Warning: The NCBI web site requires JavaScript to function. more...
An official website of the United States government
The .gov means it's official. Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you're on a federal government site.
The site is secure. The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.
Forecasting
The prediction or projection of the nature of future problems or existing conditions based upon the extrapolation or interpretation of existing scientific data or by the application of scientific methodology.
Year introduced: 1980
trends [Subheading]
Used for the manner in which a subject changes, qualitatively or quantitatively, with time, whether past, present, or future. It excludes discussions of the course of disease in particular patients.
Year introduced: 1978