Until recently data was not available to represent the entire aged population or the exceptionally aged population from one source (Corder & Manton, 1991). Information on physical health in terms of functioning is a multi-dimensional concept requiring direct queries of large numbers of survey sample persons. Since 1984 the National Long Term Care Surveys have uniformly measured health and functioning for the aged U.S. population including institutionalized persons with a sample design that selects high-risk individuals including the exceptionally aged. Selected subjects are part of subsequent samples. Over-samples of the 95+ populations were selected in 1994 and 1999.
This resource is used to describe patterns of health and functioning
over time among long-lived individuals using discrete multivariate
methods, and forecasts conditioned on specific interventions.
Key words:
exceptional longevity physical functioning population sample discrete multivariate models
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