Background: Healthy individuals without respiratory symptoms can sometimes present with low FEV/FVC. The objective of this study was to characterize and compare subjects without symptoms and with reduced FEV/FVC but normal FEV with subjects with mild obstructive lung disease.
Methods: Fifty healthy subjects with FEV/FVC below the fifth percentile of reference values (normal variants) were compared with 52 subjects with asthma and 48 subjects with COPD who had similar FEV/FVC.
Hypersensitivity pneumonitis (HSP) is a common interstitial lung disease resulting from inhalation of a large variety of antigens by susceptible individuals. The disease is best classified as acute and chronic. Chronic HSP can be fibrosing or not.
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