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DOI: 10.1177/096228029900800105 Parametric models for incomplete continuous and categorical longitudinal dataInstitute of Mathematics and Statistics, The University of Kent, Canterbury, Kent, UK, m.g.kenward{at}ukc.ac.uk
Biostatistics, Limburgs Universiteit Centrum, Belgium This paper reviews models for incomplete continuous and categorical longitudinal data. In terms of Rubin's classification of missing value processes we are specifically concerned with the problem of nonrandom missingness. A distinction is drawn between the classes of selection and pattern-mixture models and, using several examples, these approaches are compared and contrasted. The central roles of identifiability and sensitivity are emphasized throughout.
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