[Lung function and respiratory tract disease among stonewool factory workers]

Area of Science:

• Occupational Health
• Pulmonary Medicine
• Industrial Hygiene

Background:

• Assessed respiratory health in Danish workers exposed to man-made vitreous fibers (MMVF) during production.
• Investigated potential long-term health effects of occupational fiber exposure.

Purpose of the Study:

• To evaluate the respiratory health outcomes in a workforce exposed to man-made vitreous fibers (MMVF).
• To compare respiratory health parameters between MMVF-exposed workers and a control group without exposure.

Main Methods:

• Compared 377 workers with >5 years of MMVF exposure to 381 unexposed controls.
• Assessed respiratory health using questionnaires, dynamic spirometry, and lung transfer factor measurements.
• Included a sample of non-responders for questionnaire and spirometry assessment to ensure robust data.

Main Results:

• Most spirometric indices were comparable between exposed and control groups.
• A significantly higher proportion of exposed workers (14.5%) exhibited an obstructive flow pattern compared to controls (5.3%).
• Elevated risk of airway obstruction was primarily observed in heavy smokers within the exposed group; lung function tests and symptom reporting were otherwise similar.

Conclusions:

• No evidence of increased lung fibrosis risk was found in MMVF-exposed workers.
• A subset of exposed workers demonstrated airflow obstruction not attributable to known confounders.
• Potential additive or synergistic effects of smoking and MMVF exposure on airflow obstruction warrant further investigation.