Relation between body composition, abdominal obesity, and lung function

Area of Science:

• Pulmonary Medicine
• Physiology
• Anthropometry

Background:

• Pulmonary function reference values typically account for age, sex, height, and ethnicity.
• Factors like weight and body composition also influence lung function but are less commonly integrated into reference standards.

Purpose of the Study:

• To investigate the relationship between body composition, abdominal obesity, and pulmonary function in a healthy adult population.
• To determine if body composition parameters should be considered for refining pulmonary function reference values.

Main Methods:

• Study included 284 healthy, non-smoking Finnish adults.
• Measurements included height, waist circumference, abdominal sagittal diameter, body composition, spirometry, and diffusion capacity (DLCO).

Main Results:

• Positive correlations were found between muscle mass and lean body mass with diffusion capacity (DLCO).
• No significant associations were observed between body composition and spirometry results.
• Inverse correlations were noted between abdominal sagittal diameter and waist circumference with the FEV1/FVC ratio.

Conclusions:

• Higher muscle and lean body mass are associated with increased diffusion capacity.
• Abdominal obesity, even minor, correlates with obstructive changes in spirometry.
• Findings suggest a need to re-evaluate current pulmonary function reference values to include body composition and abdominal obesity metrics.