Diagnostic techniques in generalized estimating equations
We consider herein diagnostic methods for the quasi-likelihood regression models developed by Zeger and Liang [Zeger, S. L., Liang, K.-Y., 1986, Longitudinal data analysis for discrete and conti-nuous outcomes. Biometrics, 42, 121-130.] to analyse discrete and continuous longitudinal data. Our proposal generalises well-known measures (projection matrix, Cook's distance and standardised resi-duals) developed for independent responses. Moreover, half-normal probability plots with simulated envelopes were developed for assessing the adequacy of the fitted model when the marginal distributions belong to the exponential family. To obtain such a plot, correlated outcomes were generated by simulation using algorithms described in the literature. Finally, two applications were presented to illustrate the techniques.
Keywords: Diagnostic techniques; Generalised estimating equations; Generalised linear models; Longit-udinal data; Quasi-likelihood methods; Repeated measures
Document Type: Research Article
Affiliations: Department of Statistics, Institute of Mathematics and Statistics, University of São Paulo, São Paulo, SP, Brazil
Publication date: 01 January 2007
- Access Key
- Free content
- Partial Free content
- New content
- Open access content
- Partial Open access content
- Subscribed content
- Partial Subscribed content
- Free trial content