Objective: To determine the accuracy of the Timed Up and Go Test (TUGT) for screening the risk of falls among community-dwelling elderly individuals. Method: This is a prospective cohort study with a randomly by lots without reposition sample stratified by proportional partition in relation to gender involving 63 community-dwelling elderly individuals. Elderly individuals who reported having Parkinson´s disease, a history of transitory ischemic attack, stroke and with a Mini Mental State Exam lower than the expected for the education level, were on a wheelchair and that reported a single fall in the previous six months were excluded. The TUGT, a mobility test, was the measure of interested and the occurrence of falls was the outcome. The performance of basic activities of daily living (ADL) and instrumental activities of daily living (IADL) was determined through the Older American Resources and Services, and the sociodemographic and clinical data were determined through the use of additional questionnaires. Receiver Operating Characteristic Curves were used to analyze the sensitivity and specificity of the TUGT. Results: Elderly individuals who fell had greater difficulties in ADL and IADL (p<0.01) and a slower performance on the TUGT (p=0.02). No differences were found in socio-demographic and clinical characteristics between fallers and non-fallers. Considering the different sensitivity and specificity, the best predictive value for discriminating elderly individuals who fell was 12.47 seconds [(RR=3.2) 95%CI: 1.3-7.7]. Conclusions: The TUGT proved to be an accurate measure for screening the risk of falls among elderly individuals. Although different from that reported in the international literature, the 12.47 second cutoff point seems to be a better predictive value for Brazilian elderly individuals.Keywords: elderly; falls; TUGT; sensitivity; specificity; physical therapy. ResumoObjetivo: Determinar a acurácia do Timed Up and Go Test (TUGT) para rastrear risco de quedas em idosos da comunidade. Método: Tratase de um estudo de coorte prospectivo com amostra sorteada aleatoriamente, sem reposição e estratificada por partilha proporcional em relação ao sexo de 63 idosos da comunidade. Excluíram-se idosos com doença de Parkinson, ataque isquêmico transitório, acidente vascular encefálico, Miniexame do Estado Mental inferior ao considerado normal de acordo com a escolaridade, movimentação exclusiva por cadeira de rodas e relato de uma queda nos seis meses anteriores à primeira entrevista. O TUGT, um teste de mobilidade, foi a medida testada, e o desfecho, a ocorrência de queda. Mensuraram-se atividades básicas (ABVD) e instrumentais de vida diária (AIVD) pela Older American Resources and Services e dados sociodemográficos e clínicos por questionário complementar. Para analisar a sensibilidade e a especificidade do TUGT, utilizou-se a Receiver Operating Characteristic Curves (ROC). Resultados: Os idosos que caíram tinham maior dificuldade na execução de ABVD e AIVD (p<0,01) e desempenho mais lento no TUG...
OBJETIVO: Verificar a associação entre a capacidade de executar as atividades instrumentais de vida diária (AIVDs) e a força de preensão palmar em idosos sem comprometimento cognitivo internados em enfermaria geriátrica. MÉTODOS: Estudo transversal. Foram incluídos pacientes idosos, com idade igual ou superior a 60 anos, de ambos os gêneros, admitidos em enfermaria de Geriatria. Foram excluídos indivíduos com doenças neurológicas, osteomusculares agudas e respiratórias exacerbadas; com indicação médica de repouso ou com uso de algum aparato clínico, bem como aqueles com déficits cognitivos e/ou delirium. Os dados foram coletados do prontuário e foi realizada a avaliação da capacidade de realizar atividades instrumentais de vida diária, por meio da Escala de Lawton, e a avaliação da força de preensão palmar, por meio da dinamometria do membro superior dominante. Os dados foram descritos em média e desvio- padrão. O teste de correlação de Pearson foi aplicado para verificar associação entre a capacidade de realizar AIVDs e a força de preensão palmar. RESULTADOS: Participaram do estudo 12 idosos (75% mulheres) com idade média de 80,67±6,35 anos. As médias da força de preensão palmar e pontuação total da Escala de Lawton foram 11,96±6,71 quilogramas-força (kgf) e 22,58±1,67 pontos, respectivamente. Verificou-se associação moderada e positiva entre a força de preensão palmar e a pontuação na Escala de Lawton (r=0,640; p=0,025). CONCLUSÃO: A capacidade de realizar AIVDs e a força de preensão palmar apresentaram associação na amostra estudada.
-Vanadium oxide supported on hydrotalcite-type precursors was studied in the oxidation of isopropanol. Hydrotalcites with different y = Mg/Al ratios were synthesized by the method of coprecipitation nitrates of Mg and Al cations with K 2 CO 3 as precipitant. The decomposition of these hydrotalcite precursors at 450°C yielded homogeneous MgyAlOx mixed oxides that contain the Al +3 cations totally incorporated into the MgO framework. The materials were characterized by chemical analysis, BET superficial area, X-ray diffraction, temperature-programmed reduction (TPR) and the reaction of isopropanol, a probe molecule used to evaluate the acid-base properties. The results of TPR showed that the reducibility of V +5 decreased with the increase in magnesium loading in catalysts. The X-ray diffraction patterns of Al-rich hydrotalcite precursors showed the presence of crystalline phases of brucite and gibbsite. It was shown that chemical composition, texture, acid-base properties of the active sites and also Mg/Al ratio strongly affect the formation of the products in the oxidation of isopropanol. The Al-rich catalysts were much more active than the Mg-rich ones, converting isopropanol mainly to propylene.
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