Prevalence of Thumb and Wrist Pain Among Smartphone Users in the Saudi Arabian General Population: A Cross-Sectional Study.

Background This study aims to investigate the prevalence of thumb and wrist pain among smartphone users in the general population of Saudi Arabia, examining the potential links between the duration and frequency of smartphone usage, specific smartphone activities, and the occurrence of discomfort in the thumb and wrist. Methodology This descriptive cross-sectional study was conducted at Jazan University, Saudi Arabia, between July 2022 and June 2023. The questionnaire developed following an extensive literature review, covered demographic information, smartphone usage patterns, assessment of thumb or wrist pain, and evaluation of the impact of this discomfort. Descriptive statistical methods were employed, and relationships between thumb or wrist pain and demographic variables were analyzed using chi-square and Wilcoxon rank-sum tests. Results In total, 811 participants were included in this study. Approximately 322 (39.7%) study participants reported wrist or thumb pain. Notably, female sex (P = 0.001) and prolonged daily smartphone usage exceeding five hours (P = 0.045) were linked to thumb or wrist pain. Additionally, emailing on smartphones was linked to thumb or wrist pain (P = 0.04). Concerning smartphone ergonomics, the majority of respondents reported holding their phones with one hand (215, 66.77%), in a downward position (290, 90.06%), and with their wrists bent downward (136, 42.24%). Conclusions Our study highlights a relatively high prevalence of wrist and thumb pain among smartphone users in the general Saudi Arabian population. Furthermore, we identified a connection between prolonged smartphone use and wrist and thumb pain, with a more pronounced prevalence observed among females.

Factors affecting upper limb ergonomics in robotic colorectal surgery.

The aim of the study was to examine the factors which may influence suboptimal ergonomic surgeon hand positioning during robotic colorectal surgery (RCS). An observational study of 11 consecutive RCS cases from June 2022 to August 2022 was performed. Continuous video footage of RCS cases was analysed concurrently with video recordings of surgeon's hand positions at the console. The outcome studied was the frequency with which either hand remained in a suboptimal ergonomic position outside the predetermined double box outlines, as marked on the surgeon's video, for >1 min. Situations which resulted in poor upper limb ergonomics were dissection in the peripheral operating field location, left-hand use, use of the stapler, dissection of the main mesenteric blood vessels, and multi-quadrant surgery. Being aware of situations when suboptimal ergonomic positions occur can allow surgeons to consciously compensate by using the clutch or pausing to take a rest break. What does this paper add to the literature?: The study is important because it is the first to look at factors which may influence poor upper limb ergonomics during non-simulated RCS. By recognizing these factors and compensating for them, it may improve surgeon ergonomics with resultant better performance.

Ergonomists' experiences of executing occupational health surveillance for workers exposed to hand-intensive work: a qualitative exploration.

BACKGROUND: In order to reduce work-related upper limb disorders, the Swedish Work Environment Authority introduced an occupational health surveillance targeting hand-intensive work. A process model, aimed at supporting the employers as well as the occupational health service provider (i.e., ergonomist) in the work process with the occupational health surveillance, was developed. The objective of this qualitative study was to explore ergonomists' experiences of the execution of occupational health surveillance for hand-intensive work when following the novel process model as well as factors influencing the execution. METHODS: Semi-structured individual interviews were conducted with ten ergonomists on one occasion regarding their experience of following the work process. Qualitative content analysis with an inductive approach was used for analyzing the data. RESULTS: The ergonomists' experiences were summarized in one theme "A joint roadmap supporting a participatory process" and two categories "Clear structure provided by the components" and "The process influenced by collaboration and context". The ergonomists valued being guided by the systematics of the model, which provided structure and clarity in their work. Factors affecting the execution were related to communication deficiencies and uncertainties regarding expectations between different roles and functions (e.g., ergonomists and contact person, lack of information to workers). Additional factors, for instance, companies' routines and the ergonomist's intra-organizational support, such as access to IT-resources, could also affect the process. CONCLUSIONS: The findings reveal that this process model facilitates the ergonomists' work and cooperation with a client company. However, the process model needs to be developed and accompanied by a guideline with information related to the process, including e.g., description of a start-up meeting and of the roles/functions of the involved parties.

Prevalence of and prevention for work-related upper limb disorders among physical therapists: a systematic review.

BACKGROUND: Physical therapists (PTs) are at increased risk for development of work-related upper limb disorders (WRULDs) due to the physically intensive, constant hands-on nature of the profession. The objectives of this systematic review were to examine the literature on WRULDs among PTs, specifically the (1) 1-year prevalence, (2) workplace risk factors, (3) consequences, and (4) coping strategies utilized to mitigate WRULDs. METHODS: A comprehensive search of the literature was performed using PubMed, CINHAL, EMBASE, and Google Scholar. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines were used for conducting this systematic review. Studies that reported the 1-year prevalence of WRULDs among PTs, workplace risk factors for WRULDs, consequences of WRULDs, and coping strategies utilized by PTs were included. RESULTS: Twelve studies met the inclusion criteria. The 1-year WRULDs prevalence rates varied widely, with thumb disorders having the highest prevalence (7.6-52.5%), followed by wrist and hand disorders (5-66.2%), shoulder disorders (3.2-45.2%), and elbow disorders (4-16%). Reported risk factors included treating a high volume of patients and frequent performance of manual therapy techniques. Consequences included interference with PTs' personal and professional activities while coping strategies involved alterations to the work environment, techniques used, and workload. CONCLUSIONS: WRULDs remain a persistent threat to the PT workforce, likely due to the hands-on, physically intensive nature of professional activities. An essential strategy to reduce WRULDs is to improve clinicians' awareness of WRULDs, workplace risk factors, and subsequent consequences of WRULDs. Effective coping strategies are critical to preserve, protect, and prolong PTs' use of the upper limbs.

Reliability and validity of Simplified Chinese version of Quick Disabilities of the Arm, Shoulder, and Hand (QuickDASH) questionnaire: cross-cultural adaptation and validation.

OBJECTIVE: To translate and cross-culturally adapt Quick Disabilities of the Arm, Shoulder, and Hand (QuickDASH) Questionnaire into a Simplified Chinese version (QuickDASH-C), and evaluate the reliability and validity of the QuickDASH-C in patients with upper limb disorders. METHODS: Cross-cultural adaptation was performed according to the internationally recognized guidelines of American Academy of Orthopedic Surgeons Outcome Committee. A total of 150 participants were recruited in this study. Internal consistency was estimated using Cronbach's alpha. Intra-class correlation coefficient (ICC) was used to determine test-retest reliability. Construct validity was analyzed by evaluating the correlations between QuickDASH-C and Disabilities of the Arm, Shoulder, and Hand (DASH) questionnaire and visual analogue scale (VAS) as well as the short form (36) health survey (SF-36). RESULTS: The original version of the QuickDASH was well cross-culturally adapted and translated into Simplified Chinese. QuickDASH-C was indicated to have excellent reliability (Cronbach's alpha = 0.818, ICC = 0.907). QuickDASH-C correlated almost perfectly to DASH (r = 0.820, p < 0.001). Moderate to substantial correlations between QuickDASH-C and VAS (r = 0.463, p < 0.001), as well as physical function (r = - 0.630, p < 0.001), role physical (r = - 0.471, p < 0.001), bodily pain (r = - 0.563, p < 0.001) and general health (r = - 0.414, p < 0.001) subscales of SF-36, were observed. CONCLUSION: QuickDASH-C was demonstrated to have excellent acceptability, reliability, and validity in patients with upper limb disorders, which could be recommended for patients in mainland China. KEY POINTS: • This study translated and cross-culturally adapted Quick Disabilities of the Arm, Shoulder, and Hand (QuickDASH) questionnaire into a Simplified Chinese version. • The reliability and validity of Simplified Chinese version of QuickDASH were good in evaluating patients with upper limb disorders.

Evaluation of Motor-Assisted Gloves (SEM Glove) for Patients with Functional Finger Disorders: A Clinical Pilot Study.

The SEM Glove developed by Bioservo Technologies AB is a new device that increases grip and pinch force. The purpose of this study was to evaluate the effectiveness of the device on the grip and pinch strength of patients with functional disorders of the fingers. MATERIALS AND METHOD: 30 hospitalized patients with upper limb functional disorder were enrolled. The assistance of the device for the grip and pinch strength of each subject were assessed by the difference between the measured values with and without the SEM Glove. The 95% confidence interval of the difference was calculated across the subjects, and statistical significance was defined as when the lower limit was a positive value (corresponding with a paired t-test at a significance level of 0.05). The odds ratio was calculated in the study of subject adaptation, with statistical significance set using Fisher's exact test at a significance level of 0.05. RESULTS: Grip strength significantly decreased (worn-not worn difference (kg): mean = -3.7, CI95 (-5.4, -2.1)). Pinch strength (thumb - middle finger) significantly increased (worn-not worn difference (N): mean = -4.1, CI95 (1.6, 6.6)). Analysis of factors related to improvement in hand function when wearing the SEM Glove extracted manual muscle tests (MMTs) of the upper extremity 4 or higher. The odds ratio was 6.11. CONCLUSIONS: Use of the SEM Glove improved the pinch strength of patients with functional disorders of the hands.

The Impact of Physical and Ergonomic Hazards on Poultry Abattoir Processing Workers: A Review.

The poultry abattoir industry continues to grow and contribute significantly to the gross domestic product in many countries. The industry expects working shifts of eight to eleven hours, during which workers are exposed to occupational hazards which include physical hazards ranging from noise, vibration, exposure to cold and ergonomic stress from manual, repetitive tasks that require force. A PubMed, Medline and Science Direct online database search, using specific keywords was conducted and the results confirmed that physical and ergonomic hazards impact on abattoir processing workers health, with harm not only to workers' health but also as an economic burden due to the loss of their livelihoods and the need for treatment and compensation in the industry. This review endeavours to highlight the contribution poultry processing plays in the development of physical agents and ergonomic stress related occupational diseases in poultry abattoir processing workers. The impact includes noise-induced hearing loss, increased blood pressure, menstrual and work related upper limb disorders. These are summarised as a quick reference guide for poultry abattoir owners, abattoir workers, poultry associations, occupational hygienists and medical practitioners to assist in the safer management of occupational health in poultry abattoirs.

Accuracy and repeatability of an inertial measurement unit system for field-based occupational studies.

The accuracy and repeatability of an inertial measurement unit (IMU) system for directly measuring trunk angular displacement and upper arm elevation were evaluated over eight hours (i) in comparison to a gold standard, optical motion capture (OMC) system in a laboratory setting, and (ii) during a field-based assessment of dairy parlour work. Sample-to-sample root mean square differences between the IMU and OMC system ranged from 4.1° to 6.6° for the trunk and 7.2°-12.1° for the upper arm depending on the processing method. Estimates of mean angular displacement and angular displacement variation (difference between the 90th and 10th percentiles of angular displacement) were observed to change <4.5° on average in the laboratory and <1.5° on average in the field per eight hours of data collection. Results suggest the IMU system may serve as an acceptable instrument for directly measuring trunk and upper arm postures in field-based occupational exposure assessment studies with long sampling durations. Practitioner Summary: Few studies have evaluated inertial measurement unit (IMU) systems in the field or over long sampling durations. Results of this study indicate that the IMU system evaluated has reasonably good accuracy and repeatability for use in a field setting over a long sampling duration.

Assessment of functional parameters and comfort of a new computer mouse as compared with other types of input devices.

BACKGROUND: This study was conducted to assess functional parameters and comfort of a new computer mouse (Ergomice) as compared with three other input devices. MATERIALS AND METHODS: Functional parameters (i.e., task completion time and error rate) of each device were assessed by 10 participants using standardized software based on Standard No. ISO 9241-9:2000. Comfort evaluation was also undertaken for each device using the visual analogue scale technique. Statistical analysis including the Wilcoxon signed-rank test and the Friedman test was performed using SPSS version 16. RESULTS: The functional parameters of the standard mouse were better than those of the other devices. However, no significant difference was observed between this mouse and Ergomice. Overall comfort evaluation showed that the standard mouse and Ergomice were more comfortable to work with. The comfort level of hand/wrist posture in the Ergomice was higher than that of the other three devices. CONCLUSION: The design features of Ergomice could improve its functional properties. Hand/wrist posture comfort of Ergomice was judged to be high compared with that of the other devices.

Upper-extremity and neck disorders associated with keyboard and mouse use.

Musculoskeletal disorders are frequently related to computer use in the workplace. The aim of this chapter is to provide an overview of the evidence in the literature concerning the putative association between neck, shoulder, and upper-limb disorders and occupational exposure to use of a computer and its devices. We searched the scientific literature via PubMed, using specific search strategies, including substrings tailored to retrieve papers about: (1) occupational etiology; (2) computer use; and (3) different upper-limb disorders. We intended to include, in our evaluation, systematic reviews and relevant, informative papers published later on. We were able to retrieve 11 systematic reviews and 11 informative studies regarding neck, shoulder, and upper-limb disorders. There is limited/insufficient and/or inconsistent evidence indicating that computer work may be associated to neck, shoulder, or distal arm complaints. There is sufficient evidence indicating no association between carpal tunnel syndrome and computer work. There are no studies regarding the use of computers and some neck, shoulder, and upper-limb diseases, such as tennis elbow and trigger finger. Applying the general principles of ergonomics to computer work is probably the correct strategy to pursue, with the aim of maintaining office workers' well-being.

Clinical neurological examination vs electrophysiological studies: Reflections from experiences in occupational medicine.

Seventy-five percent of upper limb disorders that are related to work are regarded as diagnostically unclassifiable and therefore challenging to the clinician. Therefore it has been generally less successfully to prevent and treat these common and frequently disabling disorders. To reach a diagnosis requires the identification of the responsible pathology and the involved tissues and structures. Consequently, improved diagnostic approaches are needed. This editorial discusses the potentials of using the clinical neurologic examination in patients with upper limb complaints related to work. It is argued that a simple but systematic physical approach permits the examiner to frequently identify patterns of neurological findings that suggest nerve afflictions and their locations, and that electrophysiological studies are less likely to identify pathology. A diagnostic algorithm for the physical assessment is provided to assist the clinician. Failure to include representative neurological items in the physical examination may result in patients being misinterpreted, misdiagnosed and mistreated.

The Greek version of the Hand20 questionnaire: crosscultural translation, reliability and construct validity.

The English version of Hand20 questionnaire was translated into Greek and cultural adaptation was performed. The validity was assessed in 134 patients with a variety of upper limb disorders. A comparison of Hand20 and DASH was also performed. All patients completed EQ-5D, Hand20 and DASH questionnaire. Test-retest reliability was assessed in a subgroup of 37 patients. We assessed the convergent validity of Hand20 by correlating its scores to DASH and EQ-5D scores. We also compared the completeness of Hand20 and DASH. We found no statistically significant differences in Hand20 scores between the 1st and 2nd measurements as well as a strong correlation between Hand20 and the other two questionnaires. There were also better rates of response and fewer missing data even in elderly individuals.

Work-Related Upper Limb Disorders: A Case Report.

In this study the complex interrelationship between physical factors, job stress, lifestyle and genetic factors on symptoms of work-related musculoskeletal disorders of the upper limbs is demonstrated by a case report and discussion of the literature. A 58 year old woman with long lasting complaints of the upper limbs with increasing intensity and duration, generalisation, combined with skin thickness, Raynaud's phenomenon, joint disorders, arterial and pulmonary hypertension, metabolic lipid dysfunctions is presented. Occupational history proves continuous duration of service at a job with occupational physical static load with numerous repetitive monotonous systematic motions of fingers and hands as a weaver of Persian rugs followed by work at an automated loom and variable labour activities. Though the complaints dated since the time she was a manual weaver, the manifestations of generalized joint degenerative changes, system sclerosis with Raynaud's phenomenon with similar upper extremities signs and symptoms discount upper limbs musculoskeletal disorder as caused only or mainly by occupational risk factors. The main principles and criteria for occupational diagnosis of musculoskeletal upper limb disorders and legislative requirements for their reglamentation are discussed.

Validity of the modified RULA for computer workers and reliability of one observation compared to six.

Awkward body posture while typing is associated with musculoskeletal disorders (MSDs). Valid rapid assessment of computer workers' body posture is essential for the prevention of MSD among this large population. This study aimed to examine the validity of the modified rapid upper limb assessment (mRULA) which adjusted the rapid upper limb assessment (RULA) for computer workers. Moreover, this study examines whether one observation during a working day is sufficient or more observations are needed. A total of 29 right-handed computer workers were recruited. RULA and mRULA were conducted. The observations were then repeated six times at one-hour intervals. A significant moderate correlation (r = 0.6 and r = 0.7 for mouse and keyboard, respectively) was found between the assessments. No significant differences were found between one observation and six observations per working day. The mRULA was found to be valid for the assessment of computer workers, and one observation was sufficient to assess the work-related risk factor.

Prevalence of upper limb disorders among female librarians.

BACKGROUND: Work as a librarian involves exposure to potential risk factors for developing upper limb disorders. The prevalence of upper limb symptoms has, however, not previously been assessed in this occupational group. AIMS: To estimate the 7-day and annual prevalence of self-reported neck and upper limb symptoms in librarians and to examine associations with specific tasks and ergonomic risk factors. METHODS: A cross-sectional study using components of the standardized Nordic questionnaire. The study population consisted of librarians employed by a large local authority, and data collection was by means of a self-administered questionnaire. RESULTS: from studies on keyboard workers and on the general population were used as comparators. RESULTS: The 7-day prevalence of self-reported neck and upper limb pain in female librarians was 42% (95% confidence interval (CI) 33.7-50.5) and the annual prevalence was 65% (95% CI 56.6-72.8). The prevalence of reported wrist and hand pain increased with increased working involving a wide thumb-index span (P < 0.05) with a significant linear trend in prevalence with increasing exposure (P < 0.01). There was a strong association between reporting hand and/or wrist pain and awareness of work-related upper limb disorder (P < 0.05). CONCLUSIONS: The annual prevalence of self-reported upper limb symptoms among female librarians was high, but there was insufficient evidence to confirm whether the prevalence was higher than in the general population or among keyboard workers. Working with a wide thumb-index span was associated with reporting upper limb symptoms.

Musculoskeletal disorders among workers in plastic manufacturing plants / Distúrbios músculo-esqueléticos em trabalhadores da indústria de plásticos

Background: Epidemiological studies have indicated an association between musculoskeletal disorders (MSDs) and physical work demands. Psychosocial work demands have also been identified as possible risk factors, but findings have been inconsistent. Objectives: To evaluate factors associated with upper back, neck and upper limb MSD among workers from 14 plastic manufacturing companies located in the city of Salvador, Brazil. Methods: A cross-sectional study design was used to survey a stratified proportional random sample of 577 workers. Data were collected by questionnaire interviews. Factor analysis was carried out on 11 physical demands variables. Psychosocial work demands were measured by demand, control and social support questions. The role of socio-demographic factors, lifestyle and household tasks was also examined. Multiple logistic regression was used to identify factors related to upper back, neck and upper limb MSDs. Results: Results from multiple logistic regression showed that distal upper limb MSDs were related to manual handling, work repetitiveness, psychosocial demands, job dissatisfaction, and gender. Neck, shoulder or upper back MSDs were related to manual handling, work repetitiveness, psychosocial demands, job dissatisfaction, and physical unfitness. Conclusions: Reducing the prevalence of musculoskeletal disorders requires: improving the work environment, reducing biomechanical risk factors, and replanning work organization. Programs must also be aware of gender specificities related to MSDs.

Introdução: Estudos epidemiológicos têm indicado uma associação entre distúrbios músculo-esqueléticos (DME) e demandas físicas no trabalho. Demandas psicossociais no trabalho também têm sido identificadas como possíveis fatores de risco, mas os achados são inconsistentes. Objetivos: Avaliar fatores associados aos DME em região alta do dorso, pescoço e extremidades superiores entre trabalhadores de 14 fábricas de plástico na Região Metropolitana de Salvador, Brasil. Métodos: Estudo de corte transversal foi realizado para avaliar uma amostra aleatória estratificada proporcional de 577 trabalhadores, utilizando questionário administrado por entrevistador. Análises fatoriais foram realizadas com as 11 variáveis relacionadas a demandas físicas, resultando em dois fatores. Demandas psicossociais no trabalho foram medidas através de questões para demanda psicológica, controle e suporte social. A importância das variáveis sociodemográficas, de estilo de vida e trabalho doméstico também foi examinada. Regressão logística múltipla (RL) foi utilizada para identificar fatores relacionados com DME em região alta do dorso, pescoço e extremidades superiores. Resultados: Resultados da RL mostraram que DME em extremidades superiores distais estão relacionadas com manuseio de carga, repetitividade, demandas psicossociais, insatisfação no trabalho e ser do sexo feminino. DME na região alta do dorso e pescoço estão associados ao manuseio de carga, repetitividade, demandas psicossociais, insatisfação no trabalho e condicionamento físico precário. Conclusões: Reduzir a prevalência de DME requer medidas que reduzam as demandas físicas no trabalho e ao mesmo tempo promovam mudanças na organização do trabalho, visando a reduzir as demandas psicossociais. Os programas devem ser sensíveis a uma provável diferença de gênero na ocorrência de DME.

Prevalence and Risk Factors of Work Related Upper Limb Disorders (WRULD) Among Female Telephone Operators in a Telecommunication Centre in Kuala Lumpur

A study was carried out on 79 female telephone operators working in a Telecommunication Centre in Kuala Lumpur to determine the prevalence of Work Related Upper Limb Disorders (WRULD) and its risk factors. Data collection for this study was done between December 2000 and May 2001. The presence of WRULD was determined based on a guided questionnaire and physical examination. The response rate for this study was 94.9% (n= 75) and results showed that the prevalence of WRULD among the female telephone operators was 48.0%: Stage 1= 38.9%, Stage 2= 19.4%, Stage 3= 38.9%, Stage 4= 0% and Stage 5= 2.8%. In the telecommunication centre, it was found that those with WRULD had a mean of 11.59±9.09 years of employment duration whereas those without WRULD had a mean of 9.89 ± 8.48 years of employment duration. None of the factors studied such as Body Mass Index, age, ethnicity, menstrual cycle, hormone replacement therapy, overtime work, duration of employment in the present unit and in the telecommunication centre differ in distribution between subjects with and without WRULD. This could be contributed by factors such as small number of subjects or the common healthy worker effect found in occupational health research. The findings studied of this study show that almost 40.0% of the workers experienced pain and neurological symptoms. Since none of the factors was found to be associated with WRULD, an elaborate study with a case-control design is needed in order to match cases and enable researchers to control the effect of confounding factors. This will ensure risk factors pertinent to WRULD in the Malaysian setting to be identified.

Musculoskeletal Symptoms in Two Plants in the Electrical Sector.

The study consisted of describing, using a questionnaire, the musculoskeletal symptoms in two industries in the electrical sector. The questionnaire was distributed to more than 600 workers in the two industries. The questionnaire described four types of variables: usual population data (age, gender, experience, etc.), certain work variables, the regions of the body affected in the past 12 months and in the past 7 days, and the severity of the symptoms. Ten variables were used to provide a symptom severity index. In the two plants, the women reported more frequent and more serious problems than the men and the least experienced workers were the most affected. In Plant 1, the questionnaire pinpointed two work sectors, whereas in Plant 2, the problems were found not to be concentrated in a few sectors, but distributed among different jobs throughout the entire plant.