Massa muscular, força e desempenho funcional em idosos clientes de uma operadora de saúde, que vivem na zona norte da cidade do Rio de Janeiro: um estudo sobre sarcopenia e sua associação com fatores sociodemográficos, funcionalidade, comorbidades e mortalidade

• Autor(a) principal: Moreira, Virgilio Garcia
• Data de Publicação: 2017
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/8542
• topic: Sarcopenia; Prevalence; Mortality; Muscle strength; Gait speed; Muscle mass; Elderly; Sarcopenia; Prevalência; Mortalidade; Força muscular; Velocidade da marcha; Massa muscular; Idosos; Sarcopenia; Força muscular; Locomoção humana; Idosos Saúde; Músculos; CNPQ::CIENCIAS DA SAUDE::MEDICINA::CLINICA MEDICA

Sarcopenia is identified as the loss of quantity and quality of muscle associated with aging and is directly involved with undesirable outcomes. In Brazil, little is known about this condition. The objective of the present study is to analyze its prevalence and associated factors and, in addition, to analyze its association with mortality in a population sample of the community. It is a longitudinal study entitled Frailty in Brazilian Elderly People. A cohort of 745 individuals was assessed longitudinally on three waves over seven years. Sociodemographic assessments, functional capacity, self-perception of health and anthropometric measures were carried out in the first and third waves of research and, in the third wave, mortality data were collected. Sarcopenia was defined through 3 variables: muscle mass, muscular strength and functional performance. The first one was identified through an anthropometric formula and those of the first quintile by sex were considered as cases. For the second item the handgrip strength was measured through the manual dynamometer through 3 measurements. It was considered cases those in which the mean corresponded to the first quintile by sex and body mass index. For the third item was measured the time spent to walk 4.6 meters. After the gait speed was calculated, the first quintile by sex and height were considered cases. Pre-sarcopenia were defined as those with exclusive alteration of muscle mass, sarcopenic ones with alteration in muscle mass and gait speed, or, handgrip strength and severe sarcopenia those with three altered items. A comparative analysis was performed between the cutoff points of affluent populations and those delimited in the present study. The Kaplan-Meier and Cox Regression analyzes were used to analyze the mortality data. As results it was observed that the prevalence of sarcopenia was 10.8% associated with age, ethnicity, widows or separated and comorbidities (p <0.001). When the cutoff points of affluent populations were used, this prevalence was 18%. Regarding mortality, it was observed that sarcopenia is directly associated with mortality in the adjusted model [OR: 1.8 (1.2 - 2.8) p <0.001]. Muscle mass, strength and gait speed were also associated with mortality in the unadjusted model. We conclude that the prevalence of sarcopenia is compatible with the international literature when the cutoff points were used and that sarcopenia was associated with mortality in the present sample. Further studies are needed to identify the relevance of diagnostic criteria for sarcopenia.