Association between skeletal muscle index and lung function in populations with different characteristics

Area of Science:

• Pulmonary Medicine
• Sarcopenia Research
• Nutritional Science

Background:

• Limited research exists on the association between sarcopenia and preserved ratio impaired lung function (PRISm).
• Sarcopenia, characterized by low skeletal muscle mass, may impact respiratory function.
• Understanding this relationship is crucial for comprehensive patient care.

Purpose of the Study:

• To investigate the association between skeletal muscle index (SMI) and lung function indicators.
• To specifically examine this relationship within the PRISm population.
• To compare findings across obstructive spirometry, PRISm, and normal spirometry groups.

Main Methods:

• Utilized data from the National Health and Nutrition Examination Survey (NHANES) 2011-2012.
• Categorized participants into obstructive spirometry, PRISm, and normal spirometry groups.
• Employed multiple linear regression to analyze the relationship between SMI and lung function (FEV1, FVC).

Main Results:

• A significant positive association was found between SMI and lung function indicators across all groups.
• In the PRISm group, a 0.1 unit increase in SMI correlated with increased FEV1 (0.184 L) and FVC (0.222 L).
• Similar positive associations were observed in obstructive (FEV1: 0.214 L, FVC: 0.339 L) and normal spirometry groups (FEV1: 0.240 L, FVC: 0.316 L).

Conclusions:

• This study demonstrates a significant positive association between SMI and lung function in the PRISm population.
• The findings confirm a consistent relationship between skeletal muscle mass and respiratory capacity.
• These results underscore the importance of considering muscle health in respiratory assessments.