Abstract-This document details the procedures and recommendations of the Goals and Metrics Committee of the StrategicPlanning Task Force of the American Heart Association, which developed the 2020 Impact Goals for the organization.The committee was charged with defining a new concept, cardiovascular health, and determining the metrics needed to monitor it over time. Ideal cardiovascular health, a concept well supported in the literature, is defined by the presence of both ideal health behaviors (nonsmoking, body mass index Ͻ25 kg/m 2 , physical activity at goal levels, and pursuit of a diet consistent with current guideline recommendations) and ideal health factors (untreated total cholesterol Ͻ200 mg/dL, untreated blood pressure Ͻ120/Ͻ80 mm Hg, and fasting blood glucose Ͻ100 mg/dL). Appropriate levels for children are also provided. With the use of levels that span the entire range of the same metrics, cardiovascular health status for the whole population is defined as poor, intermediate, or ideal. These metrics will be monitored to determine the changing prevalence of cardiovascular health status and define achievement of the Impact Goal. In addition, the committee recommends goals for further reductions in cardiovascular disease and stroke mortality. Thus, the committee recommends the following Impact Goals: "By 2020, to improve the cardiovascular health of all Americans by 20% while reducing deaths from cardiovascular diseases and stroke by 20%." These goals will require new strategic directions for the American Heart Association in its research, clinical, public health, and advocacy programs for cardiovascular health promotion and disease prevention in the next decade and beyond. (Circulation. 2010;121:586-613.) Key Words: AHA Special Reports Ⅲ obesity Ⅲ quality of life Ⅲ epidemiology Ⅲ risk factors Ⅲ quality of care
We introduce random survival forests, a random forests method for the
analysis of right-censored survival data. New survival splitting rules for
growing survival trees are introduced, as is a new missing data algorithm for
imputing missing data. A conservation-of-events principle for survival forests
is introduced and used to define ensemble mortality, a simple interpretable
measure of mortality that can be used as a predicted outcome. Several
illustrative examples are given, including a case study of the prognostic
implications of body mass for individuals with coronary artery disease.
Computations for all examples were implemented using the freely available
R-software package, randomSurvivalForest.Comment: Published in at http://dx.doi.org/10.1214/08-AOAS169 the Annals of
Applied Statistics (http://www.imstat.org/aoas/) by the Institute of
Mathematical Statistics (http://www.imstat.org
A delayed decrease in the heart rate during the first minute after graded exercise, which may be a reflection of decreased vagal activity, is a powerful predictor of overall mortality, independent of workload, the presence or absence of myocardial perfusion defects, and changes in heart rate during exercise.
Background-The presence of systemic inflammation determined by elevations in C-reactive protein (CRP) has been associated with persistence of atrial fibrillation (AF). The relationship between CRP and prediction of AF has not been studied in a large population-based cohort. Methods and Results-CRP measurement and cardiovascular assessment were performed at baseline in 5806 subjects enrolled in the Cardiovascular Health Study. Patients were followed up for a mean of 6.9Ϯ1.6 (median 7.8) years. AF was identified by self-reported history and ECGs at baseline and by ECGs and hospital discharge diagnoses at follow-up. Univariate and multivariate analyses were used to assess CRP as a predictor of baseline and future development of AF. At baseline, 315 subjects (5%) had AF. Compared with subjects in the first CRP quartile (Ͻ0.97 mg/L), subjects in the fourth quartile (Ͼ3.41 mg/L) had more AF (7.4% versus 3.7%, adjusted OR 1.
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