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Summary
Farmer's lung patients who continue farming show initial lung function improvement, followed by a decline. Long-term, their pulmonary function remains comparable to those who left farming.
Area of Science:
- Respiratory Medicine
- Occupational Health
Background:
- Farmer's lung is a hypersensitivity pneumonitis caused by moldy hay exposure.
- Long-term effects of farmer's lung on pulmonary function are not fully understood.
Purpose of the Study:
- To evaluate the long-term pulmonary function in patients with farmer's lung.
- To compare outcomes between patients who continued farming and those who ceased contact with farm environments.
Main Methods:
- Follow-up study of 61 patients diagnosed with acute farmer's lung.
- Pulmonary function tests including carbon monoxide diffusing capacity (Dco) and total lung capacity (TLC) were performed.
- Patients were categorized based on continued or ceased contact with farming environments.
Main Results:
- Initial improvement in Dco and TLC was observed one to three years post-diagnosis.
- After five years, pulmonary function declined in both groups.
- No significant difference in Dco or TLC was found between patients who continued farming and those who ceased contact.
Conclusions:
- Long-term follow-up reveals comparable pulmonary function between farmer's lung patients who continued farming and those who ceased contact.
- While pulmonary function remains subnormal, continued farm work does not appear to worsen outcomes compared to cessation.