Distributing cumulative spinal loads among a diverse workforce - using math modelling to explore workload equality vs...

Area of Science:

• Occupational Health
• Ergonomics
• Public Health

Background:

• Musculoskeletal disorders (MSDs) are a significant occupational health concern.
• Worker susceptibility to MSDs is influenced by both work-related and individual risk factors (RF).
• Workplace management must consider how to distribute risks when individual worker vulnerabilities differ.

Purpose of the Study:

• To mathematically model and assess the consequences of equality and equity policies on workers' MSD risks.
• To inform researchers and practitioners about the implications of different risk management strategies.
• To evaluate the effectiveness of administrative control policies versus engineering controls for MSD risk reduction.

Main Methods:

• Development of a mathematical model to assess workers' MSD risks.
• Utilized logistic regression for risk assessment within the model.
• Applied the model to existing epidemiological data on MSDs.

Main Results:

• Neither equality (equal work-related RF distribution) nor equity (equal net MSD risk distribution) policies demonstrated a net benefit at the group level.
• Risk reduction was not achieved; rather, risks were shifted among workers.
• Administrative control strategies showed limited impact on overall workforce MSD rates.

Conclusions:

• Workload equality and injury risk equity policies are largely ineffective in reducing overall workforce MSD rates.
• Administrative controls alone may not be sufficient for managing occupational injury risks.
• Engineering controls aimed at reducing overall workload levels are recommended for substantial MSD risk reduction.