title: A random-effects ordinal regression model for multilevel analysis.
abstract: A random-effects ordinal regression model is proposed for analysis of clustered or longitudinal ordinal response data. This model is developed for both the probit and logistic response functions. The threshold concept is used, in which it is assumed that the observed ordered category is determined by the value of a latent unobservable continuous response that follows a linear regression model incorporating random effects. A maximum marginal likelihood (MML) solution is described using Gauss-Hermite quadrature to numerically integrate over the distribution of random effects. An analysis of a dataset where students are clustered or nested within classrooms is used to illustrate features of random-effects analysis of clustered ordinal data, while an analysis of a longitudinal dataset where psychiatric patients are repeatedly rated as to their severity is used to illustrate features of the random-effects approach for longitudinal ordinal data.
authors.affiliation: Prevention Research Center, School of Public Health, University of Illinois at Chicago, Illinois 60607.
authors.forename: D
authors.initials: D
authors.lastname: Hedeker
authors.forename: R D
authors.initials: RD
authors.lastname: Gibbons
mesh_terms: D000293:Adolescent; D002648:Child; D003479:Curriculum; D006266:Health Education; D006801:Humans; D008137:Longitudinal Studies; D008433:Mathematics; D015233:Models, Statistical; D011336:Probability; D011897:Random Allocation; D012044:Regression Analysis; D016540:Smoking Cessation; D000074606:Smoking Prevention