Work-related musculoskeletal disorders in urban bus drivers of Hong Kong

Work-related neck pain and its association with postural and ergonomic factors among Pakistani professional drivers

BACKGROUND

Professional drivers are most likely to experience work-related neck pain due to awkward sitting positions for extended periods of time. Globally, millions of people depend on drivers who dedicate their lives to the craft. However, there is a paucity of data available on professional drivers suffering from neck pain or other musculoskeletal pain in Pakistan.

OBJECTIVE

To investigate the prevalence of neck pain and its association with postural and ergonomic factors among Pakistani professional drivers.

METHODS

This was a cross-sectional study conducted from January to June 2022 among 369 professional drivers located in Faisalabad, Pakistan. The data were collected by using a questionnaire comprising different sections, including personal, postural and ergonomic factors among drivers. The Statistical Package for the Social Sciences (SPSS) 25 was used for data entry and analysis.

RESULTS

The mean age of the participants was 40.83±9.27 years. Among the 369 participants, 129 reported neck pain. The period and point prevalence of neck pain were 35% (n = 129) and 31% (n = 115), respectively. Professional drivers reported a significant association between habitual forward posture and head-neck posture (p = 0.000) and between habitual forward posture and trunk posture (p = 0.000) with neck pain. In addition, ergonomics training (p = 0.002), ergonomics awareness (p = 0.002), and mobile use while driving (p = 0.000) were significantly associated with neck pain.

CONCLUSION

This study revealed that drivers have greater period prevalence of neck pain than point prevalence. Moreover, this study revealed that age, BMI, lifestyle, health status, medication use, and smoking habits were associated with neck pain in drivers. Drivers who had ergonomic training and awareness were significantly less likely to suffer from lower neck pain. Drivers with a habitual forward posture are more likely to suffer from neck pain than are drivers with a prone posture.

Health risk assessment and prevalence of work-related musculoskeletal disorders among the aged brick molders, in India

The Brickfield Industry is the major and oldest informal industry in India, where millions of brickfield workers make their livelihood. Aged brickfield workers are also involved in different activities in the brickfield, especially in brick mold activities owing to poor socioeconomic conditions. A cross-sectional study was designed to determine the prevalence of work-related musculoskeletal disorders among the aged brick molders and compare them with aged control subjects. A Nordic Questionnaire was applied to assess the discomfort felt among both groups of workers and the Rapid Upper Limb Assessment (RULA) method was used to evaluate posture during their job. The RULA posture analysis showed that the posture adopted by aged brick molders required changes immediately. The result of the ART tool also stated that the brick molding activities' exposure level was high and required further investigation urgently. The study concluded that due to working in a forward bending posture for a prolonged period, aged brickmolders suffered from severe low back and knee pain along with upper-limb disorders due to repetitive activities.

Prevalence of low back pain in professional drivers: a meta-analysis

OBJECTIVE

This meta-review aimed to investigate the prevalence of low back pain (LBP) in professional drivers.

STUDY DESIGN

This study is a meta-analysis.

METHODS

PubMed, Scopus, Embase, and Web of Science were searched for cross-sectional studies on the prevalence of LBP in professional drivers up to August 2023. The Agency for Healthcare Research and Quality was utilized for cross-sectional analytical studies. Statistical analysis of the included outcome indicators was conducted using Stata 16.0. The prevalence of LBP among professional drivers was measured using the random effects model, and heterogeneity was evaluated utilizing subgroup analysis. This meta-analysis review was registered with PROSPERO on April 28, 2023, under the registration number CRD42023422205.

RESULTS

In total, 1, 558 results met the inclusion and exclusion criteria, and 53 studies were included. The meta-analysis results indicated that professional drivers had a LBP prevalence of 35.0%, 95%CI (0.266, 0.433) for one week, 33.80%, 95%CI (0.233, 0.443) for one month, and 55.30%, 95%CI (0.503,0.603) for one year. In the global population of professional drivers, the prevalence of LBP was 56.0%, 95%CI (0.472, 0.648) and 54.5%, 95%CI (0.488, 0.602) without and with a history and high risk of LBP, respectively.

CONCLUSIONS

LBP remains prevalent among international drivers and has multiple contributing factors, highlighting the urgent need for increased awareness and prevention strategies.

Self-Reported Work-Related Musculoskeletal Problems and Associated Risk Factors Among Three-Wheel Car Drivers in Ethiopia: A Cross-Sectional Community-Based Study

Background

Globally, the demand for mobility is increasing. Three-wheel cars are one of the best options for meeting this demand and creating new job opportunities in most developing countries, including Ethiopia. Drivers are highly susceptible to developing musculoskeletal disorders (MSDs). Even though several studies on other groups of drivers have been conducted, little is done in Ethiopia among three-wheel car drivers.

Objective

This study investigated the prevalence of MSDs and identified their associated risk factors among three-wheel car drivers in Ethiopia.

Methods

A community-based cross-sectional research was conducted among drivers of three-wheel cars from August 05 to October 07, 2022. A stratified sampling followed by a simple random sampling technique was used to select 422 respondents. Structured and pretested questionnaires adapted from the Nordic Musculoskeletal Questionnaire were used to collect the data. Epi-data version 4.2.0.0 and SPSS version 20 were used to enter and analyze the collected data, respectively.

Results

In the previous 12 months, 62.45% of three-wheel car drivers had musculoskeletal disorders in any body region (95% CI: 58.36, 66.14). The back pain was the most frequently reported site of pain in this study. This study showed that the habit of doing physical exercise, work experience, site of service, taking rest breaks while driving, and having comfortable sitting posture was risk factor for musculoskeletal pain.

Conclusion

In this study, the overall 12-month prevalence of musculoskeletal problems among three-wheel car drivers was high. Periodic health checkups for drivers, lifestyle changes, delivering training, and creating awareness are important to address this high-burden occupation-related problem.

Prevalence of work-related musculoskeletal disorders (WRMSDs) and its association with modifiable risk factors in metropolitan bus transit drivers: A cross-sectional comparison

Background

Bus drivers are one of the top three occupations with the highest prevalence of work-related musculoskeletal disorders (WRMSDs). The present study aimed to determine the pattern and prevalence of WRMSD among metropolitan bus transit drivers, whose job profiles differ from traditional long-distance bus drivers, and to explore the effect of modifiable lifestyle-related risk factors.

Materials and Methods

In this cross-sectional study, consenting 254 metropolitan transit bus drivers (with at least five years of job duration) and 73 age-matched indoor desk job workers (administration staff of the same department) as a comparison group enrolled. Sociodemographic and occupational profile were collected on a semi-closed questionnaire. A modified Nordic questionnaire was used to determine musculoskeletal problems. Anthropometric measurement and haematocrit estimation were performed with standard techniques. All statistical analyses including logistic regression were performed with SPSS 26.0.

Results

The prevalence of WRMSDs among bus drivers was twice higher than administration staff (49.2% v/s 28.8%). Drivers experienced significantly higher pain for the lower back (36.6% v/s 11%), knee (29.5% v/s 15.1%), and hip (7.5% v/s 1.4%) in comparison with administration staff. Study reported age, tobacco usage, body mass index (BMI) and job profile of drivers (compared to administration staff) as significant predictors of WRMSDs.

Conclusion

WRMSDs were significantly higher among metropolitan bus transit drivers in comparison with administrative staff. Furthermore, WRMSDs are strongly associated with tobacco use and BMI. These modifiable risk factors may be the targets for preventive strategies to reduce the burden of WRMSDs among bus drivers.

Causal Relationship Between the Risk Factors and Work-Related Musculoskeletal Disorders Among Professional Drivers: A Systematic Review

OBJECTIVE

This review evaluates the evidence on the strength of causal relationship between categories of risk factors (RFs) and work-related musculoskeletal disorders (WRMSDs) among professional drivers.

BACKGROUND

A compilation of evidence on the causal relationship between RFs and WRMSDs among professional drivers is lacking.

METHODS

A systematic search of the literature was conducted in major electronic data bases that include Medline (1946 + via OvidSP), Embase (1974 + OvidSP), CINAHL (1982+), AMED, and Web of Science. The methodological quality of the studies was assessed and scored. A descriptive analysis on the categories of RFs associated with WRMSDs was conducted. The Bradford-Hill causation criteria and evidence interpretation tool were used to evaluate the causal relationship between RFs and WRMSDs in professional drivers.

RESULTS

Among the 54 studies reviewed, a strong evidence suggests a causal relationship between RFs such as whole-body vibration, awkward postures, lifting tasks, manual material handling, job stress, job demand, and previous pain episodes with WRMSDs. Moderate evidence was observed on RFs such as uncomfortable seat and low job satisfaction. The evidence on causal relationship between RFs such as years of professional driving, driving duration, and individual characteristics such as age and body mass index was inconclusive.

CONCLUSION

There is strong to moderate evidence on the causal relationship between the physical and psychosocial RFs and WRMSDs among professional drivers.

APPLICATION

Potential application of this review highlights evidence to occupational health practitioners, policy makers, and stakeholders on the strength of causal relationship between RFs and WRMSDs among professional drivers.

Prevalence of work-related musculoskeletal disorders among professional rickshaw drivers in Aligarh, Uttar Pradesh, India

BACKGROUND

Professional rickshaw driving is a seemingly sedentary occupation and involves many risk factors for work-related musculoskeletal disorders (WMSD).

OBJECTIVE

To assess the prevalence of work-related musculoskeletal disorders and its associated risk factors among professional rickshaw drivers.

METHODS

263 rickshaw drivers were voluntarily recruited from Aligarh, Uttar Pradesh, India. MSD symptoms in the past 12 months and last 7 days were assessed using a self-modified musculoskeletal questionnaire (Nordic Questionnaire). Chi-square tests and binary logistic regression were performed to analyze associations of MSD symptoms between study variables.

RESULTS

155 (58.9%) study participants reported MSD symptoms in past 12 months, in lower back (n = 126, 81.3%), leg (n = 122, 78.7%), neck (n = 106, 68.4%) and knee (n = 105, 67.7%); and 121 (46.1%) in last 7 days, in leg (n = 107, 88.4%), lower back (n = 102, 84.3%), neck (n = 89, 73.6%), upper back and knees (n = 87, 71.9%). Binary logistic regression showed relationship between working hours, seat and road condition, average load per ride, rickshaw ride duration, and standing driving with MSD symptoms among rickshaw drivers, especially in the lower back, leg/calf muscles, neck and knees.

CONCLUSION

The results showed a high prevalence of MSD among all rickshaw drivers, with the neck, lower back, leg/calf muscles and knees being the most affected body parts. In order to avoid adverse effects on the occupational health of rickshaw drivers, ergonomic intervention training is necessary.

Prevalence of musculoskeletal disorders among taxi drivers in Yaoundé, Cameroon: preventive effect of physical activity

Background

Musculoskeletal Disorders (MSDs) are very common conditions in the workplace. Among professional drivers, there would be an increased risk of developing these disorders. Identifying the associated factors would allow us to better devise effective prevention strategies. Our objective was to determine the prevalence of MSDs among taxi drivers in the city of Yaoundé and to search for associated factors, mainly the level of physical activity.

Methods

We conducted an analytical cross-sectional study of 151 adult male professional taxi drivers. We used a non-probabilistic consecutive and non-exhaustive sampling method. Sociodemographic, anthropometric and occupational data were collected. MSDs over the past 12 months were assessed using the Nordic Questionnaire and physical activity level was determined by the World Health Organization (WHO) Global Physical Activity Questionnaire (GPAQ). Univariate logistic regression models, followed by a multivariate logistic regression, were used to determine factors associated with the presence of MSDs.

Results

The overall prevalence of MSDs was 86.8% (95% CI 80.8 – 91.4); the most affected areas were mainly the lower back (72.8%) the neck (42.4%), and the knees (29.1%). Job dissatisfaction was associated with MSDs (OR = 2.1 95%CI = 1.1–3.9). Most taxi drivers (62.9%) had a low physical activity level and no association was found between the physical activity level and MSDs.

Conclusions

MSDs are common ailments among taxi drivers in Yaoundé (Cameroon). There is a need to think about how to address job dissatisfaction and better identify other associated factors in order to define good prevention strategies.

Prediction of Work-Related Risk Factors among Bus Drivers Using Machine Learning

A recent development in ergonomics research is using machine learning techniques for risk assessment and injury prevention. Bus drivers are more likely than other workers to suffer musculoskeletal diseases because of the nature of their jobs and their working conditions (WMSDs). The basic idea of this study is to forecast important work-related risk variables linked to WMSDs in bus drivers using machine learning approaches. A total of 400 full-time male bus drivers from the east and west zone depots of Bengaluru Metropolitan Transport Corporation (BMTC), which is based in Bengaluru, south India, took part in this study. In total, 92.5% of participants responded to the questionnaire. The Modified Nordic Musculoskeletal Questionnaire was used to gather data on symptoms of WMSD during the past 12 months (MNMQ). Machine learning techniques including decision tree, random forest, and naïve Bayes were used to forecast the important risk factors related to WMSDs. It was discovered that WMSDs and work-related characteristics were statistically significant. In total, 66.75% of subjects reported having WMSDs. Various classifiers were used to derive the simulation results for the frequency of pain in the musculoskeletal systems throughout the last 12 months with the important risk variables. With 100% accuracy, decision tree and random forest algorithms produce the same results. Naïve Bayes yields 93.28% accuracy. In this study, through a questionnaire survey and data analysis, several health and work-related risk factors were identified among the bus drivers. Risk factors such as involvement in physical activities, frequent posture change, exposure to vibration, egress ingress, on-duty breaks, and seat adaptability issues have the highest influence on the frequency of pain due to WMSDs among bus drivers. From this study, it is recommended that drivers get involved in physical activities, adopt a healthy lifestyle, and maintain proper posture while driving. For any transport organization/company, it is recommended to design driver cabins ergonomically to mitigate the WMSDs among bus drivers.

Self-Reported Musculoskeletal Disorder Symptoms among Bus Drivers in the Taipei Metropolitan Area

Bus driving is considered a highly stressful and unhealthy occupation, even among sedentary jobs, because of the particular task characteristics. This study used the Nordic Musculoskeletal Questionnaire (NMQ) to interview bus drivers and determine the risk factors for musculoskeletal discomfort. The NMQ was distributed to 152 bus drivers in the Taipei metropolitan area (Taiwan) and the valid data of 145 respondents were analyzed. The survey revealed that the overall prevalence of musculoskeletal disorder symptoms in any body part during the preceding year was 78.3%, and the body parts for which with the prevalence of discomfort was highest were the neck (46.9%), right shoulder (40.0%), lower back (37.2%), and left shoulder (33.8%). Stress and an uncomfortable seat may contribute to neck, shoulder, and lower back discomfort. Stretching between trips may help to reduce neck and shoulder discomfort. When comparing our results with those of similar studies, we discovered that the prevalence of symptoms and detailed risk factors vary by country and region. On this basis, we believe that local investigations emphasizing specific task arrangements and characteristics are needed to address the problem of musculoskeletal disorders in bus drivers.

Musculoskeletal Disorders Associated with Occupational Driving: A Systematic Review Spanning 2006–2021

Several occupations require workers to spend long periods of time driving road vehicles. This occupational task is associated with musculoskeletal disorders. The purpose of this review was to collate, synthesize, and analyze research reporting on musculoskeletal disorders associated with occupational driving, in order to develop a volume of evidence to inform occupational disorder mitigation strategies. A systematic search of academic databases (PubMed, EBSCO host, CINAHL, SPORTDiscus, and Web of Science) was performed using key search terms. Eligible studies were critically appraised using the Joanna Briggs Institute critical appraisal checklists. A Cohen’s kappa analysis was used to determine interrater agreement between appraisers. Of the 18,254 identified studies, 25 studies were selected and appraised. The mean critical appraisal score is 69% (range 38–100%), with a fair level of agreement (k = 0.332). The studies report that musculoskeletal disorders, most commonly lower back pain, is of concern in this population, particularly in truck, bus, and taxi drivers. Risk factors for these occupations include long hours in a sitting position, years in the profession, vehicle ergonomics, and vibration.

Ergonomic Design of Apron Bus with Consideration for Passengers with Mobility Constraints

Passengers in an apron bus are usually subjected to a standing position because of its limited seats and capacity. Due to this, passengers, especially those with mobility constraints, may expose themselves to musculoskeletal disorder (MSD) risks such as body pain, discomfort, and non-collision injuries. The purpose of this study is to design an ergonomic apron bus to aid the musculoskeletal discomfort experienced by passengers with mobility constraints, specifically the elderly, pregnant women, mothers carrying infants, and persons needing wheelchair assistance. A total of 149 participants are involved in the study. Corlett’s and Bishop’s body discomfort questionnaires and Rapid Entire Body Assessment (REBA) are utilized to evaluate the respondent’s experience of discomfort in different regions of their body. The results show that passengers with mobility constraints experience body discomfort during the apron bus ride. The prevalence of body discomfort is evident in the lower back, knee, thigh, arm, shoulder, and middle back. Finally, principles of anthropometry are used in the study along with quality function deployment (QFD), failure mode and effects analysis (FMEA), and cost-benefit analysis to evaluate the feasibility of the recommended ergonomic design of the apron bus. To meet the requirements of people with disabilities, the ergonomic design of an apron bus is created to minimize the risk of exposure of passengers to certain musculoskeletal discomfort, maximize the space, minimize the delay time of the airlines, and be able to prioritize passengers who require mobility assistance.

A Scoping Review on the Epidemiology of Chronic Low Back Pain among Adults in Sub-Saharan Africa

BACKGROUND

The global burden of chronic low back pain (CLBP) is a major concern in public health. Several CLBP epidemiological studies have been conducted in high-income-countries (HICs) with little known in low-and-middle-income-countries (LMICs) due to other competing priorities of communicable diseases. The extrapolation of results of studies from HICs for use in LMICs is difficult due to differences in social norms, healthcare systems, and legislations, yet there is urgent need to address this growing burden. It is against this backdrop that we conducted this review to map the current evidence on the distribution of CLBP in Sub-Saharan Africa (SSA).

METHODS

A comprehensive literature search was conducted from the following databases: PubMed, Google Scholar, Science Direct databases, World Health Organizations library databases, EMBASE, EBSCOhost by searching the following databases within the platform; academic search complete, CINAHL with full text, health sources: nursing/academic and MEDLINE. The title, abstract and the full text screening phases were performed by two independent reviewers with the third reviewer employed to adjudicate discrepancies. The reference list of all included articles was also searched for eligible articles. This scoping review was reported in accordance with the PRISMA extension for scoping reviews (PRISMA-ScR): checklist and explanation, as well as guided by Arksey and O'Malley's scoping review framework. A thematic content analysis was used to give a narrative account of the review.

RESULTS

The electronic search strategy retrieved 21,189 articles. Title/abstract and full text screening only identified 11 articles, which were included in this review. The prevalence of CLBP among the general population ranged from 18.1% to 28.2% and from 22.2% to 59.1% among LBP patients. The prevalence of occupation based CLBP ranged from 30.1% to 55.5%. Identified risk factors for CLBP are multifactorial and included biomechanical, psychological, socioeconomic and lifestyle factors, with psychosocial factors playing a significant role. Hypertension, diabetes mellitus, peptic ulcer disease were the most common comorbidities identified. CLBP disability was significantly associated with psychosocial factors. The management of CLBP in primary care follows the traditional biomedical paradigm and primarily involves pain medication and inconsistent with guidelines.

CONCLUSIONS

There are limited epidemiological data on CLBP in SSA, however, this study concluded that the prevalence and risk factors of CLBP in SSA are comparable to reports in HICs. Considering the projected increase in the burden of CLBP in LMICs extensive research effort is needed to close this knowledge gap.

Challenges and Perspectives for Research on Work Ability in Professional Drivers: A Scoping Review

To review studies on work ability (WA) and its relationship with the biopsychosocial factors of professional drivers. We performed a scoping review of articles published until 2021, extracting location, study design, sample characteristics, transport category, WA assessment methods, and health-related factors. Eighteen studies were found in different transport categories around the world. Most of the studies were cross-sectional (15/18, 83%), in a single branch of professional drivers, and the Work Ability Index (WAI) appears as the most common assessment instrument (7/18, 39%). The characteristics of work organization, lack of physical activity, comorbidities, and psychosocial and ergonomic factors are associated with musculoskeletal symptoms and stress in professional drivers. Comparisons of WA and related factors between studies and professional drivers are limited due to the multiplicity of assessment methods.

Association between Whole-Body Vibration exposure and musculoskeletal disorders among dumper operators: A case-control study in Indian iron ore mines

BACKGROUND

Dumper operators in mines worldwide are subjected to Musculoskeletal Disorders (MSDs) due to whole-body vibration exposure. This study evaluated the working-life-Whole-Body Vibration (WBV)-exposure and their association with various MSDs among dumper operators in mines which remains poorly addressed.

METHODS

This case-control study in Indian iron ore mines was conducted to compare randomly selected 65 dumper operators and 65 office workers. Data were collected through face-to-face interviews using the Nordic Musculoskeletal Questionnaire (NMQ) and were analysed using logistic regression models.

RESULTS

The study revealed that majority of the dumper operators were exposed to WBV exceeding the ISO-2631 limits. Compared with controls, the dumper operators had a much higher risk of upper back pain (age-overweight-adjusted odds ratio ORao = 5.37, 95%CI = 1.78-16.20), lower back pain (ORao = 2.72, 95%CI = 1.25-5.94), knee and leg pain (ORao = 3.68, 95%CI = 1.22-11.11), and having 2+ MSDs (ORao = 5.05, 95%CI = 1.88-13.51, vs. no MSDs). Working-life-WBV-exposure was higher among dumper operators having upper back pain (mean (SD) = 7.1 (1.91) vs. 5.7 (1.91), p <  0.01) and lower back pain (mean (SD) = 6.63 (2.10) vs. 5.55 (1.71), p <  0.01) compared to those without these MSDs. Older age was associated with higher risk of MSD pains.

CONCLUSION

Dumper operators have excess MSDs due to high working-life-WBV-exposure. Their MSDs and working-life-WBV-exposure should be regularly evaluated and reduced.

Musculoskeletal pain and sedentary behaviour in occupational and non-occupational settings: a systematic review with meta-analysis

BACKGROUND

Sedentary behaviour (SB; time spent sitting) is associated with musculoskeletal pain (MSP) conditions; however, no prior systematic review has examined these associations according to SB domains. We synthesised evidence on occupational and non-occupational SB and MSP conditions.

METHODS

Guided by a PRISMA protocol, eight databases (MEDLINE, CINAHL, PsycINFO, Web of Science, Scopus, Cochrane Library, SPORTDiscus, and AMED) and three grey literature sources (Google Scholar, WorldChat, and Trove) were searched (January 1, 2000, to March 17, 2021) for original quantitative studies of adults ≥ 18 years. Clinical-condition studies were excluded. Studies' risk of bias was assessed using the QualSyst checklist. For meta-analyses, random effect inverse-variance pooled effect size was estimated; otherwise, best-evidence synthesis was used for narrative review.

RESULTS

Of 178 potentially-eligible studies, 79 were included [24 general population; 55 occupational (incuding15 experimental/intervention)]; 56 studies were of high quality, with scores > 0.75. Data for 26 were meta-synthesised. For cross-sectional studies of non-occupational SB, meta-analysis showed full-day SB to be associated with low back pain [LBP - OR = 1.19(1.03 - 1.38)]. Narrative synthesis found full-day SB associations with knee pain, arthritis, and general MSP, but the evidence was insufficient on associations with neck/shoulder pain, hip pain, and upper extremities pain. Evidence of prospective associations of full-day SB with MSP conditions was insufficient. Also, there was insufficient evidence on both cross-sectional and prospective associations between leisure-time SB and MSP conditions. For occupational SB, cross-sectional studies meta-analysed indicated associations of self-reported workplace sitting with LBP [OR = 1.47(1.12 - 1.92)] and neck/shoulder pain [OR = 1.73(1.46 - 2.03)], but not with extremities pain [OR = 1.17(0.65 - 2.11)]. Best-evidence synthesis identified inconsistent findings on cross-sectional association and a probable negative prospective association of device-measured workplace sitting with LBP-intensity in tradespeople. There was cross-sectional evidence on the association of computer time with neck/shoulder pain, but insufficient evidence for LBP and general MSP. Experimental/intervention evidence indicated reduced LBP, neck/shoulder pain, and general MSP with reducing workplace sitting.

CONCLUSIONS

We found cross-sectional associations of occupational and non-occupational SB with MSP conditions, with occupational SB associations being occupation dependent, however, reverse causality bias cannot be ruled out. While prospective evidence was inconclusive, reducing workplace sitting was associated with reduced MSP conditions. Future studies should emphasise prospective analyses and examining potential interactions with chronic diseases.

PROTOCOL REGISTRATION

PROSPERO ID # CRD42020166412 (Amended to limit the scope).

Ergonomic assessment of work-related musculoskeletal disorder and its determinants among commercial mini bus drivers and driver assistants (mini bus conductors) in Nigeria

Introduction

Work-related musculoskeletal disorder (WMSD) is a leading causes of occupational injury and disability among drivers and workers in the transport industry. This study evaluated the ergonomically assessed WMSD and its determinants among Nigerian commercial mini bus drivers (BD) and mini bus conductors (BC)

Method

A total of 379 participants (BD = 200, BC = 179) were purposively sampled for this exploratory cross-sectional study. Participants’ WMSD and work related variables were respectively assessed using the standardized Nordic questionnaire and a content-validated, Driving Work Station Assessment (DWSA) form. Data were analyzed descriptively and inferentially using chi-square and logistic regression. The level of significance was set at α = 0.05.

Results

The participants were aged between 20 and 66 years, with a mean age of 33.26±10.76years (BD = 38.42±10.22years, BC = 27.50±8.13years); most of whom consumed alcohol (84.4%) and experienced severe job stress (73.4%). There was a high prevalence (95.8%; BD = 94.5%, BC = 97.8%) of WMSDs, the lower back (66.8%) and upper back (54.1%) had the highest regional prevalence of WMSD. The BC (BC vs BD) had significantly (p<0.05) higher prevalence of Neck (47.7% vs 21.5%) and upper back (80.4% vs 30.5%) WMSDs. Conversely, the BD (BD vs BC) had significantly (p<0.05) higher prevalence of low-back (85.0% vs 46.4%), knee (25.0% vs 9.5%), elbow (11.5% vs 3.9%), and wrist (10.5% vs 3.4%) WMSD. There was a significant association between WMSD and each of work duration (X² = 11.634, p = 0.009), work frequency (X² = 8.394, p = 0.039), job dissatisfaction (X2 = 10.620, p = 0.001) and job stress (X² = 16.879, p = 0.001). Working beyond 4days/week (OR = 10.019, p = 0.001), job dissatisfaction (OR = 1.990, p = 0.031), constrained working postures (OR = 5.324, p = 0.003) and fatigue (OR = 4.719, p = 0.002) were the predictors of WMSD.

Conclusion

Job stress, work duration and work frequency, posture and fatigue are important determinants of WMSDs among mini bus drivers and their assistants in Nigeria. Ergonomics training intervention for this population is recommended.

Physical work conditions and disparities in later life functioning: Potential pathways

Research in the US on the social determinants of reduced physical functioning at older ages has typically not considered physical work conditions as contributors to disparities. We briefly describe a model of occupational stratification and segregation, review and synthesize the occupational health literature, and outline the physiological pathways through which physical work exposures may be tied to long-term declines in physical functioning. The literature suggests that posture, force, vibration, and repetition are the primary occupational risk factors implicated in the development of musculoskeletal disorders, through either acute injuries or longer-term wear and tear. Personal risk factors and environmental and structural work characteristics can modify this association. In the long-term, these musculoskeletal disorders can become chronic and ultimately lead to functional limitations and disabilities that interfere with one's quality of life and ability to remain independent. We then use data on occupational characteristics from the Occupational Information Network (O*NET) linked to the 2019 American Community Survey (ACS) to examine disparities among sociodemographic groups in exposure to these risk factors. Occupations with high levels of these physical demands are not limited to those traditionally thought of as manual or blue-collar jobs and include many positions in the service sector. We document a steep education gradient with less educated workers experiencing far greater physical demands at work than more educated workers. There are pronounced racial and ethnic differences in these exposures with Hispanic, Black, and Native American workers experiencing higher risks than White and Asian workers. Occupations with high exposures to these physical risk factors provide lower compensation and are less likely to provide employer-sponsored health insurance, making it more difficult for workers to address injuries or conditions that arise from their jobs. In sum, we argue that physical work exposures are likely an important pathway through which disparities in physical functioning arise.

Osteomuscular symptoms on motorcycles in the city of Rio Branco, Acre, Brazil, West Amazon

ABSTRACT

Musculoskeletal disorders gradually affect workers in different parts of the world, compromising their occupational health and quality of life. Professionals exposed to these symptoms include the motorcycle taxi driver, whose pain is due to the overuse of the musculoskeletal system and little time to recover it.To identify the prevalence of musculoskeletal symptoms in motorcycle taxi drivers in the city of Rio Branco, Acre, Brazil, West Amazon.Cross-sectional study, involving 296 motorcycle taxi drivers in the city of Rio Branco-Acre, Brazil, male, from December 2016 to February 2017. The Nordic Musculoskeletal Questionnaire was used to collect information related to symptoms (pain, discomfort, or numbness) in the last 7 days of work. For the exclusion criteria were, being female; not reside outside the city of Rio Branco, Acre; having less than 3 months of work activity; not be carrying out their work activities at the time of application of the protocol; be limited by clinical or physical issues at the time of application of the protocol. The data obtained in the questionnaire were entered into the Epidata program (Epidata Association, Odense, Denmark) and then transferred to the STATA 10 statistical program (Stata Corp., College Station), for categorization and statistical analysis.The study population is over 36 years old; most reported having a partner and a higher education level. The average daily working hours of the participants were 12 hours, with the majority working over 12 hours daily. Most of the epidemiological variables factors were associated with musculoskeletal pain when the prevalence and prevalence ratio analyzes were performed. Higher prevalence of musculoskeletal symptoms in the lumbar region is with 17.9%. In the lower limbs, the most affected joint was the ankle (5.7%), followed by the hip (5.07%) and knee (5.07%), respectively. Insomnia was present in 55.35% and self-reported headache in 49.4% of participants.The musculoskeletal disorders generated by the daily service of motorcycle taxi drivers are directly affecting the quality of life of these professionals.

Prevalence of musculoskeletal pain and associated disability among professional bus drivers: a cross-sectional study

Purpose

Professional bus drivers risk developing musculoskeletal pain (MSP) and disability due to their working condition. The current study investigates the prevalence rate of MSP and disability among professional bus drivers.

Methods

A cross-sectional study was conducted among 83 professional bus drivers. The prevalence rate of MSP was evaluated using a standardized Nordic musculoskeletal questionnaire. The disabilities due to the MSP were evaluated using neck disability index (NDI), Oswestry disability index (ODI) and shoulder pain and disability index (SPADI) tools. Prevalence of MSP was presented with 95% of confidence interval (CI) at an alpha level of 0.05. The 12 months and 7 days prevalence of MSP were tabulated for analysing the trend of MSP between the upper and lower body regions.

Results

The drivers had a mean driving experience of 10.07 ± 7.26 years. The mean driving hours/week were 50.25 ± 12.82 h. Neck and back were the most affected regions with a prevalence rate of 81.9% (N = 68) and 80.7% (N = 67) at 12 months. Back region recorded the highest 7 days prevalence rate for MSP with 53% (N = 44). Approximately one fourth of the bus drivers population (23.9%, N = 16) had moderate disability in back region. More than half with MSP in the neck region presented mild disability (54.4%, N = 37).

Conclusion

The bus drivers reported a high prevalence rate of MSP in the neck, back and shoulder regions with mild to moderate disabilities. Appropriate health care and rehabilitation programs are necessary for the prevention and management of MSP among the bus drivers.

Health problems among Swedish ambulance personnel: long-term risks compared to other professions in Sweden - a longitudinal register study

Objectives. This study aimed to investigate whether Swedish ambulance personnel differ in the extent of suffering from health problems compared to other occupational groups. Methods. Two cohorts of ambulance personnel from 2001 and 2008, with 1778 and 2753 individuals, respectively, were followed regarding assignment of diagnostic coding (International Classification of Diseases codes) until 2016. These two cohorts represent all who were employed as ambulance personnel by public employers during these years. Two comparison groups were added: other healthcare workers and other professions. All data were retrieved from national registers. The χ² test was were used for statistical calculation. Results. Swedish ambulance personnel are at a significantly higher risk of being affected by 'Paroxysmal tachycardia, atrial fibrillation and flutter, other cardiac arrhythmias', by 'Other intervertebral disc disorders' and by 'Arthropathies', when compared to both comparison groups in both cohorts. Almost similar results were seen for 'Gonarthrosis' and for 'Dorsopathies'. Conclusions. Swedish ambulance personnel run the risk of being affected by certain diseases and injuries to a greater extent compared to other professions.

Prevalence of work related musculoskeletal disorders among occupational bus drivers of Karnataka, South India

BACKGROUND

Work-related health problems result in an economic loss of 4-6% in GDP (Gross domestic Product) of the most countries. In the industrialized countries, 1/3rd of the health-related absence to duty are due to musculoskeletal disorders. Professional driving is one such occupation which looks like sedentary occupation, but involves many risk factors that contribute to work-related musculoskeletal disorders (WMSD) due to its nature of working and work environment. This research describes the various risk factors associated with WMSDs and their effects on drivers health.

OBJECTIVE

To assess the prevalence of WMSD and its associated risk factors among the bus drivers of Karnataka State Road Transport Corporation (KSRTC), Karnataka.

METHODS

Subjects considered in this study are 301 full-time bus drivers from the central division KSRTC which consists of 6 depots in Bengaluru. Information regarding reported WMSD symptoms during immediate past 7 days to 12 months, the intervention of WMSD in their day-to-day life and the overall comfort of the body are determined through Standardized Nordic Questionnaire and also by direct observation. The survey questionnaire is conducted by face to face interview.

FINDINGS

From the statistical analysis, it is found that around 55.8% of the study population has experienced WMSD. The prevalence of WMSD is most common in the age group of 29-39 years (53.5%) followed by the age group of >40 years.

CONCLUSION

In this study, some of the work-related and lifestyle/health-related factors show significant association with WMSD in bus drivers of Karnataka. Musculoskeletal disorders can be prevented by designing the driver's workspace ergonomically so that the design suits to all sorts of drivers and the drivers should also be trained on basics of vehicle ergonomics (posture, seat adjustments, in-vehicle controls adjustments).

INTERPRETATION

KSRTC should educate drivers on the basics of vehicle ergonomics, harmful use of tobacco/alcohol, unhealthy food habits and also to involve in physical exercise at least 75-150 mins weekly. If not, the trend of drivers suffering from WMSD belonging to mid-age will increase exponentially.

SCOPE FOR FUTURE WORK

Statistical result and direct observation insist on undertaking further studies on ergonomic interventions at driver's cabin, lifestyle/occupational health factors which mitigate WMSD in different parts of the body during driving.

Association of Exposures to Seated Postures With Immediate Increases in Back Pain: A Systematic Review of Studies With Objectively Measured Sitting Time

OBJECTIVE

The purpose of this study was to conduct a systematic review of studies to determine whether sitting time measured objectively (by laboratory controlled time trial, direct observation, or wearable sensor) is associated with the immediate increase in low back pain (LBP) (determined by pain scale rating) in people >18 years of age.

METHODS

Four databases (PubMed, EMBASE, SPORTDiscus, and Cumulative Index to Nursing and Allied Health Literature) were searched from inception to September 1, 2018. Randomized controlled trials and cohort and cross-sectional studies, where objectively measured sitting time was temporally matched with a measure of LBP in adults, were included. Studies without a control session conducted on a separate day were excluded. Screening, full-text review, data extraction, and risk of bias assessment (Quality In Prognosis Studies) of included papers were performed independently by 2 reviewers, with a third available to resolve disagreements.

RESULTS

In total, 609 articles were identified, 361 titles/abstracts were screened,75 full-text articles were assessed for eligibility, and 10 met the inclusion criteria. All but 1 reported sitting time to be associated with an immediate increase in LBP. Six of these reported clinically relevant pain levels (n = 330). Half of the included studies were rated as having a low risk of bias and the remaining were rated as having a moderate risk of bias.

CONCLUSION

Prolonged sitting increases immediate reporting of LBP in adults; however, no conclusion between sitting and clinical episodes of LBP can be made. Based upon these findings, we recommend that future prospective studies should match objectively measured sitting with temporally related pain measurements to determine whether prolonged sitting can trigger a clinical episode of LBP.

Prevalence of musculoskeletal pain among professional drivers: A systematic review

OBJECTIVES

Professional drivers are at high risk of developing musculoskeletal pain (MSP) due to risk factors such as prolonged sitting, whole body vibration, awkward posture, and repetitive actions. This review investigates the reported prevalence of MSP among professional drivers.

METHODS

An electronic search of Medline (1946 + via OvidSP), Embase (1974 + OvidSP), CINAHL (1982+), AMED, PubMed, and Web of Science from 1990 to July 2019 was performed. Methodological quality of studies was assessed using three quality assessment tools for cross-sectional, case-control, and prospective cohort studies. The prevalence of MSP was reported using descriptive analysis.

RESULTS

A total of 56 studies conducted in 23 different countries across a total of 14 types of occupational transport were reviewed. Data of a total pooled population of 18 882 professional drivers were analyzed for MSP. The prevalence of MSP ranged between 43.1% and 93%. The low back was the most frequently reported body region for MSP with a meta-prevalence rate of 53% (N = 9998). Neck, shoulder, and upper back were the other common regions with high prevalence.

CONCLUSION

There is a high prevalence of MSP in professional drivers and low back was the most frequently reported body region, followed by neck, upper back, shoulder, knee, hip/thigh, wrist, ankle, and elbow. MSP is complicated in nature and therefore in-depth exploration of causal relationships between MSP and risk factors is necessary so that appropriate healthcare programs can be initiated to prevent and treat MSP effectively.

Musculoskeletal Symptoms Among Surgeons at a Tertiary Care Center: a Survey Based Study

Introduction:

Musculoskeletal (MSK) manifestations represent a common work-related physical complication that affect surgeons and impacts their life and the healthcare service negatively.

Aim:

The aim of this study was to determine the prevalence of work related MSK manifestations among surgeons in a tertiary care hospital and to identify the possible associated risk factors.

Methods:

A Web-based self-administered cross-sectional survey was conducted. This study targeted all surgeons regardless of their nationalities, ages, genders, and marital statuses. The questionnaire assessed the participants’ demographic data as well as musculoskeletal manifestations.

Results:

Most respondents (80%) suffered from MSK manifestations that were related to performing surgeries. Back and neck areas represented the most affected body parts (71.1% and 59.8%, respectively). A significantly higher percentage of those with musculoskeletal manifestations practiced for 5-10 years (28.9%) (p = 0.006).

Conclusion:

MSK pain is common among Saudi surgeons in different specialties. More attention should be directed to improving the physical environments in which the surgeons are operating. Moreover, surgeons should be educated about the recommended ergonomic positions that can prevent or decrease their work related MSK manifestations.

Effects of Ergomotor Intervention on Improving Occupational Health in Workers with Work-Related Neck-Shoulder Pain

(1) Background: Work-related neck and shoulder pain (WRNSP) are common problems, and past occupational research has focused on ergonomic interventions such as adjusting workstations while physiotherapists have traditionally focused on teaching exercises to improve posture and movement control in the clinical setting. The current study aimed to integrate these two approaches and evaluate the immediate and long-term effects of such interventions on occupational exposure outcomes. (2) Methods: A total of 101 patients diagnosed with WRNSP were randomized into 2 groups: Control (CO) group (n = 50) and ergomotor (EM) group (n = 51). Participants in the control group had 12 weeks of usual care (conventional physiotherapy) while participants in the EM group received an integrated program with tailor-made motor control training and ergonomic advice for 12 weeks. (3) Results: Both groups achieved significant improvement in pain and functional outcomes at post-intervention. The EM group also reported significantly improved scores in terms of perceived exertion in the job-related physical demands (JRPD) and the short form workstyle questionnaires compared to the control group. (4) Conclusions: The results suggest that ergomotor intervention may be more effective in producing favorable occupational health outcomes compared to conventional physiotherapy.

Effectiveness of Educational Physical Activity Intervention for Preventive of Musculoskeletal Disorders in Bus Drivers

Background

Driving is a challenging job. Drivers always face the high risk of musculoskeletal disorders (MSDs). Educational interventions could be effective in preventing and controlling these disorders. The present study aims to assess the effectiveness of an educational physical activity intervention in preventing MSDs among bus drivers in Isfahan, Iran.

Methods

This quasi-experimental study was conducted on 60 urban bus drivers, who were selected using multistage sampling. They were evaluated at two time points, namely before and three months after the intervention. The intervention was conducted in three 90-minute sessions. The HBM-based educational content was delivered through lectures, PowerPoint presentations, videos, practical demonstrations of corrective exercises, and educational pamphlets. Data were analysed using the SPSS program, version 20, the paired t-test, and the independent t-test.

Results

Before the intervention, there was no significant difference between the two groups with respect to the mean scores of the HBM constructs. However, later on, the mean scores of perceived susceptibility, perceived severity, perceived benefits, perceived barriers, self-efficacy, and behaviour increased significantly in the intervention group, compared with those in the control group. (P < 0.001).

Conclusions

The results showed that the physical activity as an HBM-based educational intervention had a positive effect on the prevention of MSDs in urban bus drivers.

Work stress and health problems of professional drivers: a hazardous formula for their safety outcomes

Background

Several empirical studies have shown that professional drivers are a vulnerable occupational group, usually exposed to environmental stressors and adverse work conditions. Furthermore, recent studies have associated work-related stress with negative job performances and adverse health outcomes within this occupational group, including cardiovascular diseases and unsafe vehicle operation.

Objective

The aim of this study was to describe the working conditions and the health status of this occupational group, and to evaluate the association between the Demand-Control model of job stress and their self-reported health and safety outcomes.

Methods

A pooled sample of 3,665 Colombian professional drivers was drawn from five different studies. The Job Content Questionnaire and the General Health Questionnaire were used to measure work stress and self-reported mental health, respectively. Additionally, professional drivers self-reported health problems (hypertension, dyslipidemia, diabetes and overweight) and health-related risky behaviors (smoking and sedentary behavior).

Results

Regarding the Job Demands-Control (JDC) model, it was found that approximately a third part of Colombian professional drivers suffer from high job strain (29.1%). Correlational and multivariate analyses suggest that de JDC model of stress is associated with the professional drivers' mental health, traffic accidents and fines, but not with other physical and behavioral health-related outcomes, which are highly prevalent among this occupational group, such as hypertension, dyslipidemia, diabetes, overweight, smoking and sedentary behavior.

Conclusion

The results of this study suggest that (a) stressful working conditions are associated with health and lifestyle-related outcomes among professional drivers, and (b) that evidence-based interventions are needed in order to reduce hazardous working conditions, job stress rates and their negative impact on the health of this occupational group.

[Musculoskeletal pain among bus drivers and fare collectors in the Metropolitan Region of Belo Horizonte, Brazil]

Musculoskeletal pain among professionals in the transport sector has been linked to working conditions. The scope of this study was to assess the prevalence of cervical musculoskeletal pain and its relation to pain in other areas (arms, hands and shoulders). The association between neck pain, related to pain in other areas or otherwise, was checked against occupational factors. A cross-sectional, descriptive and analytical study was conducted with 799 bus drivers and 708 fare collectors of the Metropolitan Region of Belo Horizonte, Brazil. The outcome was characterized according to the positive answer to the question about musculoskeletal pain in the anatomical areas studied. The prevalence of neck pain in the sample was highest at 16.3%, followed by pain in the shoulders 15.4%, arms 13.3% and hands 6.3%. The factors associated with musculoskeletal pain in the sample were being female, complaints of disability, perception of threat to safety, vibration, excessive or unbearable noise and sitting in an uncomfortable posture. The results provide clues to transformation of the workplace, thereby contributing to the enhancement of occupational health.

The effects of spinal support device on pain and extensibility of the hamstrings in patients with non-specific low back pain

[Purpose] The objective of this study was to investigate the effects of spinal support device (SSD) on pain and hamstring extensibility in patients with non-specific low back pain (NSLBP). [Subjects and Methods] 20 patients with NSLBP were recruited and randomly assigned to either the SSD group or the control group. In the SSD group, SSD was applied; in the control group, bed rest in supine position was performed. Both groups underwent treatment 20 min/day, 3 times a week, for a duration of 4 weeks. To assess the hamstring extensibility, sit and reach test (SRT) was performed. To assess pain pressure threshold (PPT) of the sacroiliac joint, a pressure algometer was used. Visual analog scale (VAS) was used to quantify pain. [Results] The SSD group showed a significant improvement in sacroiliac joint pain with increased VAS, and the control group showed a significantly increased VAS after intervention. In the SSD group, VAS was significantly increased, but SRT was not changed compared with the control group. [Conclusion] These results demonstrated that an application of SSD effectively attenuates low back pain. Therefore, SSD may be a suitable intervention for pain control in patients with NSLBP.

Computer-based estimation of the hip joint reaction force and hip flexion angle in three different sitting configurations

Sitting is part of our daily work and leisure activities and can be performed in different configurations. To date, the impact of different sitting configurations on hip joint loading has not been studied. We therefore evaluated the hip joint reaction force (HJRF) and hip flexion angle in a virtual representative male Caucasian population by means of musculoskeletal modelling of three distinct sitting configurations: a simple chair, a car seat and a kneeling chair configuration. The observed median HJRF in relation to body weight and hip flexion angle, respectively, was 22.3% body weight (%BW) and 63° for the simple chair, 22.5%BW and 79° for the car seat and 8.7%BW and 50° for the kneeling chair. Even though the absolute values of HJRF are low compared to the forces generated during dynamic activities, a relative reduction of over 50% in HJRF was observed in the kneeling chair configuration. Second, the hip flexion angles were both in the kneeling chair (-29°) and simple chair configuration (-16°) lower compared to the car seat and, as such, did not reach the threshold value for femoroacetabular conflict. In conclusion, the kneeling chair appears to hold the greatest potential as an ergonomic sitting configuration for the hip joint.

Effect of occupational health nursing practice on musculoskeletal pains among hospital nursing staff in South Korea

OBJECTIVE

The purpose of this study was to identify whether occupational health nursing variables serve as the contributing factors to musculoskeletal pains (MSP).

METHODS

A self-administered questionnaire composed of demographic characteristics, the practice of occupational health nursing and information regarding MSP was designed based on in-depth interviews with eight nurses. This study included 226 hospital nursing staff who worked at three university hospitals located in Seoul, South Korea. Statistical analysis was performed by using SPSS and AMOS 19.0.

RESULTS

Shoulder and neck pains occurred when subjects worked more than 46 h/week. Subjects who performed 'work-time adjustment' had lesser chance of having shoulder, leg/foot and wrist/finger pains. Overtime work hours showed an indirect effect on multiple sites of MSP by mediator variable, which was 'work-time adjustment'. Organized night duty days eventually decreased multiple sites of MSP.

CONCLUSION

Administration strategies for nurses to adjust work-time within 46 h/week should be considered.

A socioecological framework for research on work and obesity in diverse urban transit operators based on gender, race, and ethnicity

Urban transit (bus and rail) operators, totaling nearly 700,000 persons, are one of the heaviest occupational groups in the United States (US). Little is known about occupational risk factors for weight gain and obesity and their interrelationship with health-related behaviors, particularly among female minority (African Americans and Hispanics) transit operators who are at greater risk for obesity. As a step towards developing successful obesity interventions among urban transit operators, this paper aims to present a new socioecological framework for studying working conditions, chronic strain, health-related behaviors, weight gain/obesity, and obesity disparity in diverse urban transit operators based on gender, race, and ethnicity. Our framework is a synthesis of several different theories and disciplines: the resource-work load model (work stress), occupational ergonomics, the theory of intersectionality, and worksite health promotion. The framework was developed utilizing an extensive literature review, results from our on-going research on obesity, input from focus groups conducted with Los Angeles transit operators as well as interviews and meetings with transit operator stakeholders (management, unions, and worksite transit wellness program), and ride-along observations. Our hypotheses highlighted in the framework (see Fig. 1) are that adverse working conditions, largely characterized as a combination of high demands and low resources, will increase the risk for weight gain/obesity among transit operators directly through chronic strain and hypothalamic dysfunction (hyper-and hypo-activations), and indirectly through health-related behaviors and injuries/chronic severe pain. We also hypothesize that the observed increase in adiposity among female minority operators is due to their greater exposure to adverse occupational and non-occupational conditions that reflect their intersecting social identities of lower social class and being a minority woman in the US. Our proposed framework could greatly facilitate future transit worksite obesity studies by clarifying the complex and important roles of adverse working conditions in the etiology of weight gain/obesity and obesity disparity among transit operators and other working populations.

Reliability and Validity of Different Models of TKK Hand Dynamometers

OBJECTIVE. We examined the reliability and validity of the analog and digital models of TKK handgrip dynamometers using calibrated known weights.

METHOD. A total of 6 dynamometers (3 digital and 3 analog; 2 new and 1 old for each model) were used in this study.

RESULTS. Intrainstrument reliability was very high; systematic error for test–retest reliability was ≤|0.3 kg|. The systematic error among different instruments (same model) and between different models (digital vs. analog) ranged between |0.4 kg| and |0.6 kg|. The systematic error between new and old dynamometers ranged from |0.8 kg| to |1 kg|. All dynamometers provided lower values for the same known weights than a SECA scale, with a systematic error ranging from −0.94 to −2.64 kg.

CONCLUSION. This study indicates that clinicians and investigators who provide treatment to address handgrip strength should use the same instrument and model for repeated measures. Distinguishing meaningful change from dynamometer variability is discussed.

Musculoskeletal problems and quality of life of elementary school teachers

PURPOSE

To investigate prevalence and anatomical distribution of musculoskeletal pain (MSP) and its impact on quality of life (QoL) in elementary school teachers working in Muğla town center.

METHODS

Physical, sociodemographic and occupational characteristics of 104 teachers were recorded. Onset, prevalence and consequences of MSP (Extended Nordic Musculoskeletal Questionnaire) and QoL (Short Form-36 Health Survey) of teachers with (n = 37) and without (n = 67) MSP during the last 12 months were compared.

RESULTS

The prevalence of MSP was 77% for the lifelong period and 36% for the last 12 months. Physical and sociodemographic characteristics, daily employment period and length of standing and sitting were similar between groups (p > 0.05). The most common painful regions were the neck (39%) and the lower back (38%). MSP of these regions was the common reason for seeking healthcare, prevention from activities and taking sick leave. MSP had negative impact, especially on the physical components of QoL (p < 0.05).

CONCLUSIONS

The results reveal high prevalence of MSP among teachers, as well as its negative impacts on QoL. Especially neck and lower back seem to be the most frequently affected regions of the body. These findings draw attention toward the need for developing strategies to prevent MSP among teachers.

Occupational risk factors for low back pain among drivers of three-wheelers in Sri Lanka

BACKGROUND

Approximately 5% of all households in Sri Lanka operate a three-wheeler as their primary source of income. However, very little is known about the occupational health risks associated with driving these vehicles.

OBJECTIVES

The aim of this study was to assess occupational risk factors, including the number of hours worked associated with the 4-week prevalence of low back pain (LBP) among drivers of three-wheelers.

METHODS

Questionnaires were administered to 200 full-time drivers of three-wheelers from the Galle District in Sri Lanka. Occupational, psychological, socio-demographic, lifestyle, and anthropometric variables were collected. Univariate and multivariate analysis were used to investigate the correlation between occupational risk factors of the prevalence of LBP.

RESULTS

15·5% of respondents reported experiencing LBP in the previous 4 months. Univariate analysis revealed that the number of hours worked per week, feeling pressure to compete with other drivers, and perceived stress scale scores were significantly associated with the 4-week prevalence of LBP. Multivariate analysis found that the number of hours worked per week and engine type were significantly associated with LBP.

CONCLUSIONS

LBP is common among drivers of three-wheelers in Sri Lanka. Long work hours and two-stroke engines were significantly associated with LBP. Results from this study point towards a role for educational, behavioral health, and policy interventions to help prevent and reduce LBP among these drivers.

Prevalence and Risk Factors for Low Back Pain Among Professional Drivers in Kano, Nigeria

This study investigated the prevalence, risk factors, and impact of low back pain (LBP) among professional drivers in Nigeria. Two hundred male drivers aged 19-64 years were recruited in the study. Data regarding prevalence, individual risk factors, and impact of LBP were obtained. The prevalence rate of LBP was 73.5%, and LBP have affected the driving performance of up to 74% drivers. After adjustment for age, LBP prevalence was associated with driving for >15 hours/day (odds ratio [OR]; 95% confidence interval [CI]): (0.04; 0.01, 0.20), driving car (5.52; 1.55, 19.64), and driving bus (10.49; 2.63, 41.82). No association was found between LBP prevalence and years spent driving. The study found that high prevalence of LBP affected the performance of a substantial percentage of the participants.

Chinese translation and cross cultural adaptation of the workstyle short form

INTRODUCTION

Workstyle as it is related to symptoms of musculoskeletal symptoms of the upper limbs is the behavioural, cognitive and physical responses that occur in individuals to increases in work demands. A self report measure of this construct was developed that was both associated with and predictive of work related upper extremity symptoms. The aim of this study was to translate, culturally adapt, and validate a Chinese version of the Workstyle Short Form (C-WSF).

METHODS

The C-WSF was translated following a forward and backward translation approach. Content validity was examined by item- and scale-level content validity indices. The intra-class correlation coefficient (ICC) was used to analyze test-retest reliability. Exploratory factor analysis was used to identify factor structures and the internal consistency of these factors was assessed by calculating Cronbach's alpha reliability coefficients. The construct validity of the C-WSF was first determined by convergence in relation to the Cumulative Symptoms Score for Upper Extremity symptoms and then by comparison of those with and without upper extremity pain in Chinese cooks, a work with a high level of exposures to varying levels of work demands coupled with exposure to workplace psychosocial and biomechanical stressors.

RESULTS

The C-WSF demonstrated excellent item- and scale-level content validity index (>0.9). The factor structure of C-WSF was similar to its original English version. The internal consistency of different subscales of C-WSF ranged from 0.65 to 0.91. The ICC was between 0.79 and 0.93 indicating good test-retest reliability. C-WSF was significantly correlated with upper extremity symptoms (r = 0.34, p < 0.001).

CONCLUSIONS

C-WSF is a reliable and valid version of the Workstyle measures for use in Chinese population.

Musculoskeletal injuries in auto racing: a retrospective study of 137 drivers

BACKGROUND AND PURPOSE

The effect of continuous exposure of a driver's bones and muscles to vibration and G forces to years of automobile racing and the effect on overall health have not yet been examined in detail. The goal of this study was to investigate via questionnaire the musculoskeletal injuries and influencing parameters in 130 amateur and 7 professional race car drivers.

MATERIALS AND METHODS

A questionnaire, translated in English and German, was used to investigate the parameters that influence the racing performance and the character of resulting injuries.

RESULTS

This investigation involved 137 drivers (133 men and 4 women) with a mean age of 42 years (standard deviation = 15). Approximately half of the drivers had < 10 years of experience in auto racing (49%). The drivers mainly complained about pains in the lumbar (n = 36; 26%), shoulder (n = 27; 20%), and neck regions (n = 25; 18%). The driver's posture and the comfort of the seat were statistically significant for causing lower back and upper legs pains. The race duration was relevant to neck and shoulder discomfort.

CONCLUSION

The high incidence of musculoskeletal injuries in race car driving indicates the need for further improvements. Elimination of driver complaints about pain in the spine and upper extremities can be achieved through technical development, as already accomplished in Formula One racing.

Predictors of Work-Related Musculoskeletal Disorders among Commercial Minibus Drivers in Accra Metropolis, Ghana

Background. The objective of this study is to determine the prevalence and predictors of work-related musculoskeletal disorders (WMSDs) among a sample of commercial minibus drivers in the Accra Metropolis of Ghana. Methods. The participating drivers (n=148) were recruited from various lorry terminals and assessed by using a semistructured questionnaire that included the Nordic Musculoskeletal Questionnaire (NMQ). Results. Of the 148 drivers, 116 (78.4%) reported having WMSDs during the previous 12 months. The prevalence of the various WMSD domains was low back pain (58.8%), neck pain (25%), upper back pain (22.3%), shoulder pain (18.2%), knee pain (14.9%), ankle pain (9.5%), wrist pain (7.4%), elbow pain (4.7%), and hip/thigh pain (2.7%). Multiple logistic regression analysis adjusted for possible confounders showed that less physical activity (OR = 4.9; 95% CI = 1.5–16.5; P=0.010), driving more than 12 hours per day (OR = 2.9; 95% CI = 1.1–7.8; P=0.037), and driving at least 5 days per week (OR = 3.7; 95% CI = 1.4–9.4; P=0.007) were significantly associated with WMSDs among this cohort of drivers. Conclusion. These modifiable factors may be targets for preventive strategies to reduce the incidence of WMSDs among occupational minibus drivers in Ghana.

Occupational and Personal Determinants of Musculoskeletal Disorders among Urban Taxi Drivers in Ghana

Background. There is a lack of epidemiological data on musculoskeletal disorders (MSDs) among occupational drivers in Ghana. The present study seeks to estimate the prevalence, body distribution, and occupational and personal determinants of MSDs in a sample of taxi drivers in the Accra Metropolis of Ghana. Methods. A total of 210 participants were enrolled in this cross-sectional study. All the participants were evaluated by using a semistructured questionnaire and the standardized Nordic Musculoskeletal Disorder Questionnaire. Results. The estimated prevalence of MSDs was 70.5%. The prevalence of the various MSD domains was as follows: lower back pain (34.3%), upper back pain (16.7%), neck pain (15.2%), shoulder pain (11.0%), knee pain (10.0%), hip/thigh pain (2.9%), elbow pain (4.8%), ankle/feet pain (2.4%), and wrist/hand pain (1.9%). Multiple logistic regression analysis of the data showed that participants who were employee drivers, drove taxi more than 12 hours per day or at least 5 days per week, perceived their job as stressful, and were dissatisfied with their job were at a greater risk of developing MSDs. Conclusions. These findings call for preventive strategies and safety guidelines in order to reduce the incidence of MSDs among urban taxi drivers in Ghana.

A prospective cohort study of neck and shoulder pain in professional drivers

In a three-year follow-up study, the occurrence of neck and shoulder pain (NSP) in terms of frequency, duration and intensity was investigated in a population of 537 male professional drivers. Over the follow-up period, the cumulative incidences for neck and shoulder pain were 31.9% and 21.4%, respectively. After adjustment for potential confounders, a measure of cumulative whole-body vibration exposure was significantly associated with all NSP outcomes. Lifting loads and work with hands above shoulder level were significantly related to shoulder outcomes, while driving with trunk bent or twisted was associated with neck pain. Limited job decision, low social support and job dissatisfaction were significant predictors of neck outcomes. Psychological distress was associated with all NSP outcomes. The findings of this cohort study suggest that NSP outcomes are of multifactorial origin in driving occupations.

PRACTITIONER SUMMARY

This prospective cohort study highlighted the multifactorial nature of neck and shoulder pain (NSP) outcomes in a population of professional drivers. Cumulative whole-body vibration exposure, physical load factors and adverse psychosocial environment at the workplace, as well as individual-related psychological distress, were significant predictors of the occurrence of NSP in the professional drivers.