老年医学与衰弱老年人的医疗服务

目的 随着年龄的增长.人们发生多种健康问题的可能性增大.这些问题可被称作健康缺陷.健康缺陷越多.越容易引发健康方面的不良后果,例如健康状况恶化,甚至死亡.所渭衰弱,是指能够增加不良健康后果的危险的身体状态.健康缺陷度越高,身体衰弱度就越大.在临床上,通过临床衰弱量表-09的使用,可以对衰弱度进行逐级描述(此量表是加拿大健康与衰老研究课题所设计使用的临床衰弱量表的修订版).衰弱导致了健康问题的复杂化.由于老年人的健康问题较为复杂,而临床服务一般只侧重于诊治单一的问题,造成对老年患者的服务不够全面.老年专科医生应该是能够综合处理复杂问题的专家,应擅长诊治并存多种健康问题的老年患者.充分了解和认真研究健康需求的复杂性问题,老年专科医生才能最有效地帮助那些身体衰弱的老年患者.模式识别就是对付老年疾病复杂性的一种重要手段,它借助于老年综合性评估和对实际发病的衰弱老年人所表现出的症状特征的识别而加以实现.     

Assessing biological aging: the origin of deficit accumulation

The health of individuals is highly heterogeneous, as is the rate at which they age. To account for such heterogeneity, we have suggested that an individual’s health status can be represented by the number of health deficits (broadly defined by biological and clinical characteristics) that they accumulate. This allows health to be expressed in a single number: the frailty index (FI) is the ratio of the deficits present in a person to the total number of deficits considered (e.g. in a given database or experimental procedure). Changes in the FI characterize the rate of individual aging. The behavior of the FI is highly characteristic: it shows an age specific, nonlinear increase, (similar to Gompertz law), higher values in females, strong associations with adverse outcomes (e.g., mortality), and a universal limit to its increase (at FI ~0.7). These features have been demonstrated in dozens of studies. Even so, little is known about the origin of deficit accumulation. Here, we apply a stochastic dynamics framework to illustrate that the average number of deficits present in an individual is the product of the average intensity of the environmental stresses and the average recovery time. The age-associated increase in recovery time results in the accumulation of deficits. This not only explains why the number of deficits can be used to estimate individual differences in aging rates, but also suggests that targeting the recovery rate (e.g. by preventive or therapeutic interventions) will decrease the number of deficits that individuals accumulate and thereby benefit life expectancy.     

Orthostatic hypotension (OH) and mortality in relation to age, blood pressure and frailty

Systolic hypertension and OH, as with many other deficits, accumulate with age. This deficit accumulation results in frailty: enhanced vulnerability to adverse outcomes. This study evaluated OH in relation to age, frailty, systolic hypertension, and mortality. In the population-based Canadian Study of Health and Aging second clinical examination, complete data were available on 1347 people, mean age=83.3 (SD=6.4)years. A frailty index (FI) was calculated from a 52-item Comprehensive Geriatric Assessment (CGA), yielding an FI-CGA from 0 (no deficits) to 1.0 (52 deficits). The mean change in blood pressure from lying to standing was 7.3±15.6 mmHg (range +94 to -60). In total, 239 people (17.7%) had OH (change >20 mmHg systolic or >10 mmHg diastolic). Mean systolic blood pressure was higher (155.8±23.3 mmHg) in people with OH than in those without (141.4±23 mmHg), as was the FI-CGA (0.18 vs. 0.16). OH increased with frailty and systolic hypertension, but not age. Unadjusted, OH was associated with an increased risk of death (relative risk=1.21, 95% confidence interval 1.19-1.23). Adjusted for frailty, this result was not significant. OH may be a marker of the system dysregulation seen in frailty, but as a state variable is a less powerful marker of vulnerability than is the FI-CGA.     

Measuring frailty in Dutch community-dwelling older people: Reference values of the Tilburg Frailty Indicator (TFI)

ObjectivesThe objectives of this study were to provide reference values of the Tilburg Frailty Indicator (TFI) for community-dwelling older people by age, sex, marital status, ethnicity, education, income, and residence, and examine the effects of these seven socio-demographic variables on frailty.Methods47,768 individuals aged 65 years and older living in the Netherlands completed a health questionnaire (58.5% response rate), including the TFI. The TFI is a self-report questionnaire for measuring frailty, developed from an integral approach of frailty, including physical, psychological, and social domains.ResultsReference values were provided for men and women separately, as a function of age. We found associations of all socio-demographic variables with frailty, also after controlling for the effects of age. These associations held for both sexes and for big cities as wells as more rural areas. For instance, the effect of age was large for total and physical frailty, women were more frail than men, and some very large average frailty differences between the ethnic groups were found, with autochthon people having the lowest frailty score.ConclusionsIn conclusion, this study offers reference values of the TFI by socio-demographic characteristics and explains frailty using these characteristics. This information will support researchers, policymakers and health care professionals in interpreting scores of the TFI, which may guide their efforts to reduce frailty and its adverse outcomes.     

Significance of frailty for predicting adverse clinical outcomes in different patient groups with specific medical conditions

Frailty is a major health burden in an aging society. It constitutes a clinical state of reduced physiological reserves that is associated with a diminished ability to withstand internal and external stressors. Frail patients have an increased risk for adverse clinical outcomes, such as mortality, readmission to hospital, institutionalization and falls. Of further clinical interest, frailty might be at least in part reversible in some patients and subject to preventive strategies. In daily clinical practice older patients with a complex health status, who are mostly frail or at least at risk of developing frailty, are frequently cared for by geriatricians. Recently, clinicians and scientists from other medical disciplines, such as cardiology, pulmonology, gastroenterology, nephrology, endocrinology, rheumatology, surgery and critical care medicine also discovered frailty to be an interesting instrument for risk stratification of patients, including younger patients. In this review we highlight the results of recent studies that demonstrated the significance of frailty to predict adverse clinical outcomes in patients with specific medical conditions, such as cardiac, lung, liver and kidney diseases as well as diabetes mellitus, osteoarthritis, trauma patients, patients undergoing surgery and critically ill patients. Multiple studies in patients with the aforementioned specific medical conditions could be identified demonstrating a predictive role of frailty for several adverse clinical outcomes. The association between frailty and adverse clinical outcomes reported in these studies was in part independent of several major potential confounder factors, such as age, sex, race, comorbidities and disabilities and were also detected in younger patients.     

Accelerated accumulation of health deficits as a characteristic of aging

Cross-sectional analyses show that an index of aging-associated health/well-being deficits, called the "frailty index", can characterize the aging process in humans. This study provides support for such characterization from a longitudinal analysis of the frailty index properties. The data are from the National Long Term Care Survey assessed longitudinally health and functioning of the U.S. elderly in the period 1982-1999. In cross-sectional analysis, the frailty index exhibits accelerated increase with age till oldest-old ages (95+), with possible deceleration thereafter. Longitudinal analysis confirms the accelerated accumulation of deficits in aging individuals. The time-dynamics of the frailty index is affected by two sex-sensitive processes: (i) selection of robust individuals, resulting in a decline of the mean frailty index with age and (ii) accumulation of deficits associated with physiological aging and its interaction with environment, which results in an accelerated increase of individual frailty index prior to death irrespective of chronological age. Current frailty index levels in individuals are more predictive of death than the index past values. Longitudinal analysis provides strong evidence that the cumulative index of health/well-being deficits can characterize aging-associated processes in humans and predict death better than chronological age during short-term periods.     

衰弱状态对老年患者围术期不良事件影响的研究进展

在社会老龄化趋势不断加速的背景下,老年人口的外科手术比例也持续上升。尽管手术、麻醉技术和围术期医学在不断进步,老年手术患者仍在遭受不良术后结局的困扰。衰弱指老年人多系统生理储备下降,外界轻微的伤害性刺激便可引起生理机能快速而剧烈的变化,是术后不良事件发生的一个重要的风险因素。本文回顾了近年来衰弱与围术期不良事件联系的相关文献,拟就衰弱的概念、衰弱的评估工具、衰弱对围术期结局的影响以及衰弱患者围术期优化策略进行综述,以期为临床优化衰弱老年患者的身体机能,避免围术期不良结局提供理论支持。     

Frailty in cardiovascular disease: Screening tools

Cardiovascular disease (CVD) is the leading cause of death in developed countries and disproportionately affects older adults. Frailty is a complex clinical syndrome with multiple causes and contributing factors in which there is increased vulnerability when exposed to a minor stressor and increased risk for adverse outcomes, such as disability, hospitalization and mortality. Frailty is an important prognostic factor in patients with CVD, and so identifying this feature when assessing these patients may help to individually tailor cardiovascular treatment. The first step is to identify frailty. Several tools have been validated as screening methods for frailty. However, they diverge with regard to complexity, nature, feasibility and the outcome they can predict. The aim of this review is to describe the available screening tools for frailty and to examine their usefulness in patients with CVD.     

Effects of social isolation,loneliness and frailty on health outcomes and their possible mediators and moderators in community-dwelling older adults: A scoping review

Background/ObjectivesOver the past decade, the quantity and quality of social relationships in later life have become one of the main challenges facing an aging society. Our aims were to map and synthesize the literature addressing the effects of loneliness, three aspects of social isolation, including social networks, social support, and social participation, and frailty on health outcomes and their mediators and moderators among older adults.MethodsWe conducted a scoping review and searched for articles published in English and French from 2001 up to 2019 in the following databases: Medline, Embase, CINAHL Plus, Scopus, Web of Science and PsycINFO.ResultsOur database search initially resulted in 4001 articles of which 1832 were excluded; 26 were eligible. Most of the included studies revealed associations between social isolation, loneliness and frailty. The majority of studies found evidence of associations between frailty and their adverse outcomes; however, only few studies found a relationship between social isolation and health outcomes. In spite of the established link between frailty and adverse outcomes, no study looked at how social isolation and loneliness can alter adverse outcomes of frailty. No study investigated the role of frailty or social isolation and loneliness as a mediator on the pathway related to health.ConclusionsEvidence is limited in examining the role of frailty or social isolation and loneliness as a moderator and mediator. Longitudinal research combining both social isolation and loneliness are warranted to explore whether social isolation or loneliness has more deleterious effects on frailty and health outcomes.     

Resources as a protective factor for negative outcomes of frailty in elderly people

Background: Although frailty is often conceptualized in terms of deficits, the level of frailty can be perceived as a complex interplay between deficits and resources. Objective: We studied whether resources such as educational level, financial situation, and living-alone status moderate the negative effects of deficits on two potentially adverse consequences of frailty: self-perceived health and receiving professional care. Methods: Logistic regression analysis was performed with data from a cross-sectional survey, designed by the public health service in the south of the Netherlands. The questionnaire was completed by a representative sample of people aged 70 and over (n = 5,559). Interaction effects between deficits (multimorbidity, difficulty performing ADLs, psychological distress, loneliness) and resources (educational level, financial situation, living-alone status) were studied in relation to self-perceived health and receiving professional care. Results: We found that in males the effect of difficulty in performing ADLs on self-perceived health was modified by educational level (p < 0.05, indicating that difficulty in performing ADLs is more strongly related to moderate/bad self-perceived health for those with higher education). In females, the effect of psychological distress on self-perceived health was modified by educational level (p < 0.05, indicating that suffering from psychological distress is more strongly related to moderate/bad self-perceived health for those with higher education) and the effect of difficulty in performing ADLs on receiving professional care was modified by living-alone status (p < 0.05, indicating that difficulty in performing ADLs was more strongly related to receiving professional care for those women who lived alone). Conclusions: Resources moderate the impact of personal deficits on self-perceived health and receiving professional care. Some frail people seem to be more vulnerable as they lack resources such as a high level of education. This should be taken into account in deciding when elderly people are at risk of negative outcomes of frailty and is therefore important for health professionals and policy-makers.     

2型糖尿病合并衰弱和肌少症的机制与治疗

中国人群2型糖尿病总体患病率约9.1%。与正常人相比,60岁时确诊2型糖尿病的患者,其预期寿命减少7.3~9.5年,维持良好生命质量的时间减少11.1~13.8年。对于老年糖尿病患者,保持良好的功能状态至关重要。衰弱是一种常见的老年综合征,是影响老年人功能状态的重要因素,是老年人残疾、死亡和住院等不良健康结局的强预测因子,也是老年糖尿病患者发生不良健康结局的预测因子。本文就衰弱/肌少症与2型糖尿病之间的内在联系、衰弱/肌少症合并糖尿病的管理与治疗作进一步阐述。     

Frailty in NHANES: Comparing the frailty index and phenotype

The two most commonly employed frailty measures are the frailty phenotype and the frailty index. We compared them to examine whether they demonstrated common characteristics of frailty scales, and to examine their association with adverse health measures including disability, self-reported health, and healthcare utilization. The study examined adults aged 50+ (n = 4096) from a sequential, cross-sectional sample (2003–2004; 2005–2006), National Health and Nutrition Examination Survey. The frailty phenotype was modified from a previously adapted version and a 46-item frailty index was created following a standard protocol. Both measures demonstrated a right-skewed distribution, higher levels of frailty in women, exponential increase with age and associations with high healthcare utilization and poor self-reported health. More people classified as frail by the modified phenotype had ADL disability (97.8%) compared with the frailty index (56.6%) and similarly for IADL disability (95% vs. 85.6%). The prevalence of frailty was 3.6% using the modified frailty phenotype and 34% using the frailty index. Frailty index scores in those who were classified as robust by the modified phenotype were still significantly associated with poor self-reported health and high healthcare utilization. The frailty index and the modified frailty phenotype each confirmed previously established characteristics of frailty scales. The agreement between frailty and disability was high with each measure, suggesting that frailty is not simply a pre-disability stage. Overall, the frailty index classified more people as frail, and suggested that it may have the ability to discriminate better at the lower to middle end of the frailty continuum.     

Development of frailty measurement tools using administrative health data: A systematic review

ObjectivesFrailty is an increasingly common health condition and is seen more often due to the ageing population. This study reviews the evidence on the development and validation of these automated frailty measurement tools.DesignSix databases: PubMed, EMBASE, MEDLINE, CINAHL, Scopus, and Web of Science were electronically searched. Selected studies must have developed and validated a new frailty measurement tool using administrative health data and published results in a peer-reviewed, English-language journal. Selected studies were synthesized narratively.Setting and participantsThe review focused on large scale studies using administrative health data in developed countries. Participants included older people aged 65 years and above.MeasuresThe main measures of review studies include discrimination power and the prediction ability of adverse health outcomes; performance against established frailty measures; and validation records.ResultsFive studies were selected for narrative synthesis after screening the full-text. All frailty measurement tools in the selected five studies produced strong discrimination power with C-statistics ranging from 0.61−97. Two studies were independently validated in studies by other authors or conducted in other locations; one study developed an early prediction model, and no study has been applied in practice.Conclusions and implicationsAutomated frailty measurement tools using administrative health data are still in the early development stage with five tools developed since 2016. Selected studies have strong prediction of adverse health outcomes. Future studies should include validation and refinement of these tools in other countries and assessment of their clinical utility and capacity to inform cost-effective policy and practice.     

Prevalence and 10‐Year Outcomes of Frailty in Older Adults in Relation to Deficit Accumulation

OBJECTIVES: To evaluate the prevalence and 10‐year outcomes of frailty in older adults in relation to deficit accumulation. DESIGN: Prospective cohort study. SETTING: The National Population Health Survey of Canada, with frailty estimated at baseline (1994/95) and mortality follow‐up to 2004/05. PARTICIPANTS: Community‐dwelling older adults (N=2,740, 60.8% women) aged 65 to 102 from 10 Canadian provinces. During the 10‐year follow‐up, 1,208 died. MEASUREMENTS: Self‐reported health information was used to construct a frailty index (Frailty Index) as a proportion of deficits accumulated in individuals. The main outcome measure was mortality. RESULTS: The prevalence of frailty increased with age in men and women (correlation coefficient=0.955–0.994, P<.001). The Frailty Index estimated that 622 (22.7%, 95% confidence interval (CI)=21.0–24.4%) of the sample was frail. Frailty was more common in women (25.3%, 95% CI=23.2–27.5%) than in men (18.6%, 95% CI=15.9–21.3%). For those aged 85 and older, the Frailty Index identified 39.1% (95% CI=31.3–46.9%) of men as frail, compared with 45.1% (95% CI=39.7–50.5%) of women. Frailty significantly increased the risk of death, with an age‐ and sex‐adjusted hazard ratio for the Frailty Index of 1.57 (95% CI=1.41–1.74). CONCLUSION: The prevalence of frailty increases with age and at any age lessens survival. The Frailty Index approach readily identifies frail people at risk of death, presumably because of its use of multiple health deficits in multidimensional domains.     

The estimation of relative fitness and frailty in community-dwelling older adults using self-report data

BACKGROUND: While on average health declines with age, it also becomes more variable with age. As a consequence of this marked variability, it becomes more important as people age to have a means of summarizing health status, but how precisely to do so remains controversial. We developed one measure of health status, personal biological age, from a frailty index. The index itself is a count of deficits derived, in the first instance, from a clinical database. In our earlier investigations, personal biological age demonstrated a strong relationship with 6-year survival. Here we extend this approach to self-reported data. METHODS: This is a secondary analysis of community-dwelling people aged 65 years and older (n = 9008) in the Canadian Study of Health and Aging. The frailty index was calculated from 40 self-reported variables, representing symptoms, attitudes, illnesses, and function. Personal biological age was estimated for each individual as the age corresponding to the mean chronological age for the index value. Individual frailty (and the related construct of fitness) was calculated as the difference between chronological and personal biological age. RESULTS: The frailty index showed, on average, an exponential increase with age at an average rate of 3% per year. Although women, on average, demonstrate more frailty than men of the same chronological age, their survival chances are greater. The frailty index strongly correlated (Pearson r =.992 for women and.955 for men) with survival. CONCLUSIONS: A frailty index, based on self-report data, can be used as a tool for capturing heterogeneity in the health status of older adults.     

Musculoskeletal health,frailty and functional decline

Frailty in older people is associated with a vulnerability to adverse events. While ageing is associated with a loss of physiological reserves, identifying those with the syndrome of frailty has the potential to assist clinicians to tailor treatments to those at the risk of future decline into disability with an increased risk of complications, morbidity and mortality. Sarcopenia is a key component of the frailty syndrome and on its own puts older people at risk of fragility fractures; however, the clinical syndrome of frailty affects the musculoskeletal and non-musculoskeletal systems. Hip fractures are becoming a prototype condition in the study of frailty. Following a hip fracture, many of the interventions are focused on limiting mobility disability and restoring independence with activities of daily living, but there are multiple factors to be addressed including osteoporosis, sarcopenia, delirium and weight loss. Established techniques of geriatric evaluation and management allow systematic assessment and intervention on multiple components by multidisciplinary teams and deliver the best outcomes. Using the concept of frailty to identify older people with musculoskeletal problems as being at the risk of a poor outcome assists in treatment planning and is likely to become more important as effective pharmacological treatments for sarcopenia emerge.This review will focus on the concept of frailty and its relationship with functional decline, as well as describing its causes, prevalence, risk factors, potential clinical applications and treatment strategies.     

Relative fitness and frailty of elderly men and women in developed countries and their relationship with mortality

OBJECTIVES: To investigate the relationship between accumulated health-related problems (deficits), which define a frailty index in older adults, and mortality in population-based and clinical/institutional-based samples. DESIGN: Cross-sectional and cohort studies. SETTING: Seven population-based and four clinical/institutional surveys in four developed countries. PARTICIPANTS: Thirty-six thousand four hundred twenty-four people (58.5% women) aged 65 and older. MEASUREMENTS: A frailty index was constructed as a proportion of all potential deficits (symptoms, signs, laboratory abnormalities, disabilities) expressed in a given individual. Relative frailty is defined as a proportion of deficits greater than average for age. Measures of deficits differed across the countries but included common elements. RESULTS: In each country, community-dwelling elderly people accumulated deficits at about 3% per year. By contrast, people from clinical/institutional samples showed no relationship between frailty and age. Relative fitness/frailty in both sexes was highly correlated (correlation coefficient >0.95, P<.001) with mortality, although women, at any given age, were frailer and had lower mortality. On average, each unit increase in deficits increased by 4% the hazard rate for mortality (95% confidence interval=0.02-0.06). CONCLUSION: Relative fitness and frailty can be defined in relation to deficit accumulation. In population studies from developed countries, deficit accumulation is robustly associated with mortality and with age. In samples (e.g., clinical/institutional) in which most people are frail, there is no relationship with age, suggesting that there are maximal values of deficit accumulation beyond which survival is unlikely.     

Improvement and decline in health status from late middle age: modeling age-related changes in deficit accumulation

In a prospective multi-panel cohort study, we investigated how, from late middle age, individuals' health status improves or declines. In the Canadian National Population Health Survey, transition probabilities between different health states were estimated for 4330 people (58.8% women) aged 55+ at baseline over 2-year intervals from 1994 to 2000. Health status was defined by a deficit count, using 33 health-related variables combined in a frailty index. For each time interval, the chance of accumulating deficits increased linearly with the number of deficits. Older survivors (aged 70-85) showed a slightly lower chance of stability or improvement (52%; 95% confidence interval 50-54%) compared with those in late middle age (56%; 54-58%). Changes in health states can be described with high accuracy (R2=0.92) by a modified Poisson distribution, using four parameters: the background odds of accumulating additional deficits, the chance of incurring more or fewer deficits, given the existing number, and the corresponding probabilities of dying. An age-invariant limit to deficit accumulation was observed at 22 deficits. From late middle age, transitions in health states occur with a regularity that is easily modeled. Improvements in health can occur at any age. At all ages, there is a limit to deficit accumulation.     

Increased healthcare costs associated with frailty among community-dwelling older people: A systematic review and meta-analysis

BackgroundAlthough frailty of older people has been shown to be associated with numerous adverse health outcomes, evidence on healthcare costs associated with frailty is scarce.MethodsMedline, Embase, PsycINFO, and AMED were electronically searched in January 2019 based on a protocol in accordance with the PRISMA statement using Medical Subjective Heading and free text terms, with explosion functions. Language restriction was not applied. Studies were considered if they were published between 2000 to January 2019 and provided healthcare costs stratified by the frailty status categories among community-dwelling older people with a mean age of 60 years or higher. Reference lists of the included studies were reviewed for additional studies. Healthcare costs according to frailty status were compared using standardized mean difference random-effects meta-analysis.ResultsThe systematic review found 3116 citations. After screening for title, abstract, and full-text for eligibility, 5 studies involving 3742362 participants were included. Healthcare costs were compared across three frailty status, robust, prefrailty, and frailty. Both prefrailty (5 studies, Hedges’ g = 0.24, 95% confidence interval (CI) = 0.15-0.33, p < 0.001) and frailty (5 studies, Hedges’ g = 0.62, 95%CI = 0.61-0.62, p < 0.001) were associated with significantly higher healthcare costs when compared with robustness. There was a high degree of heterogeneity. The risk of publication bias was considered to be low in funnel plots.ConclusionsThis systematic review and meta-analysis found a dose-response increase in the healthcare costs associated with frailty among community-dwelling older adults. Future research should recognize frailty as an important factor associated with increased healthcare costs.     

Frailty and survival of older Chinese adults in urban and rural areas: results from the Beijing Longitudinal Study of Aging

Differences in frailty between rural and urban older adults have been demonstrated in developed countries. It is not understood how the apparently greater differences in living conditions between different types of regions in China may affect health and outcomes of older Chinese adults. Here, a frailty index (FI) based on the accumulation of health deficits was used to investigate health and survival differences in older Chinese men and women. We studied rural (n = 1121) and urban (n = 2136) older adults (55-97 years old) in the Beijing Longitudinal Study of Aging (BLSA), of whom 48.9% (rural) and 35.4% (urban) died over 8 years of follow-up. The FI was generated from 35 self-reported health deficits. The mean FI increased exponentially with age (r² = 0.87) and was higher in women than in men. The death rate increased significantly with increases in the FI, but women showed a lower death rate than did men. The mean FI in urban older adults (0.12 ± 0.10) was lower than that in their rural counterparts (0.14 ± 0.12, p < 0.001). Urban dwellers showed better survival compared with their counterparts in the rural areas. Adjusted by age, sex, and education level, the hazard ratio for death for each increment of the FI was 1.28 for urban people and 1.27 for rural people. Chinese urban dwellers showed better health and survival than rural dwelling older adults. The FI readily summarized health and mortality differences among different geographic regions, reflecting the impact of the environment, socioeconomics, and medical services on deficit accumulation and on survival.