Relationship Between Body Mass Index and Low Skeletal Muscle Mass in Adults Based on NHANES 2011–2018

Abstract Sarcopenia, a syndrome characterized by declining muscle mass and function, is associated with various adverse health outcomes. While body mass index (BMI) is a fundamental health indicator, its relationship with sarcopenia is complex and remains inadequately explored. Low BMI has been link...

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Main Authors: Rong-Zhen Xie, Xu-Song Li, Fang-Di Zha, Guo-Qing Li, Wei-Qiang Zhao, Yu-Feng Liang, Jie-Feng Huang
Format: Article
Language:English
Published: Nature Portfolio 2025-01-01
Series:Scientific Reports
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Online Access:https://doi.org/10.1038/s41598-025-87176-4
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author Rong-Zhen Xie
Xu-Song Li
Fang-Di Zha
Guo-Qing Li
Wei-Qiang Zhao
Yu-Feng Liang
Jie-Feng Huang
author_facet Rong-Zhen Xie
Xu-Song Li
Fang-Di Zha
Guo-Qing Li
Wei-Qiang Zhao
Yu-Feng Liang
Jie-Feng Huang
author_sort Rong-Zhen Xie
collection DOAJ
description Abstract Sarcopenia, a syndrome characterized by declining muscle mass and function, is associated with various adverse health outcomes. While body mass index (BMI) is a fundamental health indicator, its relationship with sarcopenia is complex and remains inadequately explored. Low BMI has been linked to muscle loss, but the role of other demographic and clinical factors in this relationship is unclear. This cross-sectional study analyzed data from the NHANES 2011–2018 cohort, including 7,455 adults aged ≥ 20 years. Low muscle mass was diagnosed based on appendicular skeletal muscle mass using DXA criteria. BMI was categorized into quartiles for analysis. Weighted multivariable logistic regression assessed associations between BMI and low muscle mass, adjusting for confounders such as age, gender, ethnicity, income-to-poverty ratio, and chronic diseases (e.g., diabetes and hypertension). Variance inflation factors (VIF) confirmed the absence of multicollinearity. Lower BMI was significantly associated with higher odds of low muscle mass (adjusted OR: 0.508, 95% CI: 0.483–0.533, p < 0.001), while higher BMI exhibited a protective effect. Age (OR: 1.035, 95% CI: 1.025–1.045, p < 0.001) and female gender (OR: 1.570, 95% CI: 1.267–1.949, p < 0.001) were independent risk factors. Racial disparities were noted, with non-Hispanic Black individuals at lower risk compared to non-Hispanic Whites (OR: 0.242, 95% CI: 0.152–0.384, p < 0.001). Other significant factors included diabetes and alcohol consumption, while education and smoking status were not significantly associated. BMI is inversely associated with low muscle mass prevalence, with lower BMI posing a higher odds. The findings underscore the clinical importance of monitoring BMI and addressing multifactorial risk profiles for low muscle mass management and prevention.
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spelling doaj-art-915c61c7d38944cdb11b13fce0c48cc42025-01-26T12:33:40ZengNature PortfolioScientific Reports2045-23222025-01-0115111110.1038/s41598-025-87176-4Relationship Between Body Mass Index and Low Skeletal Muscle Mass in Adults Based on NHANES 2011–2018Rong-Zhen Xie0Xu-Song Li1Fang-Di Zha2Guo-Qing Li3Wei-Qiang Zhao4Yu-Feng Liang5Jie-Feng Huang6Department of Orthopaedics & Traumatology, The First Affiliated Hospital of Zhejiang Chinese Medical UniversityDepartment of Orthopaedics and Traumatology, Zhongshan Hospital of Traditional Chinese MedicineWenzhou Medical UniversityZhejiang Chinese Medical UniversityDepartment of Orthopaedics & Traumatology, The First Affiliated Hospital of Zhejiang Chinese Medical UniversityDepartment of Orthopaedics & Traumatology, The First Affiliated Hospital of Zhejiang Chinese Medical UniversityDepartment of Orthopaedics & Traumatology, The First Affiliated Hospital of Zhejiang Chinese Medical UniversityAbstract Sarcopenia, a syndrome characterized by declining muscle mass and function, is associated with various adverse health outcomes. While body mass index (BMI) is a fundamental health indicator, its relationship with sarcopenia is complex and remains inadequately explored. Low BMI has been linked to muscle loss, but the role of other demographic and clinical factors in this relationship is unclear. This cross-sectional study analyzed data from the NHANES 2011–2018 cohort, including 7,455 adults aged ≥ 20 years. Low muscle mass was diagnosed based on appendicular skeletal muscle mass using DXA criteria. BMI was categorized into quartiles for analysis. Weighted multivariable logistic regression assessed associations between BMI and low muscle mass, adjusting for confounders such as age, gender, ethnicity, income-to-poverty ratio, and chronic diseases (e.g., diabetes and hypertension). Variance inflation factors (VIF) confirmed the absence of multicollinearity. Lower BMI was significantly associated with higher odds of low muscle mass (adjusted OR: 0.508, 95% CI: 0.483–0.533, p < 0.001), while higher BMI exhibited a protective effect. Age (OR: 1.035, 95% CI: 1.025–1.045, p < 0.001) and female gender (OR: 1.570, 95% CI: 1.267–1.949, p < 0.001) were independent risk factors. Racial disparities were noted, with non-Hispanic Black individuals at lower risk compared to non-Hispanic Whites (OR: 0.242, 95% CI: 0.152–0.384, p < 0.001). Other significant factors included diabetes and alcohol consumption, while education and smoking status were not significantly associated. BMI is inversely associated with low muscle mass prevalence, with lower BMI posing a higher odds. The findings underscore the clinical importance of monitoring BMI and addressing multifactorial risk profiles for low muscle mass management and prevention.https://doi.org/10.1038/s41598-025-87176-4Muscle lossDiabetesAgingObesity paradoxBody status
spellingShingle Rong-Zhen Xie
Xu-Song Li
Fang-Di Zha
Guo-Qing Li
Wei-Qiang Zhao
Yu-Feng Liang
Jie-Feng Huang
Relationship Between Body Mass Index and Low Skeletal Muscle Mass in Adults Based on NHANES 2011–2018
Scientific Reports
Muscle loss
Diabetes
Aging
Obesity paradox
Body status
title Relationship Between Body Mass Index and Low Skeletal Muscle Mass in Adults Based on NHANES 2011–2018
title_full Relationship Between Body Mass Index and Low Skeletal Muscle Mass in Adults Based on NHANES 2011–2018
title_fullStr Relationship Between Body Mass Index and Low Skeletal Muscle Mass in Adults Based on NHANES 2011–2018
title_full_unstemmed Relationship Between Body Mass Index and Low Skeletal Muscle Mass in Adults Based on NHANES 2011–2018
title_short Relationship Between Body Mass Index and Low Skeletal Muscle Mass in Adults Based on NHANES 2011–2018
title_sort relationship between body mass index and low skeletal muscle mass in adults based on nhanes 2011 2018
topic Muscle loss
Diabetes
Aging
Obesity paradox
Body status
url https://doi.org/10.1038/s41598-025-87176-4
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