Job level risk assessment using task level ACGIH hand activity level TLV scores: a pilot study

Area of Science:

• Occupational Health
• Ergonomics
• Musculoskeletal Disorders

Background:

• Existing analytical tools for upper extremity musculoskeletal disorders often focus on single-task jobs.
• Many real-world jobs involve multiple tasks or job rotation, presenting a gap in risk assessment.
• Assessing risk in multi-task environments is crucial for preventing work-related injuries.

Purpose of the Study:

• To investigate modifications of the ACGIH Hand Activity Level (HAL) Threshold Limit Value (TLV) for assessing multi-task job risks.
• To explore methods for combining task-specific data into a comprehensive job-level risk assessment.
• To determine if a modified HAL TLV can effectively evaluate upper extremity risk in jobs with multiple tasks.

Main Methods:

• A case/control study design was employed.
• The American Conference of Governmental Industrial Hygienists (ACGIH) Hand Activity Level (HAL) Threshold Limit Value (TLV) was used as a base tool.
• Various methods were explored to integrate task differences and ratios into a job-level assessment.

Main Results:

• Two distinct methods of combining task data yielded significant odds ratios (p < .05).
• Odds ratios of 18.0 (95% CI 1.8-172) and 12.0 (95% CI 1.2-120) were observed.
• These findings suggest the modified ACGIH HAL TLV can offer insights into work-related risks.

Conclusions:

• A modified ACGIH HAL TLV shows promise for assessing upper extremity risk in multi-task jobs.
• The study highlights the potential of adapting existing tools for complex work environments.
• Further research is recommended to refine and optimize the modified assessment process.