Advance Data from Vital and Health Statistics Number 314. CDC Growth Charts:United States

摘要

This report presents the revised growth charts for the United States. Itsummerizes the history of the 1977 National Center for Health Statistics (NCHS) growth charts, reasons for the revision, data sources and statistical procedures used, and major features of the revised charts. Data from five national health examination surveys collected from 1963 to 1994 and five supplementary data sources were combined to establish an analysis growth chart data set. A variety of statistical procedures were used to produce smoothed percentile curves for infants (from birth to 36 months) and older children (from 2 to 20 years), using a two-stage approach. Initial curve smoothing for selected major percentiles was accomplished with various parametric and nonparametric procedures. In the second stage, a normalization procedure was used to generate z-scores that closely match the smoothed percentile curves.