Back injury in municipal workers: a case-control study

Area of Science:

• Occupational Health
• Epidemiology
• Ergonomics

Background:

• Acute low back injury is a prevalent occupational hazard, particularly among municipal employees.
• Understanding contributing factors is crucial for developing effective prevention strategies.

Purpose of the Study:

• To identify key factors associated with acute low back injury in a large municipal workforce.
• To analyze the impact of job strain, physical characteristics, and work movements on injury risk.

Main Methods:

• A case-control study involving 200 injured employees and 400 matched coworker controls.
• Data collection through in-person interviews covering demographics, work history, psychosocial factors, and anthropometrics.
• Multivariate logistic regression and factor analysis were employed to identify risk factors.

Main Results:

• High job strain emerged as the most significant risk factor for acute low back injury (OR = 2.12).
• A dose-response relationship was observed for job strain.
• Elevated Body Mass Index (OR = 1.54) and specific work movements (OR = 1.42) were also significant contributing factors.

Conclusions:

• Reducing job strain through increased worker control may mitigate low back injury risk.
• Implementing ergonomic interventions and worksite health promotion programs are recommended for prevention.