Body composition in patients with chronic obstructive pulmonary disease

Area of Science:

• Pulmonary Medicine
• Nutritional Science
• Rehabilitation Medicine

Background:

• Body composition is vital in chronic obstructive pulmonary disease (COPD) management due to its impact on exercise capacity and prognosis.
• Nutritional depletion, including low body mass index (BMI) and fat-free mass index (FFMI), is prevalent in COPD patients.

Purpose of the Study:

• To characterize body composition in Romanian COPD patients undergoing pulmonary rehabilitation.
• To investigate the relationship between body composition parameters and disease severity (obstruction, exercise capacity, quality of life).
• To assess the correlation between segmental muscle mass and exercise capacity.

Main Methods:

• Direct segmental multi-frequency bioelectrical impedance analysis (BIA) for body composition.
• Pulmonary function tests, six-minute walking test (6MWT), and COPD Assessment Test (CAT) for disease severity.
• Study included 36 consecutive COPD patients.

Main Results:

• Prevalence of nutritional depletion (low BMI and/or FFMI) was 22.2% in Romanian COPD patients.
• Lower FFMI was associated with reduced exercise capacity (6MWT) and worse quality of life (CAT scores).
• Sarcopenia (low FFMI, normal BMI) correlated with the lowest maximal inspiratory pressure (MIP) and 6MWD, and highest CAT scores. Segmental analysis showed unbalanced muscle mass linked to lower exercise capacity.

Conclusions:

• Body composition assessment is valuable for COPD patients in pulmonary rehabilitation settings.
• Nutritional depletion is common, and FFMI and skeletal muscle mass index (SMMI) correlate with respiratory muscle strength and exercise capacity.
• Segmental body composition analysis can identify patients with reduced exercise capacity.