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do Nascimento RA, Vieira MCA, Dos Santos Aguiar Gonçalves RS, Moreira MA, de Morais MSM, da Câmara SMA, Maciel ÁCC. Cutoff points of adiposity anthropometric indices for low muscle mass screening in middle-aged and older healthy women. BMC Musculoskelet Disord 2021; 22:713. [PMID: 34416881 PMCID: PMC8379807 DOI: 10.1186/s12891-021-04532-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Accepted: 07/20/2021] [Indexed: 12/25/2022] Open
Abstract
Background The reduction of female sex hormones causes changes in the contractile properties of muscles as well as infiltration of fat in the muscle tissue. This results in a consequent decline in muscle strength. These changes are related to higher levels of functional impairment and physical disability. In this sense, several anthropometric indices have been used to quantify body and visceral fat. Thus, the objective of this paper is to propose cutoff points for adiposity anthropometric indices in order to identify low muscle mass, as well as to analyze the relationship between these indices and low muscle mass in middle-aged and older women. Methods Cross-sectional analytical study carried out in the Northeast of Brazil. The sample was formed by 593 women between 40—80 years old. Data collection included anthropometric assessment (BMI: Body Mass Index – WC: Waist Circumference – WHR: Waist-to-hip Ratio – WHtR: Waist-to-height Ratio – CI: Conicity Index – BAI: Body Adiposity Index – VAI: Visceral Adiposity Index – LAP: Lipid Accumulation Product), bioimpedance test and biochemical dosage. Moreover, sociodemographic data and practice of physical activity were collected. Descriptive statistics, Student's t-test, ROC curves, chi-squared and logistic regression were performed. Results The participants had a mean age of 53.11 (8.89) years, BMI of 28.49 (5.17) kg/m2 and WC of 95.35 (10.39). The prevalence of low muscle mass was 19.4%. Based on sensitivity and specificity of adiposity anthropometric indices, cutoff points were developed to identify the presence of low muscle mass (p < 0.05), except for VAI. After logistic regression, WC (OR = 6.2; CI 95%: 1.4—28.1), WHR (OR = 1.8; CI: 1.0—3.4), WHtR (OR = 5.0; CI 95%: 1.0—23.7) and BAI (OR = 14.5; CI 95%: 6.6—31.7) were associated with low muscle mass. Conclusions All anthropometric indices, except VAI, showed adequate accuracy in identifying low muscle mass in women, especially those that took into account WC. This suggests that they can become accessible and also be cost-effective strategies for assessing and managing health outcomes related to muscle mass analysis.
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Affiliation(s)
- Rafaela Andrade do Nascimento
- Physiotherapy, Department of Federal, University of Rio Grande Do Norte, 3000 Senador Salgado Filho Avenue, S/N, Lagoa Nova, Natal, RN, CEP: 59072-970, Brazil.
| | - Mariana Carmem Apolinário Vieira
- Physiotherapy, Department of Federal, University of Rio Grande Do Norte, 3000 Senador Salgado Filho Avenue, S/N, Lagoa Nova, Natal, RN, CEP: 59072-970, Brazil
| | | | - Mayle Andrade Moreira
- Physiotherapy Department of Federal, University of Ceará, 949 Alexandre Baraúna St, Rodolfo Teófilo, Fortaleza, CEP: 60430-110, Brazil
| | - Maria Socorro Medeiros de Morais
- Health Sciences Center of Federal, University of Rio Grande Do Norte, General Gustavo Cordeiro de Farias St, Petrópolis, Natal, RN, CEP 59012-570, Brazil
| | | | - Álvaro Campos Cavalcanti Maciel
- Physiotherapy, Department of Federal, University of Rio Grande Do Norte, 3000 Senador Salgado Filho Avenue, S/N, Lagoa Nova, Natal, RN, CEP: 59072-970, Brazil
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Low serum TSH levels are associated with low values of fat-free mass and body cell mass in the elderly. Sci Rep 2021; 11:10547. [PMID: 34006958 PMCID: PMC8131378 DOI: 10.1038/s41598-021-90178-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Accepted: 04/29/2021] [Indexed: 11/08/2022] Open
Abstract
Previous studies on the association between thyroid function and body composition are conflicting and showed strong differences across age groups. Our aim was to clarify age-specific associations of serum thyroid-stimulating hormone (TSH) levels with markers of body composition including body mass index (BMI), waist circumference, fat mass (FM), fat-free mass (FFM) and body cell mass (BCM). We used data from two independent population-based cohorts within the framework of the Study of Health in Pomerania. The study population included 5656 individuals aged 20 to 90 years. Markers of body composition were measured by bioelectrical impedance analysis. Serum TSH levels were significantly positively associated with BMI (β = 0.16; 95% confidence interval [CI]: 0.06 to 0.27), waist circumference (β = 0.35; 95% CI: 0.08 to 0.62) and FM (β = 0.32; 95% CI: 0.12 to 0.52), but not with FFM and BCM. Interaction analysis revealed positive associations of serum TSH levels with BMI, waist circumference, FM, FFM and BCM in individuals older than 60 years, while no such associations were observed in younger individuals. We demonstrated that lower serum TSH levels were accompanied with lower values of BMI, waist circumference, FM, FFM, and BCM in the elderly, while no such associations were observed in younger individuals.
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