Do psychosocial factors mediate the appearance of musculoskeletal symptoms? Evidence of an empirical study about the role of mental workload in computer workers

Association of electronic learning devices and online learning properties with work-related musculoskeletal disorders (WMSDs): A cross-sectional study among Thai undergraduate students

Computers and mobile devices are becoming the primary instruments used by students worldwide in all facets of their working and learning activities. This study aimed to investigate the relationship between the use of electronic devices, the characteristics of learning properties, and the potential predictors of work-related musculoskeletal disorders (WMSDs) among Thai undergraduate students. In this cross-sectional study, data were collected using Microsoft Forms with an online self-administered scale. The research instrument comprised four categories: demographic and health history characteristics, online learning properties, psychological health, and perceived WMSDs. Using multistage sampling, 4,618 samples were collected from 18 schools nationwide. A total of 3,705 respondents were eligible for the analysis. Descriptive statistics, chi-square, and binary logistic regression analyses were used for the data analysis. The results showed that the majority of the respondents had online learning only in some semesters/subjects (67.3%), used mobile phones for learning (43.3%), had an appropriate desk workstation (66.1%), used non-office chairs (76.0%), spent prolonged periods sitting (91.6%), had a bent posture while sitting (78.2%), had a private working space/room (92.4%), had proper lighting (85.4%), and experienced normal levels of stress (81.1%). Overall, 42.1% of Thai university students experienced WMSDs in any area of the body in the prior 6 months. Six significant predictors (p = 0.05) of WMSDs were obtained from the multivariate analysis, including stress, use of electronic devices, bent posture, prolonged sitting, year of study, and online learning classes (The adjusted odds ratio ranged from 1.43 to 3.67). High-risk students who mostly used mobile learning devices should be prescribed interventions to reduce stress, develop postural awareness and skills, emphasize positioning solutions, and reduce extended sitting time. The results indicated that preventive measures are warranted and required because the risk predictors were identified as preventable.

Ward-level leadership quality and prospective low-back pain of eldercare workers: do resident handlings mediate the association?

OBJECTIVE

We investigated the extent to which ward-level leadership quality was associated with prospective low-back pain among eldercare workers, and how this association was mediated by observed resident handlings.

METHODS

530 Danish eldercare workers, employed in 121 wards, distributed across 20 nursing homes were evaluated. At baseline, leadership quality was measured using the Copenhagen Psychosocial Questionnaire, and resident handlings [handlings per shift, handlings not using assistive devices, handlings done alone, interruptions to handlings, impediments to handlings] were assessed using observations. Frequency and intensity of low-back pain was assessed monthly during the following year. All variables were averaged for each ward. We used ordinary least squares regressions to examine direct effects of leadership on low-back pain and indirect effects through handlings, using PROCESS-macro for SPSS.

RESULTS

After adjustments for low-back pain at baseline, type of ward, staff ratio (i.e., number of workers divided by number of residents) and proportion of devices not in place, leadership quality showed no effect on prospective low-back pain frequency (β = 0.01 [- 0.05:0.07]) and a small beneficial effect on pain intensity (β = - 0.02 [- 0.04:0.00]). Resident handlings did not mediate the association between leadership quality and frequency or intensity of low-back pain.

CONCLUSIONS

Good leadership quality was associated with a small decrease in prospective low-back pain intensity, but resident handlings did not seem to play a mediating role, although better ward-level leadership quality contributed to fewer workplace-observed resident handlings without assistance. Potentially, organizational factors, such as type of ward and staff ratio, may have a greater influence on handlings and low-back pain than leadership quality per se among eldercare workers.

Ergonomic and psychosocial risks related to musculoskeletal problems among Brazilian labor judges in telework during the COVID-19 pandemic

AbstractObjectives. The aim of this study was to evaluate the ergonomic and psychosocial risks in telework and their relationship with musculoskeletal problems in Brazilian labor judges during the COVID-19 pandemic. Methods. A cross-sectional study was conducted with 119 participants. The data were collected through a sociodemographic and occupational questionnaire, from the Brazilian versions of the Maastricht Upper Extremity Questionnaire (MUEQ-Br revised), the Rapid Office Strain Assessment (ROSA-Br) and the Nordic Musculoskeletal Questionnaire (NMQ), added to a numerical pain scale. Results. According to ROSA-Br, 47.06% of the participants showed an outcome where it is considered that there is a need for immediate intervention in the workplace. The results of ROSA-Br and MUEQ-Br revised presented a significant correlation with the intensity of complaints in the neck and shoulders in the last 12 months and in the last seven days. The total score of MUEQ-Br revised presented more important correlations with problems in these body regions and with the intensity of complaints in the upper back, wrists/hands and lower back in both periods. Conclusions. Companies should propose ways to assess the ergonomic and psychosocial risks among their employees in telework as a way to prevent the occurrence of musculoskeletal problems.