Association between newly developed body indices with total and trunk fat mass in older adults

• Autor(a) principal: Capilé, Nuno Pedro Caldas Soares de Sousa
• Data de Publicação: 2018
• Tipo de documento: Dissertação
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10400.5/15622
• topic: ABSI; BAI; BMI; BRI; Elderly; Fat Mass; WHtR; Trunk fat mass; DXA; ABSI; BAI; BRI; IMC; WHtR; Pessoas idosas; DXA; Massa gorda; Massa gorda do tronco; Domínio/Área Científica::Ciências Médicas::Ciências da Saúde

Objective: In recent years, new body indexes have been developed, such as Body Shape Index (ABSI), Body Adiposity Index (BAI), Body Roundness Index (BRI) and Waist-to-Height Ratio (WHtR), in order to have better body fat indexes than the Body Mass Index (BMI). Thus, the present research aims to analyze the relationship between the various body indexes and the total fat mass (FM) and FM of the trunk in the elderly. Methods: In this cross-sectional observational study, 129 people (87 women and 42 men) aged 60 to 84 were evaluated through dual energy radiological densitometry, to obtain the FM measurements, and anthropometric measurements, for subsequent calculation of the indexes. Subsequently, correlation analysis were performed between the total percentage of FM and the total percentage of fat mass of the trunk and the body indexes. Linear, simple and multiple regressions were performed to verify the association between the indexes and the percentage of total FM. Data analysis was performed using the IBM SPSS Statistics version 25.0. Results: In women ABSI was not associated with either total or trunk FM. Regarding the remaining indexes, all of the indexes were associated with the adiposity assessed by DXA (total: r> 0.649; trunk r> 0.520). The index with a greater explanatory power was the BMI (r = 0.798) for the total FM and the WHtR (r = 0.783) for the FM of the trunk. In men, all indexes were associated with either the total FM (r> 0.427) or the FM of the trunk (r> 0.463). For the total FM (r = 0.742) and for the trunk FM (R = 0.713) the WHtR presented a greater explanation of the fat mass of DXA. It should be noted, however, that there were no significant differences between the indexes and that the associations remained similar when adjusted for the appendicular fat-free mass index. Conclusions: BMI, despite the limitations that the index demonstrates, presents similar or even better associations than new body indexes to estimate total and trunk adiposity in the elderly.