Fast,
comprehensive analysis of data from longitudinal growth studies is now
available on your desktop with the AUXAL program from SSI.
Structural Analysis with the BTT Model or the JPA2 Model
Nonstructural Analysis by Fourier Transform of Residuals
or Kernel Smoothing
The program
performs both structural and nonstructural auxological analysis of human
growth in standing height or recumbent length. It provides accurate fitting or
smoothing of growth curves for height, velocity, and acceleration and displays
the height and velocity curves in publication quality graphic
output.
Maxima and minima
of velocity are located and described. Data from multiple cases can be
analyzed in one pass through the program and the results summarized both
longitudinally and cross-sectionally.
Employing Bayesian
methods of estimation, the program is able to fit the structural models to
incomplete longitudinal data. This facility makes it possible to estimate a
structural average curve for the full growth cycle from mixed longitudinal
data consisting of a sample of short studies beginning at random ages. It also
makes possible the prediction of height at maturity, or any other age, from
one or more measures of height prior to maturity.
Special Features
of the AUXAL program
Data
input
