Análise de fatores extrínsecos e intrínsecos que predispõem a quedas em idosos

Effects of a case management-based intervention on non-motor risk factors for falls in older people with history of falls: a randomised clinical trial

BACKGROUND

Falls are directly related to morbidity and mortality of older people. Multifactorial approaches that are individualised and based on fall risk factors are necessary. This study aims to verify the effects of a case management-based intervention on non-motor risk factors for falls in community-dwelling older people with a history of falls.

METHODS

The intervention applied a multidimensional assessment of risk factors for falls, a discussion about the identified risk factors, the preparation of an individualised plan with the participant, and the application, monitoring and review of the plan.

RESULTS

There was a significant interaction between groups and assessments only in the visuospatial domain (P = 0.031). After simple main effects analysis, differences between groups and assessments were not significant, although there was a tendency of worse visuospatial performance in the control group in the follow-up assessment (P = 0.099). There were no significant differences between groups or between assessments in other variables.

CONCLUSION

The intervention has the potential to maintain non-motor risk factors for falls in community-dwelling older people with a history of falls. However, more clinical trials are needed to prove its effects.

The effects of plantarflexor weakness and reduced tendon stiffness with aging on gait stability

Falls among older adults are a costly public health concern. Such falls can be precipitated by balance disturbances, after which a recovery strategy requiring rapid, high force outputs is necessary. Sarcopenia among older adults likely diminishes their ability to produce the forces necessary to arrest gait instability. Age-related changes to tendon stiffness may also delay muscle stretch and afferent feedback and decrease force transmission, worsening fall outcomes. However, the association between muscle strength, tendon stiffness, and gait instability is not well established. Given the ankle's proximity to the onset of many walking balance disturbances, we examined the relation between both plantarflexor strength and Achilles tendon stiffness with walking-related instability during perturbed gait in older and younger adults-the latter quantified herein using margins of stability and whole-body angular momentum including the application of treadmill-induced slip perturbations. Older and younger adults did not differ in plantarflexor strength, but Achilles tendon stiffness was lower in older adults. Among older adults, plantarflexor weakness associated with greater whole-body angular momentum following treadmill-induced slip perturbations. Weaker older adults also appeared to walk and recover from treadmill-induced slip perturbations with more caution. This study highlights the role of plantarflexor strength and Achilles tendon stiffness in regulating lateral gait stability in older adults, which may be targets for training protocols seeking to minimize fall risk and injury severity.

Foreseeing future falls with accelerometer features in active community-dwelling older persons with no recent history of falls

BACKGROUND

Acceleration sensors are a viable option for monitoring gait patterns and its application on monitoring falls and risk of falling. However the literature still lacks prospective studies to investigate such risk before the occurrence of falls.

OBJECTIVE

To investigate features extracted from accelerometer signals with the purpose of predicting future falls in individuals with no recent history of falls.

METHODS

In this study we investigate the risk of fall in active and healthy community-dwelling living older persons with no recent history of falls, using a single accelerometer and variants of the Timed Up and Go (TUG) test. A prospective study was conducted with 74 healthy non-fallers older persons. After collecting acceleration data from the participants at the baseline, the occurrence of falls (outcome) was monitored quarterly during one year. A set of frequency features were extracted from the signal and their ability to predict falls was evaluated.

RESULTS

The best individual feature result shows an accuracy of 0.75, sensitivity of 0.71 and specificity of 0.76. A fusion of the three best features increases the sensitivity to 0.86. On the other hand, the cut-off points of the TUG seconds, often used to assess fall risk, did not demonstrate adequate sensitivity.

CONCLUSION

The results confirms previous evidence that accelerometer features can better estimate fall risk, and support potential applications that try to infer falls risk in less restricted scenarios, even in a sample stratified by age and gender composed of active and healthy community-dwelling living older persons.

REFERENCE VALUES FOR BALANCE IN PHYSICALLY ACTIVE ELDERLY WOMEN

ABSTRACT Introduction Body balance is one of the most important factors related to falls, quality of life, and independence, and its evaluation is therefore important. Objective To establish reference values for balance tests in physically active older women from different age groups. Methods The sample consisted of 192 physically active women aged 60 to 79 years who were submitted to the following tests: timed up and go (TUG), one-leg stand (OLS), five-repetition chair stand (CS-5), functional reach (FR), and tandem stand test (TST). Descriptive statistics (percentile analysis) and the Mann-Whitney U test were used. Results In older women aged 60 to 69 years, the values indicating “good” balance were a score less than 5.7 s in the TUG, achieving 30 s of OLS, performing the CS-5 test in less than 8.5 s, and a result greater than 35.5 cm in the FR test. In older women aged 70 to 79 years, the values indicating “good” balance were a score less than 5.9 s in the TUG, achieving 30 s of OLS, performing the CS-5 in less than 8.5 s, and a result greater than 33 cm in the FR test. In the TST, most of the physically active subjects achieved the ceiling performance. Conclusion The reference values obtained are similar to or better than those reported in the literature. The use of the TST is not recommended for physically active older women because of its low discriminatory power in this group. Level of evidence III; Study of non consecutive patients; without consistently applied reference ‘‘gold’’ standard.

Prevalence of falls in elderly people: a population based study

INTRODUCTION

The occurrence of falls is related to a complex interaction of risk factors, aggravated by aging. This research aimed to investigate the occurrence of falls in the elderly, as well as to identify the risk factors for this event.

METHODS

A cross-sectional, population-based study conducted in a municipality in the extreme south of Brasil. Probabilistic sampling was used, the sample unit being the census tracts. Data were collected through home interviews. The research was approved by the research ethics committee.

RESULTS AND DISCUSSION

This study was performed using a sample of 211 elderly individuals. The prevalence of falls was 28.9% (95% CI 22.8 to 35.0). (P = 0.01), living alone (p = 0.04), self-perception of regular or poor health (p = 0.03), and obesity (p= 0.01).

CONCLUSIONS

We found that approximately one in three elderly individuals fell in the last year.

Non-pharmacological motor-cognitive treatment to improve the mental health of elderly adults

OBJECTIVE

To propose a program of physical-cognitive dual task and to measure its impact in Chilean institutionalized elderly adults.

METHOD

Experimental design study with pre and post-intervention evaluations, measuring the cognitive and depressive levels by means of the Pfeiffer test and the Yesavage scale, respectively. The program was applied for 12 weeks to adults between 68 and 90 years old. The statistical analysis was based on the nonparametric Wilcoxon test for paired samples and was contrasted with its parametric version. The statistical software R was used.

RESULTS

Statistically significant differences were obtained in the cognitive level (p-value < 0.05) and highly significant (p-value < 0.001) in the level of depression with both tests (parametric and nonparametric).

CONCLUSION

Due to the almost null evidence of scientific interventions of programs that integrate physical activity and cognitive tasks together in Chilean elderly adults, a program of physical-cognitive dual task was proposed as a non-pharmacological treatment, easy to apply and of low cost to benefit their integral health, which improves significantly the cognitive and depressive levels of institutionalized elderly adults.

Prevalence of household falls in long-lived adults and association with extrinsic factors

Objective:

to identify the prevalence of falls among older adults and the extrinsic factors associated with them.

Method:

population-based cross-sectional study with 350 older adults. A household survey was conducted using a questionnaire addressing socio-demographic, clinical, and environmental characteristics. Data were analyzed using Stata Software V.10. Pearson’s chi-square test and logistic regression analysis were used with stepwise criteria for selection of variables in the model, with measures of effect expressed in Prevalence Ratio. For input into the multiple model, the variables with p ≤ 0.20 were considered. All ethical care regarding research on human beings has been observed and respected.

Results:

the prevalence of falls was 46.9%. The extrinsic factors associated with falls were: stairs, uneven floor and pets in the main entrance, lack of anti-slip loose throw rugs and slippery floor in the kitchen, lack of anti-slip loose throw rugs and objects on the floor in the room, lack of grab bars in the shower, lack of grab bars in the toilet and switch away from the bathroom door (p <0.05).

Conclusion:

falls are frequent in long-lived adults. The identification of the extrinsic factors associated with the occurrence of this event can help in its prevention.

Better than counting seconds: Identifying fallers among healthy elderly using fusion of accelerometer features and dual-task Timed Up and Go

Devices and sensors for identification of fallers can be used to implement actions to prevent falls and to allow the elderly to live an independent life while reducing the long-term care costs. In this study we aimed to investigate the accuracy of Timed Up and Go test, for fallers’ identification, using fusion of features extracted from accelerometer data. Single and dual tasks TUG (manual and cognitive) were performed by a final sample (94% power) of 36 community dwelling healthy older persons (18 fallers paired with 18 non-fallers) while they wear a single triaxial accelerometer at waist with sampling rate of 200Hz. The segmentation of the TUG different trials and its comparative analysis allows to better discriminate fallers from non-fallers, while conventional functional tests fail to do so. In addition, we show that the fusion of features improve the discrimination power, achieving AUC of 0.84 (Sensitivity = Specificity = 0.83, 95% CI 0.62-0.91), and demonstrating the clinical relevance of the study. We concluded that features extracted from segmented TUG trials acquired with dual tasks has potential to improve performance when identifying fallers via accelerometer sensors, which can improve TUG accuracy for clinical and epidemiological applications.

Falls among the non-institutionalized elderly in northern Minas Gerais, Brazil: prevalence and associated factors

Abstract Objective: To identify the prevalence of falls and associated factors in non-institutionalized elderly persons. Methods: A cross-sectional study featuring a population-based sample of non-institutionalized elderly persons in a city in the north of Minas Gerais was performed. Interviews were conducted in households by trained staff using validated instruments. We investigated the associations between falls and demographic, socioeconomic and health-related factors. After bivariate analysis, the variables associated with falls to a level of 20% were analyzed together using logistic regression, assuming at this stage a significance level of 5%. Results: The studied population was predominantly female, married and with a low educational level. The prevalence of falls was 28.4%. The factors that were associated with falls were: female gender (OR=1.67; 95% CI:1.13 to 2.47); negative self-evaluation of health (OR=1.49; 95% CI: 1.02 to 2.20); impaired functional mobility (Timed Up and Go test >20 seconds) (OR=1.66; 95CI: 1.02-2.74); the occurrence of hospitalization in the previous 12 months (OR=1.82; 95% CI: 1.17 to 2.84); and frailty measured by the Edmonton Frail Scale (OR=1.73; 95% CI: 1.14 to 2.64). Conclusions: The prevalence of falls was high for the population studied and was related to the individual health conditions of the elderly.

Relação da pressão plantar e amplitude de movimento de membros inferiores com o risco de quedas em idosas

RESUMO Objetivou-se verificar a influência das variáveis de pressão plantar e amplitude de movimento (ADM) de quadril, joelho e tornozelo sobre o risco de quedas em idosas. Participaram 39 idosas, avaliando-se a Pressão Máxima e Média sobre a plataforma de baropodometria. Em seguida, realizou-se o teste Timed Up and Go (TUG) e posteriormente a avaliação da ADM de flexão de quadril e joelho e flexão plantar e dorsal de tornozelo por meio de um goniômetro. As variáveis baropodométricas (Pressão Máxima e Pressão Média) tenderam a influenciar os valores do TUG conforme valor do teste de hipótese (p=0,051), demonstrando correlação moderada (r=0,487), com destaque para a Pressão Máxima, que apresentou correlação significativa com o TUG (p<0,005). Entretanto, a ADM articular de quadril, joelho e tornozelo não apresentaram correlações significativas entre as variáveis baropodométricas e risco de quedas. Sobre a análise da associação entre o TUG, categorizado em baixo e médio risco de quedas, e as quedas, não foram observadas diferenças (p=0,475). O aumento da pressão máxima apresentou relação com o risco de quedas, mas a ADM de quadril, joelho e tornozelo não apresentaram relação sobre o risco de quedas e as variáveis baropodométricas na população investigada.

Impacto do treinamento sensório-motor com plataforma vibratória no equilíbrio e na mobilidade funcional de um indivíduo idoso com sequela de acidente vascular encefálico: relato de caso

RESUMO A incidência de acidente vascular encefálico (AVE) aumenta com o envelhecimento e pode ter como consequência alterações sensitivas e motoras, as quais limitam a capacidade funcional, em função da redução do equilíbrio e da mobilidade. Diferentes recursos vêm sendo utilizados na prática fisioterapêutica para a recuperação do equilíbrio e da mobilidade, como treinamento sensório-motor e treinamento com plataforma vibratória. O objetivo deste estudo foi investigar o efeito de um protocolo de treinamento sensório-motor com plataforma vibratória no equilíbrio e na mobilidade funcional de um indivíduo idoso com sequela de AVE. Um indivíduo idoso, do gênero feminino, com 72 anos de idade e com sequela de AVE participou deste estudo. A avaliação do equilíbrio foi realizada por meio da Escala de Equilíbrio de Berg (EEB) e a avaliação da mobilidade por meio do teste Timed Up and Go (TUG). As variáveis dependentes para acompanhamento foram: pontuação obtida na EEB e tempo de execução do TUG. Após a avaliação inicial, a idosa realizou um protocolo de treinamento sensório-motor com plataforma vibratória, composto por 10 sessões, de 45 minutos cada. Na avaliação final, os resultados indicaram um aumento da pontuação na EEB (avaliação inicial = 41 pontos e avaliação final = 51 pontos) e uma redução no tempo de execução do TUG (avaliação inicial = 14 segundos e avaliação final = 9 segundos) na idosa com sequela de AVE. Com base nesses resultados, é possível concluir que o treinamento proposto foi efetivo para a melhora do equilíbrio e da mobilidade funcional da idosa com sequela de AVE.

Quedas: conceitos, frequências e aplicações à assistência ao idoso. Revisão da literatura

Realizou-se revisão da literatura sobre quedas em idosos de comunidade, identificando prevalência, fatores de risco e consequências associadas ao cair, bem como triagem, avaliação e medidas preventivas às quedas na velhice. Foram selecionadas publicações indexadas nas bases de dados Medical Literature Analysis e Retrieval System Online (MEDLINE), por meio do PubMed; Literatura Latino-americana e do Caribe em Ciências da Saúde (LILACS) e Scientific Electronic Library Online (SciELO), relativas ao período de 2008 a 2012, sendo analisadas 41 referências. As evidências levantadas neste estudo destacam as quedas como condição de grande complexidade e que impõe grande desafio para idosos e profissionais da saúde. Ressalta-se a importância da identificação e do manejo dos fatores determinantes e das consequências associadas ao cair, juntamente com o delineamento de estratégias preventivas multifatoriais frente aos idosos vulneráveis ao cair e entre os idosos com história de quedas recorrentes.

Mobilidade funcional em idosos institucionalizados e não institucionalizados

INTRODUÇÃO: Quedas são importante causa de morbidade e mortalidade na terceira idade, com consequências que vão desde pequenas lesões até a morte. A medida da mobilidade funcional pode ser usada para predizer o risco de quedas e para mensurar o resultado de intervenções que busquem reduzi-lo. OBJETIVOS: Avaliar e comparar uma medida de mobilidade funcional em idosos residentes na comunidade e em uma instituição de longa permanência para idosos (ILPI), e verificar sua relação com idade e sexo nos diferentes locais de moradia. MATERIAIS e MÉTODOS: Participaram deste estudo observacional, analítico e transversal, 413 idosos, sendo 72 institucionalizados (80,9 ± 8,1anos; 53 mulheres) e 341 da comunidade (69,8 ± 7,5 anos; 269 mulheres). Para avaliar o grau de mobilidade funcional, foi utilizado o teste do levantar e caminhar cronometrados (TUG). RESULTADOS: Não foi detectada diferença estatística entre as médias do TUG apresentadas pelos sexos, tanto na comunidade (p>0,05), quanto na ILPI (p>0,05). Homens e mulheres residentes na ILPI apresentaram média de TUG significativamente maior que homens e mulheres da comunidade (p<0,01). Foi detectada diferença significativa entre as médias de TUG, quando comparadas em termos de faixa etária (p=0,003). CONCLUSÃO: A mobilidade funcional é maior entre os idosos que residem na comunidade, os quais, portanto, apresentam menor risco de quedas. Homens e mulheres apresentam nível semelhante de desempenho na mobilidade funcional, a qual decresce com a idade, em todas as faixas etárias. Sugerem-se intervenções que auxiliem ambos os grupos a melhorarem sua mobilidade e, portanto, a diminuir o risco de quedas.