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Conditional pseudolikelihood methods for clustered ordinal, multinomial, or count outcomes with complex survey data
Author(s) -
Brumback Babette A.,
Cai Zhuangyu,
He Zhulin,
Zheng Hao W.,
Dailey Amy B.
Publication year - 2012
Publication title -
statistics in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.996
H-Index - 183
eISSN - 1097-0258
pISSN - 0277-6715
DOI - 10.1002/sim.5625
Subject(s) - covariate , statistics , multinomial logistic regression , estimator , econometrics , ordinal data , ordinal regression , multinomial distribution , computer science , sampling (signal processing) , confounding , odds , logistic regression , mathematics , filter (signal processing) , computer vision
In order to adjust individual‐level covariate effects for confounding due to unmeasured neighborhood characteristics, we have recently developed conditional pseudolikelihood methods to estimate the parameters of a proportional odds model for clustered ordinal outcomes with complex survey data. The methods require sampling design joint probabilities for each within‐neighborhood pair. In the present article, we develop a similar methodology for a baseline category logit model for clustered multinomial outcomes and for a loglinear model for clustered count outcomes. All of the estimators and asymptotic sampling distributions we present can be conveniently computed using standard logistic regression software for complex survey data, such as sas proc surveylogistic . We demonstrate validity of the methods theoretically and also empirically by using simulations. We apply the new method for clustered multinomial outcomes to data from the 2008 Florida Behavioral Risk Factor Surveillance System survey in order to investigate disparities in frequency of dental cleaning both unadjusted and adjusted for confounding by neighborhood. Copyright © 2012 John Wiley & Sons, Ltd.