0325/2023 - Desempenho do A Body Shape Index como discriminador de obesidade e obesidade sarcopênica – ELSA-Brasil Performance of the “A Body Shape Index” as a discriminator of obesity and sarcopenic obesity.
Objetivou-se determinar o desempenho diagnóstico do ABSI para obesidade e obesidade sarcopênica, comparado aos resultados da bioimpedância (BIA) e do IMC, por sexo e faixa etária. Trata-se de estudo seccional com 12.793 participantes da onda 2 do ELSA-Brasil, que obteve medidas de percentual de gordura corporal utilizando BIA e antropometria, verificando-se a performance dos testes diagnósticos para comparar os índices. Os resultados mostraram que, para obesidade, em homens nas três faixas etárias, a sensibilidade foi abaixo de 49%. A especificidade variou de 73% a 93%, sendo maior na faixa etária de 65 a 79 anos. Esse padrão foi encontrado para as mulheres, sendo a sensibilidade inferior a 42%; a especificidade variou entre 85% e 92%, sendo maior nas idosas. Quanto à obesidade sarcopênica, a sensibilidade e a especificidade entre os homens nas três faixas etárias foram de 72% e 99%, respectivamente. Entre as mulheres, a sensibilidade foi de aproximadamente 95% e a especificidade em torno de 70% em todas as faixas etárias. O ABSI, comparado à BIA, mostrou reduzida capacidade de discriminar obesidade. Mas, mostrou-se bom marcador de obesidade sarcopênica, comparado aos resultados da BIA em homens e mulheres em todas as faixas etárias.
Palavras-chave:
Body Shape Index; Sensibilidade e Especificidade; Obesidade; Obesidade Sarcopênica; Impedância Elétrica.
Abstract:
The objective was to determine the diagnostic performance of ABSI for obesity and sarcopenic obesity, compared with bioimpedance (BIA) and BMI results, by sex and age group. This is a cross-sectional study with 12,793 participants in wave 2 of the ELSA-Brasil, who obtained measurements of body fat percentage using BIA and anthropometry, verifying the performance of the diagnostic tests in order to compare the indices. The results showed that for obesity, in men in all three age groups the sensitivity was below 49%. Specificity ranged73% to 93%, with a higher percentage in the age group65 to 79 years. This pattern was also found for women, with sensitivity below 42% and specificity ranging85% to 92%, being higher in the elderly. As for sarcopenic obesity, the sensitivity and specificity among men in the three age groups were 72% was 99%, respectively. Among women sensitivity was approximately 95% and specificity around 70% in all age groups. ABSI, compared to BIA, showed a reduced ability to discriminate obesity. However, it proved to be a good marker of sarcopenic obesity, when compared with the results of BIA, in men and women in all age groups.
Keywords:
Body Mass Index; Sensitivity and Specificity; Obesity; Sarcopenic Obesity; Electric Impedance.
Performance of the “A Body Shape Index” as a discriminator of obesity and sarcopenic obesity.
Resumo (abstract):
The objective was to determine the diagnostic performance of ABSI for obesity and sarcopenic obesity, compared with bioimpedance (BIA) and BMI results, by sex and age group. This is a cross-sectional study with 12,793 participants in wave 2 of the ELSA-Brasil, who obtained measurements of body fat percentage using BIA and anthropometry, verifying the performance of the diagnostic tests in order to compare the indices. The results showed that for obesity, in men in all three age groups the sensitivity was below 49%. Specificity ranged73% to 93%, with a higher percentage in the age group65 to 79 years. This pattern was also found for women, with sensitivity below 42% and specificity ranging85% to 92%, being higher in the elderly. As for sarcopenic obesity, the sensitivity and specificity among men in the three age groups were 72% was 99%, respectively. Among women sensitivity was approximately 95% and specificity around 70% in all age groups. ABSI, compared to BIA, showed a reduced ability to discriminate obesity. However, it proved to be a good marker of sarcopenic obesity, when compared with the results of BIA, in men and women in all age groups.
Palavras-chave (keywords):
Body Mass Index; Sensitivity and Specificity; Obesity; Sarcopenic Obesity; Electric Impedance.
Silva, J.K, Aguiar, O.B, Diniz, M.F.H.S, Braga, J.U, Griep, R.H, Fonseca, M.J.M. Desempenho do A Body Shape Index como discriminador de obesidade e obesidade sarcopênica – ELSA-Brasil. Cien Saude Colet [periódico na internet] (2023/out). [Citado em 09/03/2025].
Está disponível em: http://cienciaesaudecoletiva.com.br/artigos/desempenho-do-a-body-shape-index-como-discriminador-de-obesidade-e-obesidade-sarcopenica-elsabrasil/18951?id=18951
