Abstract
Antedependence (AD) models can be a useful class of models for the covariance struçture of continuous longitudinal data. Like stationary autoregressive (AR) models, AD models allow for serial correlation within subjects but are more general in the sense that they do not stipulate that the variance is constant nor that correlations between measurements equidistant in time are equal. Thus, AD models are more parsimonious class of models for nonstationary data than the completely unstructured model of the classical multivariate approach.
For some nonstationary longitudinal data, a highly structured AD model may be more useful than an unstructured AD model. For example, if the variances increase over time, as is common in growth studies, or if measurements equidistant in time become more highly correlated as the study progresses (due, e.g., to a “learning” effect), then a model that incorporates these structural forms of nonstationarity is likely to be more useful. We introduce and illustrate the utility of some structured AD models. Properties of these models and estimation of model parameters by maximum likelihood are considered. An example is given in which a structured AD model is superior to both a stationary AR model and an unstructured AD model.
†Núñez-Antón’ work supported by Dirección General de Enseñanza Superior del Ministerio Educaión y Cultura under research grant PB95-0346.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
Byrne, P. J. and Arnold, S. F. (1983). Inference about multivariate means for a nonstationary autoregressive model. Journal of the American Statistical Association 78, 850–855.
Diggle, P. J. (1988). An approach to the analysis of repeated measurements. Biometrics 44, 959–971.
Diggle, P. J., Liang, K. Y. and Zeger, S. L. (1994). Analysis of Longitudinal Data. Oxford University Press, New York.
Gabriel, K. R. (1962). Ante-dependence analysis of an ordered set of variables. Annals of Mathematical Statistics 33, 201–212.
Jennrich, R. L. and Schluchter, M. D. (1986). Unbalanced repeated-measures models with structured covariance matrices. Biometrics 42, 805–820.
Jones, R. H. (1990). Serial correlation or random subject effects? Communications in Statistics - Simulation and Computation 19, 1105–1123.
Jones, R. H. (1993). Longitudinal Data with Serial Correlation: A State-Space Approach. Chapman and Hall, London.
Jones, R. H. and Boadi-Boateng, F. (1991). Unequally spaced longitudinal data with AR(1) serial correlation. Biometrics 47, 161–175.
Kenward, M. G. (1987). A method for comparing profiles of repeated measurements. Applied Statistics 36, 296–308.
Lee, J. C. (1988). Prediction and estimation of growth curves with special covariance structures. Journal of the American Statistical Association 83, 432–440.
Lindsey, J. K. (1993). Models for Repeated Measurements. Oxford University Press, Oxford.
Macchiavelli, R. E. and Arnold, S. F. (1994). Variable order ante-dependence models. Communications in Statistics - Theory and Methods 23, 2683–2699.
Muñoz, A., Carey, V., Schouten, J. P., Segal, M., and Rosner, B. (1992). A parametric family of correlation structures for the analysis of longitudinal data. Biometrics 48, 733–742.
Nelder, J. A. and Mead, R. (1965). A simplex method for function minimization. The Computer Journal 7, 308–313.
Schwarz, G. (1978). Estimating the dimension of a model. Annals of Statistics 16, 461–464.
Whittaker, J. (1990). Graphical Models in Applied Multivariate Statistics. Wiley, Chichester.
Zimmerman, D. L., Núñez-Antón, V., and El-Barrai, H. (1997). Computational aspects of likelihood-based estimation of first-order antedependence models. Journal of Statistical Computation and Simulation, forthcoming.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1997 Springer Science+Business Media New York
About this paper
Cite this paper
Zimmerman, D.L., Núñez-Antón, V. (1997). Structured Antedependence Models for Longitudinal Data. In: Gregoire, T.G., Brillinger, D.R., Diggle, P.J., Russek-Cohen, E., Warren, W.G., Wolfinger, R.D. (eds) Modelling Longitudinal and Spatially Correlated Data. Lecture Notes in Statistics, vol 122. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-0699-6_6
Download citation
DOI: https://doi.org/10.1007/978-1-4612-0699-6_6
Publisher Name: Springer, New York, NY
Print ISBN: 978-0-387-98216-8
Online ISBN: 978-1-4612-0699-6
eBook Packages: Springer Book Archive