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Statistical Methods in Medical Research
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0962280206071846v1
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*Joint Disorders
*Pain
*Temporomandibular Joint Dysfunction
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Article

A statistical modelling approach for the analysis of TMD chronic pain data

Angela D'Elia*

Centro per la Formazione in Economia e Politica dello Sviluppo Rurale, Via Università 96, I-80055 Portici, Italy

* To whom correspondence should be addressed.


  Abstract

This paper presents a discrete mixture model as a suitable approach for the analysis of chronic pain data, when they are expressed by means of ordered scores (ratings). The model is developed to allow for covariates effects; parameters estimation by maximum likelihood (using an E–M algorithm) and related inferential issues are discussed. A case-study concerning the assessment of pain (for a given pathology) and the effect of patients' covariates (e.g., gender, depression state) is illustrated. Besides, the same covariates are considered also for explaining the disruption in everyday lifestyle due to the chronic pain condition.

First published on August 14, 2007, doi:10.1177/0962280206071846

Statistical Methods in Medical Research 2008;17:389.

A more recent version of this article appeared on August 1, 2008

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