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Background Intensive systolic blood pressure treatment (<120 mm Hg) in SPRINT (Systolic Blood Pressure Intervention Trial) improved survival compared with standard treatment (<140 mm Hg) over a median follow-up of 3.3 years. We projected life expectancy after observed follow-up in SPRINT using SPRINT-eligible participants in the NHLBI-PCS (National Heart, Lung, and Blood Institute Pooled Cohorts Study). Methods and Results We used propensity scores to weight SPRINT-eligible NHLBI-PCS participants to resemble SPRINT participants. In SPRINT participants, we estimated in-trial survival (<4 years) using a time-based flexible parametric survival model. In SPRINT-eligible NHLBI-PCS participants, we estimated posttrial survival (≥4 years) using an age-based flexible parametric survival model and applied the formula to SPRINT participants to predict posttrial survival. We projected overall life expectancy for each SPRINT participant and compared it to parametric regression (eg, Gompertz) projections based on SPRINT data alone. We included 8584 SPRINT and 10 593 SPRINT-eligible NHLBI-PCS participants. After propensity weighting, mean (SD) age was 67.9 (9.4) and 68.2 (8.8) years, and 35.5% and 37.6% were women in SPRINT and NHLBI-PCS, respectively. Using the NHLBI-PCS-based method, projected mean life expectancy from randomization was 21.0 (7.4) years with intensive and 19.1 (7.2) years with standard treatment. Using the Gompertz regression, life expectancy was 11.2 (2.3) years with intensive and 10.5 (2.2) years with standard treatment. Conclusions Combining SPRINT and NHLBI-PCS observed data likely offers a more realistic estimate of life expectancy than parametrically extrapolating SPRINT data alone. These results offer insight into the potential long-term effectiveness of intensive SBP goals.

Asunto(s)

Antihipertensivos/uso terapéutico , Presión Sanguínea/fisiología , Ensayos Clínicos como Asunto , Predicción , Hipertensión/tratamiento farmacológico , Anciano , Femenino , Estudios de Seguimiento , Humanos , Hipertensión/mortalidad , Hipertensión/fisiopatología , Masculino , Puntaje de Propensión , Factores de Riesgo , Tasa de Supervivencia/tendencias , Sístole , Estados Unidos/epidemiología

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INTRODUCTION: Both high or low plasma amyloid levels have been associated with risk of dementia in nondemented subjects. METHODS: We examined baseline plasma ß-amyloid (Aß) levels in relationship to incident dementia during a period of 8.5 years in 2840 subjects age >75 years; 2381 were cognitively normal (CN) and 450 mild cognitive impairment. RESULTS: Increased plasma Aß1-40 and Aß1-42 levels were associated with gender (women), age, low education, creatinine levels, history of stroke, and hypertension. CN participants who developed dementia had lower levels of Aß1-42 and Aß1-42/Aß1-40 ratio compared with those who did not. Aß levels did not predict dementia in mild cognitive impairment participants. DISCUSSION: There was an inverse association between Aß1-42 and Aß1-42/Aß1-40 ratio to risk of dementia in CN participants. Cerebral and cardiovascular disease and renal function are important determinants of increased Aß levels and must be considered in evaluations of relationship of plasma Aß and subsequent risk of dementia.

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Péptidos beta-Amiloides/sangre , Biomarcadores/sangre , Demencia/sangre , Anciano , Anciano de 80 o más Años , Demencia/epidemiología , Demencia/prevención & control , Femenino , Ginkgo biloba , Humanos , Incidencia , Estudios Longitudinales , Masculino , Memoria/efectos de los fármacos , Extractos Vegetales/uso terapéutico

RESUMEN

BACKGROUND: Blood pressure (BP) and cholesterol are major modifiable risk factors for cardiovascular disease (CVD), but effects of exposures during young adulthood on later life CVD risk have not been well quantified. OBJECTIVE: The authors sought to evaluate the independent associations between young adult exposures to risk factors and later life CVD risk, accounting for later life exposures. METHODS: The authors pooled data from 6 U.S. cohorts with observations spanning the life course from young adulthood to later life, and imputed risk factor trajectories for low-density lipoprotein (LDL) and high-density lipoprotein cholesterols, systolic and diastolic BP starting from age 18 years for every participant. Time-weighted average exposures to each risk factor during young (age 18 to 39 years) and later adulthood (age ≥40 years) were calculated and linked to subsequent risks of coronary heart disease (CHD), heart failure (HF), or stroke. RESULTS: A total of 36,030 participants were included. During a median follow-up of 17 years, there were 4,570 CHD, 5,119 HF, and 2,862 stroke events. When young and later adult risk factors were considered jointly in the model, young adult LDL ≥100 mg/dl (compared with <100 mg/dl) was associated with a 64% increased risk for CHD, independent of later adult exposures. Similarly, young adult SBP ≥130 mm Hg (compared with <120 mm Hg) was associated with a 37% increased risk for HF, and young adult DBP ≥80 mm Hg (compared with <80 mm Hg) was associated with a 21% increased risk. CONCLUSIONS: Cumulative young adult exposures to elevated systolic BP, diastolic BP and LDL were associated with increased CVD risks in later life, independent of later adult exposures.

Asunto(s)

Presión Sanguínea , Enfermedades Cardiovasculares/epidemiología , HDL-Colesterol/sangre , LDL-Colesterol/sangre , Adolescente , Adulto , Factores de Edad , Anciano , Anciano de 80 o más Años , Niño , Preescolar , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Factores de Riesgo , Adulto Joven

RESUMEN

OBJECTIVES: To understand which causes of death are higher in black than white community-dwelling older adults and determine whether differences in baseline risk factors explain racial differences in mortality. DESIGN: Longitudinal cohort study (Health, Aging, and Body Composition Study). SETTING: Pittsburgh, Pennsylvania; and Memphis, Tennessee. PARTICIPANTS: Black and white men and women aged 70 to 79 during recruitment (N=3,075; 48% men, 42% black) followed for a median of 13 years. MEASUREMENTS: A committee of physicians adjudicated cause of death, which was categorized as cardiovascular disease (CVD), stroke, cancer, dementia, pulmonary, infection, kidney, or other causes. Using competing risks regression, we examined whether known risk factors at baseline (demographic characteristics, smoking, body mass index, chronic diseases, physical function, cognition) could explain racial differences in cause-specific mortality risk. RESULTS: During follow-up, 1,991 (65%) participants died. Black participants died at higher rates from cancer (hazard ratio (HR)=1.36, 95% confidence interval (CI)=1.14-1.63), kidney disease (HR=2.09, 95% CI=1.16-3.74), stroke (HR=1.31, 95% CI=0.98-1.76); and CVD (HR=1.16, 95% CI=0.98-1.37). Poorer physical and cognitive performance at baseline among black participants explained most of the racial difference in risks of dying from kidney disease, stroke, and CVD but not cancer. When examining types of cancer deaths, black participants died at higher rates from multiple myeloma, pancreatic cancer, and prostate cancer, which baseline risk factors did not explain either. CONCLUSION: Factors contributing to poorer physical and cognitive performance in similarly aged black men and women could be targets to reduce excess mortality from CVD, stroke, and kidney disease. More work is needed to identify factors contributing to cancer mortality disparities.

Asunto(s)

Negro o Afroamericano/estadística & datos numéricos , Causas de Muerte , Vida Independiente/estadística & datos numéricos , Mortalidad/etnología , Población Blanca/estadística & datos numéricos , Anciano , Anciano de 80 o más Años , Enfermedades Cardiovasculares/etnología , Enfermedades Cardiovasculares/mortalidad , Demencia/etnología , Demencia/mortalidad , Femenino , Humanos , Enfermedades Renales/etnología , Enfermedades Renales/mortalidad , Estudios Longitudinales , Enfermedades Pulmonares/etnología , Enfermedades Pulmonares/mortalidad , Masculino , Neoplasias/etnología , Neoplasias/mortalidad , Pennsylvania/epidemiología , Modelos de Riesgos Proporcionales , Análisis de Regresión , Factores de Riesgo , Accidente Cerebrovascular/etnología , Accidente Cerebrovascular/mortalidad , Tennessee/epidemiología

RESUMEN

OBJECTIVES: There is a consensus that social connectedness is integral for a long, healthy life. However, studies of social support and survival have primarily relied on baseline social support measures, potentially missing the effects of fluctuations of perceived support over time. This is especially important for older adults who experience increased changes in disability. This study examined whether among older adults time-varying perceived social support was associated with time to death (main effect model of support) and whether time-varying disability was a modifier (stress-buffering model of support). Gender and marital status were also examined as modifiers. METHODS: Older adults in the Cardiovascular Health Study (N = 5,201) completed self- report measures of demographics and psychological health and clinical risk factors for mortality at baseline (1989-1990). Perceived social support and disability were measured from baseline through Wave 11 (1998-1999). Cox regression of time to death with time-varying covariates was performed. RESULTS: Time-varying as well as baseline-only perceived social support was associated with greater survival in the unadjusted models but not after adjustment. Gender, marital status, and time-varying disability were not significant modifiers. CONCLUSIONS: In contrast with the previously reported association between baseline individual differences in perceived social support and time to death, older adults' baseline-only and fluctuating perceptions of perceived support over time were not associated with time to death after adjustment for other clinical physical and psychological risk factors. Research is needed to identify other relationship factors that may be more informative as time-varying predictors of health and longevity in large longitudinal data sets. (PsycINFO Database Record (c) 2018 APA, all rights reserved).

Asunto(s)

Enfermedades Cardiovasculares/mortalidad , Estado de Salud , Apoyo Social , Anciano , Anciano de 80 o más Años , Muerte , Femenino , Humanos , Masculino , Salud Mental , Modelos Teóricos , Percepción , Factores de Riesgo , Autoinforme , Factores de Tiempo

RESUMEN

BACKGROUND: In the primary analysis of the Aspirin in Reducing Events in the Elderly (ASPREE) trial, now published in the Journal, we report that the daily use of aspirin did not provide a benefit with regard to the primary end point of disability-free survival among older adults. A numerically higher rate of the secondary end point of death from any cause was observed with aspirin than with placebo. METHODS: From 2010 through 2014, we enrolled community-dwelling persons in Australia and the United States who were 70 years of age or older (or ≥65 years of age among blacks and Hispanics in the United States) and did not have cardiovascular disease, dementia, or disability. Participants were randomly assigned to receive 100 mg of enteric-coated aspirin or placebo. Deaths were classified according to the underlying cause by adjudicators who were unaware of trial-group assignments. Hazard ratios were calculated to compare mortality between the aspirin group and the placebo group, and post hoc exploratory analyses of specific causes of death were performed. RESULTS: Of the 19,114 persons who were enrolled, 9525 were assigned to receive aspirin and 9589 to receive placebo. A total of 1052 deaths occurred during a median of 4.7 years of follow-up. The risk of death from any cause was 12.7 events per 1000 person-years in the aspirin group and 11.1 events per 1000 person-years in the placebo group (hazard ratio, 1.14; 95% confidence interval [CI], 1.01 to 1.29). Cancer was the major contributor to the higher mortality in the aspirin group, accounting for 1.6 excess deaths per 1000 person-years. Cancer-related death occurred in 3.1% of the participants in the aspirin group and in 2.3% of those in the placebo group (hazard ratio, 1.31; 95% CI, 1.10 to 1.56). CONCLUSIONS: Higher all-cause mortality was observed among apparently healthy older adults who received daily aspirin than among those who received placebo and was attributed primarily to cancer-related death. In the context of previous studies, this result was unexpected and should be interpreted with caution. (Funded by the National Institute on Aging and others; ASPREE ClinicalTrials.gov number, NCT01038583 .).

Asunto(s)

Aspirina/uso terapéutico , Mortalidad , Inhibidores de Agregación Plaquetaria/uso terapéutico , Administración Oral , Anciano , Anciano de 80 o más Años , Aspirina/efectos adversos , Australia , Causas de Muerte , Femenino , Estudios de Seguimiento , Hemorragia/inducido químicamente , Hemorragia/mortalidad , Humanos , Vida Independiente , Masculino , Neoplasias/mortalidad , Inhibidores de Agregación Plaquetaria/efectos adversos , Insuficiencia del Tratamiento , Estados Unidos

RESUMEN

BACKGROUND: Bleeding is the major risk of aspirin treatment, especially in the elderly. A consensus definition for clinically significant bleeding (CSB) in aspirin primary prevention trials is lacking in the literature. METHODS: This paper details the development, modification, application, and quality control of a definition for clinically significant bleeding in the ASPirin in Reducing Events in the Elderly (ASPREE) trial, a primary prevention trial of aspirin in 19,114 community-dwelling elderly men and women. In ASPREE a confirmed bleeding event needed to meet criteria both for substantiated bleeding and clinical significance. Substantiated bleeding was defined as: 1) observed bleeding, 2) a reasonable report of symptoms of bleeding, 3) medical, nursing or paramedical report, or 4) imaging evidence. Bleeding was defined as clinically significant if it: 1) required transfusion of red blood cells, 2) required admission to the hospital for >24 h, or prolonged a hospitalization, with bleeding as the principal reason, 3) required surgery to stop the bleeding, or 4) resulted in death. Bleeding sites were subclassified as upper gastrointestinal, lower gastrointestinal, intracranial (hemorrhagic stroke, subarachnoid hemorrhage, subdural hematoma, extradural hematoma, or other), or other sites. Potential events were retrieved from medical records, self-report or notification from treating doctors. Two reviewers adjudicated each event using electronic adjudication software, and discordant cases were reviewed by a third reviewer. Adjudication rules evolved to become more strictly defined as the trial progressed and decision rules were added to assist with frequent scenarios such as post-operative bleeding. CONCLUSIONS: This paper provides a detailed methodologic description of the development of a standardized definition for clinically significant bleeding and provides a benchmark for development of a consensus definition for future aspirin primary prevention trials. TRIAL REGISTRATION: ASPREE is registered on the International Standard Randomized Controlled Trial Number Register (ISRCTN83772183) and on clinicaltrials.gov (NCT01038583).

RESUMEN

OBJECTIVES: This study sought to determine whether Holter-based parameters of heart rate variability (HRV) are independently associated with incident heart failure among older adults in the CHS (Cardiovascular Health Study) as evidenced by an improvement in the predictive power of the Health Aging and Body Composition Heart Failure (Health ABC) score. BACKGROUND: Abnormal HRV, a marker of autonomic dysfunction, has been associated with multiple adverse cardiovascular outcomes but not the development of congestive heart failure (CHF). METHODS: Asymptomatic CHS participants with interpretable 24-h baseline Holter recordings were included (n = 1,401). HRV measures and premature ventricular contraction (PVC) counts were compared between participants with (n = 260) and without (n = 1,141) incident CHF on follow-up. Significantly different parameters between groups were added to the components of the Health ABC score, a validated CHF prediction tool, using stepwise Cox regression. RESULTS: The final model included components of the Health ABC score, In PVC counts (adjusted hazard ratio [aHR]: 1.12; 95% confidence interval [CI]: 1.07 to 1.19; p < 0.001) and the following HRV measures: abnormal heart rate turbulence onset (aHR: 1.52; 95% CI: 1.11 to 2.08; p = 0.009), short-term fractal scaling exponent (aHR: 0.27; 95% CI: 0.14 to 0.53; p < 0.001), in very low frequency power (aHR: 1.28; 95% CI: 1.02 to 1.60; p = 0.037), and coefficient of variance of N-N intervals (aHR: 0.94; 95% CI: 0.90 to 0.99; p = 0.009). The C-statistic for the final model was significantly improved over the Health ABC model alone (0.77 vs. 0.73; p = 0.0002). CONCLUSIONS: Abnormal HRV parameters were significantly and independently associated with incident CHF in asymptomatic, older adults. When combined with increased PVCs, HRV improved the predictive power of the Health ABC score.

Asunto(s)

Arritmias Cardíacas/complicaciones , Insuficiencia Cardíaca/etiología , Frecuencia Cardíaca/fisiología , Anciano , Anciano de 80 o más Años , Arritmias Cardíacas/fisiopatología , Ritmo Circadiano , Electrocardiografía Ambulatoria , Femenino , Humanos , Masculino , Péptido Natriurético Encefálico/metabolismo , Fragmentos de Péptidos/metabolismo , Pronóstico , Estudios Retrospectivos , Medición de Riesgo/métodos , Factores de Riesgo , Complejos Prematuros Ventriculares/complicaciones , Complejos Prematuros Ventriculares/fisiopatología

RESUMEN

We aimed to investigate if trajectory components (baseline level, slope, and variability) of peripheral interleukin-6 (IL-6) over time were related to cognitive impairment and smaller hippocampal volume and if hippocampal volume explained the associations between IL-6 and cognitive impairment. Multivariable regression models were used to test the association between IL-6 trajectory components with change in neuroimaging measures of the hippocampus and with cognitive impairment among 135 older adults (70-79 years at baseline) from the Healthy Brain Project over 14 years. IL-6 variability was positively associated with cognitive impairment (odds ratio [OR] = 5.86, 95% confidence interval [CI]: 1.24, 27.61) and with greater decrease per year of gray matter volume of the hippocampus (ß = -0.008, standard error = 0.004, p = 0.03). After adjustment for hippocampal volume, the OR of cognitive impairment decreased for each unit of IL-6 variability and CIs widened (OR = 4.36, 95% CI: 0.67, 28.29). Neither baseline levels nor slopes of IL-6 were related to cognitive impairment or hippocampal volume. We believe this has potential clinical and public health implications by suggesting adults with stable levels of peripheral IL-6 may be better targets for intervention studies for slowing or preventing cognitive decline.

Asunto(s)

Envejecimiento/metabolismo , Envejecimiento/patología , Trastornos del Conocimiento/metabolismo , Trastornos del Conocimiento/patología , Hipocampo/patología , Interleucina-6/metabolismo , Anciano , Estudios de Cohortes , Femenino , Sustancia Gris/patología , Humanos , Masculino , Neuroimagen , Estudios Prospectivos , Análisis de Regresión , Factores de Tiempo

RESUMEN

OBJECTIVES: Severe infections, often requiring ICU admission, have been associated with persistent cognitive dysfunction. Less severe infections are more common and whether they are associated with an increased risk of dementia is unclear. We determined the association of pneumonia hospitalization with risk of dementia in well-functioning older adults. DESIGN: Secondary analysis of a randomized multicenter trial to determine the effect of Gingko biloba on incident dementia. SETTING: Five academic medical centers in the United States. SUBJECTS: Healthy community volunteers (n = 3,069) with a median follow-up of 6.1 years. INTERVENTIONS: None. MEASUREMENT AND MAIN RESULTS: We identified pneumonia hospitalizations using International Classification of Diseases, 9th Edition-Coding Manual codes and validated them in a subset. Less than 3% of pneumonia cases necessitated ICU admission, mechanical ventilation, or vasopressor support. Dementia was adjudicated based on neuropsychological evaluation, neurological examination, and MRI. Two hundred twenty-one participants (7.2%) incurred at least one hospitalization with pneumonia (mean time to pneumonia = 3.5 yr). Of these, dementia was developed in 38 (17%) after pneumonia, with half of these cases occurring 2 years after the pneumonia hospitalization. Hospitalization with pneumonia was associated with increased risk of time to dementia diagnosis (unadjusted hazard ratio = 2.3; CI, 1.6-3.2; p < 0.0001). The association remained significant when adjusted for age, sex, race, study site, education, and baseline mini-mental status examination (hazard ratio = 1.9; CI, 1.4-2.8; p < 0.0001). Results were unchanged when additionally adjusted for smoking, hypertension, diabetes, heart disease, and preinfection functional status. Results were similar using propensity analysis where participants with pneumonia were matched to those without pneumonia based on age, probability of developing pneumonia, and similar trajectories of cognitive and physical function prior to pneumonia (adjusted prevalence rates, 91.7 vs 65 cases per 1,000 person-years; adjusted prevalence rate ratio = 1.6; CI, 1.06-2.7; p = 0.03). Sensitivity analyses showed that the higher risk also occurred among those hospitalized with other infections. CONCLUSION: Hospitalization with pneumonia is associated with increased risk of dementia.

Asunto(s)

Demencia/etiología , Hospitalización , Neumonía/complicaciones , Anciano , Anciano de 80 o más Años , Demencia/diagnóstico , Demencia/epidemiología , Femenino , Humanos , Masculino , Prevalencia , Puntaje de Propensión , Escalas de Valoración Psiquiátrica , Riesgo , Factores de Riesgo , Estados Unidos/epidemiología

RESUMEN

OBJECTIVE: To determine whether a high prevalence (55%) of Aß deposition in a cohort of individuals remaining dementia-free into their 9th and 10th decades is associated with cognitive decline prior to imaging. METHODS: A total of 194 participants (mean age 85.5 years, range 82-95) who completed the Ginkgo Evaluation of Memory Study (GEMS) and remained dementia-free subsequently completed Pittsburgh compound B-PET imaging. We examined cross-sectional associations between Aß status and performance on a broad neuropsychological test battery completed at GEMS entry 7-9 years prior to neuroimaging. We also longitudinally examined cognition over annual evaluations using linear mixed models. RESULTS: At GEMS screening (2000-2002), participants who were Aß-positive in 2009 had lower performance on the Stroop test (p < 0.01) and Raven's Progressive Matrices (p = 0.05), with trend level difference for Block Design (p = 0.07). Longitudinal analyses showed significant slope differences for immediate and delayed recall of the Rey-Osterrieth figure, semantic fluency, and Trail-Making Test parts A and B, indicating greater performance decline prior to neuroimaging for Aß-positive relative to Aß-negative participants (ps < 0.05). CONCLUSIONS: Highly prevalent Aß deposition in oldest-older adults is associated with cognitive decline in visual memory, semantic fluency, and psychomotor speed beginning 7-9 years prior to neuroimaging. Mean differences in nonmemory domains, primarily executive functions, between Aß-status groups may be detectable 7-9 years before neuroimaging.

Asunto(s)

Péptidos beta-Amiloides/metabolismo , Trastornos del Conocimiento/complicaciones , Demencia/prevención & control , Ginkgo biloba , Fitoterapia/métodos , Preparaciones de Plantas/uso terapéutico , Anciano , Anciano de 80 o más Años , Compuestos de Anilina , Trastornos del Conocimiento/tratamiento farmacológico , Estudios Transversales , Demencia/diagnóstico por imagen , Demencia/etiología , Método Doble Ciego , Femenino , Humanos , Modelos Lineales , Estudios Longitudinales , Imagen por Resonancia Magnética , Masculino , Pruebas Neuropsicológicas , Tomografía de Emisión de Positrones , Escalas de Valoración Psiquiátrica , Estudios Retrospectivos , Tiazoles

RESUMEN

Exceptional aging has been defined as maintenance of physical and cognitive function beyond the median lifespan despite a history of diseases and/or concurrent subclinical conditions. Since immunity is vital to individual fitness, we examined immunologic fingerprint(s) of highly functional elders. Therefore, survivors of the Cardiovascular Health Study in Pittsburgh, Pennsylvania, USA were recruited (n = 140; mean age = 86 years) and underwent performance testing. Blood samples were collected and examined blindly for humoral factors and T cell phenotypes. Based on results of physical and cognitive performance testing, elders were classified as "impaired" or "unimpaired", accuracy of group assignment was verified by discriminant function analysis. The two groups showed distinct immune profiles as determined by factor analysis. The dominant immune signature of impaired elders consisted of interferon (IFN)-γ, interleukin (IL)-6, tumor necrosis factor-α, and T cells expressing inhibitory natural killer-related receptors (NKR) CD158a, CD158e, and NKG2A. In contrast, the dominant signature of unimpaired elders consisted of IL-5, IL-12p70, and IL-13 with co-expression of IFN-γ, IL-4, and IL-17, and T cells expressing stimulatory NKRs CD56, CD16, and NKG2D. In logistic regression models, unimpaired phenotype was predicted independently by IL-5 and by CD4(+)CD28(null)CD56(+)CD57(+) T cells. All elders had high antibody titers to common viruses including cytomegalovirus. In cellular bioassays, T cell receptor (TCR)-independent ligation of either CD56 or NKG2D elicited activation of T cells. Collectively, these data demonstrate the importance of immunological parameters in distinguishing between health phenotypes of older adults. NKR(+) T cells and cytokine upregulation indicate a unique physiologic environment in old age. Correlation of particular NKR(+) T cell subsets and IL-5 with unimpaired performance, and NKR-driven TCR-independent activation of T cells suggest novel immunopathway(s) that could be exploited to improve immunity in old age.

Asunto(s)

Envejecimiento/sangre , Envejecimiento/inmunología , Trastornos del Conocimiento/fisiopatología , Citocinas/sangre , Células Asesinas Naturales/inmunología , Subgrupos de Linfocitos T/inmunología , Adolescente , Adulto , Anciano de 80 o más Años , Envejecimiento/fisiología , Antígeno CD56/metabolismo , Fenómenos Fisiológicos Cardiovasculares , Trastornos del Conocimiento/sangre , Trastornos del Conocimiento/inmunología , Regulación de la Expresión Génica/inmunología , Humanos , Inmunidad Humoral , Longevidad/inmunología , Longevidad/fisiología , Masculino , Subfamilia K de Receptores Similares a Lectina de Células NK/metabolismo , Fenotipo , Aptitud Física/fisiología , Subgrupos de Linfocitos T/metabolismo , Adulto Joven

RESUMEN

BACKGROUND: Adiponectin has anti-inflammatory properties, and its production is suppressed by inflammatory factors. Although elevated levels of adiponectin and inflammatory markers each predict mortality in older adults, the implications of their interdependent actions have not been examined. METHODS: We investigated the joint associations of levels and interval changes in adiponectin, C-reactive protein (CRP), and interleukin 6 (IL-6) with risk of death in 840 older adults participating in a population-based study. Adiponectin, CRP, and IL-6 were measured in samples collected 8.9 (8.2-9.8) years apart, and all-cause mortality was subsequently ascertained (n = 176). RESULTS: Interval changes and end levels of adiponectin, CRP, and IL-6 showed mostly positive, independent associations with mortality, without evidence of multiplicative interaction. Joint models, however, showed an U-shaped relationship between end level of adiponectin and outcome (hazard ratio [HR] [95% CI] = 0.72 [0.52-0.99] per standard deviation [SD] for levels <20.0 mg/L; HR = 1.91 [1.61-3.44] per SD for levels ≥20.0 mg/L). Participants with the greatest longitudinal increases (upper quartile) in both adiponectin and inflammatory markers had a higher risk of death (HR = 2.85 [1.78-4.58]) than those with large increases in adiponectin alone (HR = 1.87 [1.20-2.92]) (p = .043), but not inflammatory markers alone (HR = 2.48 [1.67-3.67]) (p = .55), as compared with smaller changes for both. CONCLUSION: Higher levels or interval change in adiponectin and inflammatory markers predict increased mortality in older persons independent of each other, although for adiponectin, the association appears inverse below 20 mg/L. These findings suggest that inflammatory and noninflammatory mechanisms governing aging-related decline operate in parallel and provide a potential explanation for paradoxical adiponectin-outcome associations reported previously.

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Adiponectina/metabolismo , Mortalidad/tendencias , Anciano de 80 o más Años , Biomarcadores/metabolismo , Proteína C-Reactiva/metabolismo , Enfermedades Cardiovasculares/metabolismo , Enfermedades Cardiovasculares/mortalidad , Distribución de Chi-Cuadrado , Ensayo de Inmunoadsorción Enzimática , Femenino , Humanos , Inflamación/metabolismo , Interleucina-6/metabolismo , Masculino , Valor Predictivo de las Pruebas , Factores de Riesgo , Sensibilidad y Especificidad , Análisis de Supervivencia , Estados Unidos

RESUMEN

BACKGROUND: Cross-sectional studies show that adiponectin is higher in older than in younger adults but long-term change in adiponectin, its determinants, and its relationship to functional decline or survival in the elderly population have not been evaluated. METHODS: We investigated predictors of longitudinal change in adiponectin, and the association of this adipokine or its antecedent change with physical deterioration and all-cause mortality in 988 participants in a population-based study who completed examinations in 1996-1997 and 2005-2006, had serial adiponectin measurements and underwent follow-up through June 2009. RESULTS: Adiponectin level rose significantly during follow-up, but the increase was smaller in blacks, was associated with declining weight or fasting glucose and, in men, lower albumin, and was affected by medications. Adiponectin was independently associated with greater physical decline, but the relationship for adiponectin change was driven by concomitant weight decrease. Both adiponectin and its change independently predicted mortality, even after adjustment for weight change. The association for adiponectin and mortality was observed in whites but not in blacks and only for levels in the upper range (hazard ratio = 1.85, 95% confidence interval = 1.36-2.52 per SD ≥ 20 mg/L), whereas that for adiponectin change was linear throughout in both racial groups (hazard ratio = 1.30, 95% confidence interval = 1.10-1.52 per SD). CONCLUSIONS: Adiponectin levels increase over time in long-lived adults and are associated with greater physical disability and mortality. Such increases may occur in response to age-related homeostatic dysregulation. Additional investigation is required to define the underlying mechanisms and whether this represents a marker or causal factor for mortality in this age group.

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Adiponectina/metabolismo , Envejecimiento/metabolismo , Aptitud Física , Factores de Edad , Anciano , Análisis de Varianza , Enfermedades Cardiovasculares/mortalidad , Causas de Muerte , Distribución de Chi-Cuadrado , Estudios de Cohortes , Estudios Transversales , Femenino , Estado de Salud , Humanos , Modelos Lineales , Masculino , Modelos de Riesgos Proporcionales , Factores de Riesgo , Factores Sexuales , Factores de Tiempo , Estados Unidos/epidemiología

RESUMEN

OBJECTIVES: To describe retention according to age and visit type (clinic, home, telephone) and to determine characteristics associated with visit types for a longitudinal epidemiological study in older adults. DESIGN: Longitudinal cohort study. SETTING: Four U.S. clinical sites. PARTICIPANTS: Five thousand eight hundred eighty-eight Cardiovascular Health Study (CHS) participants aged 65 to 100 at 1989/90 or 1992/93 enrollment (58.6% female; 15.7% black). CHS participants were contacted every 6 months, with annual assessments through 1999 and in 2005/06 for the All Stars Study visit of the CHS cohort (aged 77-102; 66.5% female; 16.6% black). MEASUREMENTS: All annual contacts through 1999 (n=43,772) and for the 2005/06 visit (n=1,942). RESULTS: CHS had 43,772 total participant contacts from 1989 to 1999: 34,582 clinic visits (79.0%), 2,238 refusals (5.1%), 4,401 telephone visits (10.1%), 1,811 home visits (4.1%), and 740 other types (1.7%). In 2005/06, the All Stars participants of the CHS cohort had 36.6% clinic, 22.3% home, and 41.1% telephone visits. Compared with participants aged 65 to 69, odds ratios of not attending a CHS clinic visit were 1.82 (95% confidence interval (CI)=1.54-2.13), 2.94 (95% CI=2.45-3.57), 4.55 (95% CI=3.70-5.56), and 9.09 (95% CI=7.69-11.11) for those aged 70 to 74, 75 to 79, 80 to 84, and 85 and older, respectively, in sex-adjusted regression. In multivariable regression, participants with a 2005/06 clinic visit were younger, more likely to be male and in good health, and had had better cognitive and physical function 7 years earlier than participants with other visit types. Participants with home, telephone, and missing visits were similar on characteristics measured 7 years earlier. CONCLUSION: Offering home, telephone, and proxy visits are essential to optimizing follow-up of aging cohorts. Home visits increased in-person retention from 36.5% to 58.8% and diversified the cohort with respect to age, health, and physical functioning.

Asunto(s)

Anciano de 80 o más Años , Instituciones de Atención Ambulatoria , Enfermedades Cardiovasculares/epidemiología , Visita Domiciliaria , Estudios Longitudinales , Sujetos de Investigación , Teléfono , Factores de Edad , Anciano , Anciano de 80 o más Años/estadística & datos numéricos , Instituciones de Atención Ambulatoria/estadística & datos numéricos , Análisis de Varianza , Distribución de Chi-Cuadrado , Estudios Epidemiológicos , Femenino , Evaluación Geriátrica , Visita Domiciliaria/estadística & datos numéricos , Humanos , Modelos Logísticos , Masculino , Análisis Multivariante , Pacientes Desistentes del Tratamiento/estadística & datos numéricos , Selección de Paciente , Sujetos de Investigación/provisión & distribución , Teléfono/estadística & datos numéricos , Estados Unidos/epidemiología

RESUMEN

BACKGROUND: Cardiovascular disease (CVD) was a preplanned secondary outcome of the Ginkgo Evaluation of Memory Study. The trial previously reported that Ginkgo biloba had no effect on the primary outcome, incident dementia. METHODS AND RESULTS: The double-blind trial randomly assigned 3069 participants over 75 years of age to 120 mg of G biloba EGb 761 twice daily or placebo. Mean follow-up was 6.1 years. The identification and classification of CVD was based on methods used in the Cardiovascular Health Study. Differences in time to event between G biloba and placebo were evaluated using Cox proportional hazards regression adjusted for age and sex. There were 355 deaths in the study, 87 due to coronary heart disease with no differences between G biloba and placebo. There were no differences in incident myocardial infarction (n=164), angina pectoris (n=207), or stroke (151) between G biloba and placebo. There were 24 hemorrhagic strokes, 16 on G biloba and 8 on placebo (not significant). There were only 35 peripheral vascular disease events, 12 (0.8%) on G biloba and 23 (1.5%) on placebo (P=0.04, exact test). Most of the peripheral vascular disease cases had either vascular surgery or amputation. CONCLUSIONS: There was no evidence that G biloba reduced total or CVD mortality or CVD events. There were more peripheral vascular disease events in the placebo arm. G biloba cannot be recommended for preventing CVD. Further clinical trials of peripheral vascular disease outcomes might be indicated. CLINICAL TRIAL REGISTRATION: clinicaltrials.gov Identifier: NCT00010803.

Asunto(s)

Fármacos Cardiovasculares/uso terapéutico , Enfermedades Cardiovasculares/prevención & control , Ginkgo biloba , Extractos Vegetales/uso terapéutico , Factores de Edad , Anciano , Anciano de 80 o más Años , Enfermedades Cardiovasculares/etiología , Enfermedades Cardiovasculares/mortalidad , Método Doble Ciego , Medicina Basada en la Evidencia , Femenino , Hospitalización , Humanos , Masculino , Guías de Práctica Clínica como Asunto , Modelos de Riesgos Proporcionales , Medición de Riesgo , Factores de Riesgo , Factores de Tiempo , Resultado del Tratamiento , Estados Unidos/epidemiología

RESUMEN

CONTEXT: The herbal product Ginkgo biloba is taken frequently with the intention of improving cognitive health in aging. However, evidence from adequately powered clinical trials is lacking regarding its effect on long-term cognitive functioning. OBJECTIVE: To determine whether G. biloba slows the rates of global or domain-specific cognitive decline in older adults. DESIGN, SETTING, AND PARTICIPANTS: The Ginkgo Evaluation of Memory (GEM) study, a randomized, double-blind, placebo-controlled clinical trial of 3069 community-dwelling participants aged 72 to 96 years, conducted in 6 academic medical centers in the United States between 2000 and 2008, with a median follow-up of 6.1 years. INTERVENTION: Twice-daily dose of 120-mg extract of G. biloba (n = 1545) or identical-appearing placebo (n = 1524). MAIN OUTCOME MEASURES: Rates of change over time in the Modified Mini-Mental State Examination (3MSE), in the cognitive subscale of the Alzheimer Disease Assessment Scale (ADAS-Cog), and in neuropsychological domains of memory, attention, visual-spatial construction, language, and executive functions, based on sums of z scores of individual tests. RESULTS: Annual rates of decline in z scores did not differ between G. biloba and placebo groups in any domains, including memory (0.043; 95% confidence interval [CI], 0.034-0.051 vs 0.041; 95% CI, 0.032-0.050), attention (0.043; 95% CI, 0.037-0.050 vs 0.048; 95% CI, 0.041-0.054), visuospatial abilities (0.107; 95% CI, 0.097-0.117 vs 0.118; 95% CI, 0.108-0.128), language (0.045; 95% CI, 0.037-0.054 vs 0.041; 95% CI, 0.033-0.048), and executive functions (0.092; 95% CI, 0.086-0.099 vs 0.089; 95% CI, 0.082-0.096). For the 3MSE and ADAS-Cog, rates of change varied by baseline cognitive status (mild cognitive impairment), but there were no differences in rates of change between treatment groups (for 3MSE, P = .71; for ADAS-Cog, P = .97). There was no significant effect modification of treatment on rate of decline by age, sex, race, education, APOE*E4 allele, or baseline mild cognitive impairment (P > .05). CONCLUSION: Compared with placebo, the use of G. biloba, 120 mg twice daily, did not result in less cognitive decline in older adults with normal cognition or with mild cognitive impairment. TRIAL REGISTRATION: clinicaltrials.gov Identifier: NCT00010803.

Asunto(s)

Trastornos del Conocimiento/prevención & control , Cognición/efectos de los fármacos , Ginkgo biloba , Fitoterapia , Preparaciones de Plantas/uso terapéutico , Anciano , Anciano de 80 o más Años , Envejecimiento/fisiología , Apolipoproteína E4/genética , Cognición/fisiología , Trastornos del Conocimiento/genética , Método Doble Ciego , Femenino , Humanos , Masculino , Pruebas Neuropsicológicas , Preparaciones de Plantas/administración & dosificación

RESUMEN

OBJECTIVES: To identify, characterize and compare the frequency of mild cognitive impairment (MCI) subtypes at baseline in a large, late-life cohort (n = 3063) recruited into a dementia prevention trial. METHOD: A retrospective, data-algorithmic approach was used to classify participants as cognitively normal or MCI with corresponding subtype (e.g. amnestic vs. non-amnestic, single domain vs. multiple domain) based on a comprehensive battery of neuropsychological test scores, with and without Clinical Dementia Rating (CDR) global score included in the algorithm. RESULTS: Overall, 15.7% of cases (n = 480) were classified as MCI. Amnestic MCI was characterized as unilateral memory impairment (i.e. only verbal or only visual memory impaired) or bilateral memory impairment (i.e. both verbal and visual memory impaired). All forms of amnestic MCI were almost twice as frequent as non-amnestic MCI (10.0% vs. 5.7%). Removing the CDR = 0.5 ('questionable dementia') criterion resulted in a near doubling of the overall MCI frequency to 28.1%. CONCLUSION: Combining CDR and cognitive test data to classify participants as MCI resulted in overall MCI and amnestic MCI frequencies consistent with other large community-based studies, most of which relied on the 'gold standard' of individual case review and diagnostic consensus. The present data-driven approach may prove to be an effective alternative for use in future large-scale dementia prevention trials.

Asunto(s)

Trastornos del Conocimiento/clasificación , Trastornos del Conocimiento/diagnóstico , Pruebas Neuropsicológicas , Anciano , Anciano de 80 o más Años , Algoritmos , Trastornos del Conocimiento/epidemiología , Trastornos del Conocimiento/prevención & control , Estudios de Cohortes , Humanos , Entrevista Psicológica , Estudios Retrospectivos , Estados Unidos/epidemiología

RESUMEN

OBJECTIVES: To evaluate shared and unique risk factors for maintaining physical and cognitive function into the ninth decade and beyond. DESIGN: Longitudinal cohort study. SETTING: Four U.S. communities. PARTICIPANTS: One thousand six hundred seventy-seven participants in the Cardiovascular Health Study All Stars Study, assessed in 2005/06. Median age was 85 (range 77-102), 66.5% were women, and 16.6% were black. MEASUREMENTS: Intact function was defined as no difficulty with any activities of daily living and a score of 80 or higher on the Modified Mini-Mental State Examination. Baseline characteristics assessed in 1992/93 included demographics, behavioral health factors, chronic disease history, subclinical disease markers, cardiovascular risk factors, and inflammatory markers. Multinomial logistic regression was used to compare risk for physical disability, cognitive impairment,and combined impairments with no functional impairment. RESULTS: Of the 1,677 participants evaluated in both domains, 891 (53%) were functionally intact. Continuous measures of function, including the Digit Symbol Substitution Test and gait speed, showed that all groups, including the most functional, had declined over time. The functional group had less decline but also tended to have higher starting values. Functional individuals had a higher baseline health profile than those with either or cognitive impairment or both impairments combined. Women and individuals with greater weight had higher rates of physical impairment but not cognitive impairment. Risk factors common to both types of impairment included cardiovascular disease and hypertension. CONCLUSION: Intact function was found in only approximately half of these older adults in the ninth decade and beyond. High baseline function and low vascular disease risk characterized functional aging.

Asunto(s)

Actividades Cotidianas/clasificación , Enfermedades Cardiovasculares/epidemiología , Escala del Estado Mental/estadística & datos numéricos , Factores de Edad , Anciano , Anciano de 80 o más Años , Enfermedad de Alzheimer/epidemiología , Atención , Enfermedad Crónica/epidemiología , Estudios de Cohortes , Comorbilidad , Estudios Transversales , Femenino , Estudios de Seguimiento , Marcha , Evaluación Geriátrica/estadística & datos numéricos , Fuerza de la Mano , Encuestas Epidemiológicas , Humanos , Masculino , Memoria a Corto Plazo , Modelos de Riesgos Proporcionales , Psicometría , Factores de Riesgo , Estados Unidos

RESUMEN

OBJECTIVES: To compare nosologist coding of underlying cause of death according to the death certificate with adjudicated cause of death for subjects aged 65 and older in the Cardiovascular Health Study (CHS). DESIGN: Observational. SETTING: Four communities: Forsyth County, North Carolina (Wake Forest University); Sacramento County, California (University of California at Davis); Washington County, Maryland (Johns Hopkins University); and Pittsburgh, Pennsylvania (University of Pittsburgh). PARTICIPANTS: Men and women aged 65 and older participating in CHS, a longitudinal study of coronary heart disease and stroke, who died through June 2004. MEASUREMENTS: The CHS centrally adjudicated underlying cause of death for 3,194 fatal events from June 1989 to June 2004 using medical records, death certificates, proxy interviews, and autopsies, and results were compared with underlying cause of death assigned by a trained nosologist based on death certificate only. RESULTS: Comparison of 3,194 CHS versus nosologist underlying cause of death revealed moderate agreement except for cancer (kappa=0.91, 95% confidence interval (CI)=0.89-0.93). kappas varied according to category (coronary heart disease, kappa=0.61, 95% CI=0.58-0.64; stroke, kappa=0.59, 95% CI=0.54-0.64; chronic obstructive pulmonary disease, kappa=0.58, 95% CI=0.51-0.65; dementia, kappa=0.40, 95% CI=0.34-0.45; and pneumonia, kappa=0.35, 95% CI=0.29-0.42). Differences between CHS and nosologist coding of dementia were found especially in older ages in the sex and race categories. CHS attributed 340 (10.6%) deaths due to dementia, whereas nosologist coding attributed only 113 (3.5%) to dementia as the underlying cause. CONCLUSION: Studies that use only death certificates to determine cause of death may result in misclassification and potential bias. Changing trends in cause-specific mortality in older individuals may be a function of classification process rather than incidence and case fatality.

Asunto(s)

Enfermedad Coronaria/mortalidad , Certificado de Defunción , Control de Formularios y Registros , Accidente Cerebrovascular/mortalidad , Anciano , Anciano de 80 o más Años , Causas de Muerte , Femenino , Humanos , Estudios Longitudinales , Masculino