Cut-off of the 1-minute sit-to-stand test and quadriceps muscle strength to detect functional impairment ; Ponto de corte do teste de sentar-levantar de 1 minuto e da força muscular do quadricípite para detetar comprometimento funcional

The functional status decline is associated with the ageing process, is highly significant for people’s autonomy, and is an identifiable and modifiable trait. However, the assessment of functional status is not routinely implemented in clinical practice, and identifying its impairment is often challenging. This study aimed to establish cut-off values for the 1-minute sit-to-stand test (1-min STS) and quadriceps muscle strength to identify functional impairment in healthy people. A cross-sectional study was conducted with healthy people. Functional status was assessed with the 1-min STS, the 5-repetitions sit-to-stand test (5-STS) and quadriceps muscle strength. The ability of the 1-min STS and quadriceps muscle strength to discriminate presence/absence of functional impairment of participants based on the established cut-off of 12.1 seconds for the 5-STS was explored using receiver operating characteristic curve analysis stratified by sex. A total of 351 participants were included. Cut-off values of 25.5 repetitions for women (sensitivity = 91%; specificity = 95%) and 22.5 repetitions for men (sensitivity = 92%; specificity = 96%) in the 1-min STS, and 18.7kgf for women (sensitivity = 55%; specificity = 84%) and 26.7kgf for men (sensitivity = 90%; specificity = 69%) in the quadriceps muscle strength were identified. In conclusion, the 1-min STS and quadriceps muscle strength presented, respectively, an outstanding and excellent discriminate ability to identify functional impairment in healthy people. The cut-offs found can now be used to guide clinical decision-making to optimise health outcomes. ; O declínio do estado funcional está associado ao processo de envelhecimento, é altamente significativo para a autonomia das pessoas e é uma característica identificável e modificável. No entanto, a avaliação do estado funcional não é rotineiramente implementada na prática clínica e a identificação do seu comprometimento é muitas vezes desafiante. Este estudo teve como objetivo estabelecer valores de corte para o teste ...