road sections with a bump with a known geometry in the middle. With the help of these data obtained, a vehicle dynamic model was calibrated, and vehicle responses were digitized. WBVs were dynamically simulated at 2.5, 5.0, 7.5, and 10 cm manhole depths at one-to-one and five-to-one transition slopes on before and after manhole passes. The simulated vibrations were produced by increasing ten units at speeds between 10 and 50 km/h in these criteria and evaluated the effects of ride speed on WBV. Within the scope of the study, vertical vibration data were characterized and evaluated with the help of frequency weighted root-mean-square acceleration (aw), vibration dose value (VDV), and equivalent static compressive stress (Se) parameters defined in ISO 2631. The analysis found that many passes through the manhole at ride speeds of 40 km/h and above at depths of 7.5 cm and above, potential health risk occurs in the human body.
Oestergaard, Anne SkovSmidt, Trine FernandoSogaard, KarenSandal, Louise Fleng...
14页
查看更多>>摘要：Offshore wind service technicians (WTs) inspect, maintain, operate and repair wind turbines, and are frequently exposed to ladder climbing, manual handling activities and work in awkward postures, all known risk factors for musculoskeletal disorders. Our primary aim was to assess the prevalence, severity and impact of musculoskeletal disorders among WTs and their perceived physical work demands, specifically related to the turbine size serviced (work site). We collected data using a cross-sectional survey including WTs (n = 176) from Denmark and the United Kingdom. Musculoskeletal disorders were assessed using the Nordic Musculoskeletal Questionnaire and physical demands were reported with duration considered in response categories and turbine size (Small, Medium, Large) defined by reported work site. Descriptive statistics, analyses of variance and logistic regression analyses were used to calculate the odds of experiencing poor health and performance outcomes between turbine sizes. Our results showed that the population was young (37 & PLUSMN; 8 years), male-dominated (99% males) and with low seniority (81% with less than 10 years) in the wind industry. WTs servicing larger sized turbines were less likely to experience musculoskeletal disorders (OR 0.15 [95% CI: 0.04 to 0.58]) and generally reported lower physical work demands compared with small turbines. Overall, we found a high prevalence (68%) and severity (median of 5 (0-10 NRS)) of musculoskeletal disorders across body parts and turbine sizes. The overall high but turbine size-specific prevalence of musculoskeletal disorders and physical work demands may inform decisions on required levels of health promotion and suitable preventive strategies in the offshore wind industry going forward.
Larson, Robert E.Johnson, A. WayneBruening, DustinRidge, Sarah T....
5页
查看更多>>摘要：Introduction: Healthcare workers are required to engage in repetitive actions when handling patients which leads to widespread low back pain in this population. Many variables are related to low back pain including repetitive motions and abnormal multifidus size and activation. This research sought to observe the relationship between low back pain and three variables in healthcare workers specifically: peak low back force when boosting a patient, multifidus cross-sectional area, and multifidus activation. Materials and methods: This cross-sectional, correlational study included 35 healthcare workers who currently work in inpatient hospital, acute hospital, or skilled nursing settings, and engage in patient handling as part of their job. Force and motion data were collected with motion capture and in-ground force plates and processed to estimate low back forces. Multifidus cross-sectional area was measured with ultrasound while activation was measured using surface electromyography. Results: There was not a significant difference in peak low back force between pain and nonpain groups. There was a significant difference in multifidus cross-sectional area at 2 of the 3 levels measured (L5 and S1). Lastly, there was not a significant difference in multifidus activation. Conclusions: Peak low back force during patient handling and lumbar multifidus activation do not seem to be a factor in pain in healthcare workers. Multifidus cross-sectional area is correlated with pain in this population indicating smaller multifidus may increase the likelihood of experiencing pain. Further work should be done to confirm this finding and offer potential solutions. Relevance to industry: Discovering factors in and ways to alleviate low back pain in healthcare workers is essential to the longevity of these professionals in their respective careers.
查看更多>>摘要：The effectiveness of wait indicator design is heavily influenced by users' underlying perceptions. The purpose of this study was to explore users' visual imagery and speed perceptions of wait indicators on a mobile application interface, and to propose a new research model that might be effective when considering the evaluation of other interface design projects. The multiple research methods used in this study include multidimensional scaling, factor analysis, the general linear model, and fuzzy logic theory. The results showed that there were significant differences in users' evaluations of visual imagery for different wait indicators. The triangulation fuzzy results divided the wait indicators into three groups, and found that they were designed in a form consistent with the users' visual imagery evaluation. Besides, some evaluations might make users perceive the wait to be short, such as the visual imagery of "vivid and unique." When users perceived that wait indicators were quick, their positive imagery evaluation was also high. Therefore, interface designers need to consider the substitutability of wait indicator design. These results can be used as a practical design guide in perceptual research to help interface designers efficiently design wait indicators that match users' potential feelings.
NSTL
Elsevier