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[Variability of respiratory function tests 9 weeks observation (author's transl)]
Revue D'Epidemiologie Et De Sante Publique
|January 1, 1981
Summary
Pulmonary function tests in healthy males showed greater variability over nine weeks than expected. Some lung function indices, including transfer factor and closing volume, varied significantly, highlighting the need for long-term monitoring.
Area of Science:
- Pulmonary Physiology
- Respiratory Medicine
Context:
- Longitudinal studies are crucial for understanding physiological variations.
- Field studies present unique challenges for data consistency.
Purpose:
- To assess the week-to-week variability of pulmonary function indices in healthy young males over a nine-week period.
- To identify specific lung function parameters that exhibit significant fluctuations.
Summary:
- Forty-two healthy males (19-27 years) underwent weekly pulmonary function testing for nine weeks.
- Measurements included spirometry (vital capacity, FEV1.0, peak flow), single-breath nitrogen tests (slope of phase III, closing volume/vital capacity ratio), and carbon monoxide transfer tests.
- Greater variability was observed compared to shorter-term studies, with significant changes noted in V 0.25 VC, CO transfer indices, and CV/VC ratio.
Impact:
- Highlights the importance of considering longer observation periods in pulmonary research.
- Suggests that environmental or testing factors may influence pulmonary index variability.
- Provides a baseline for interpreting results in prospective studies involving pulmonary function.