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Parametric latent class joint model ...

Han, Jun.

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Parametric latent class joint model for longitudinal markers and recurrent events.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Parametric latent class joint model for longitudinal markers and recurrent events./
作者:	Han, Jun.
面頁冊數:	95 p.
附註:	Source: Dissertation Abstracts International, Volume: 66-04, Section: B, page: 2142.
Contained By:	Dissertation Abstracts International66-04B.
標題:	Statistics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3173161
ISBN:	0542102196

Parametric latent class joint model for longitudinal markers and recurrent events.
Han, Jun.

Parametric latent class joint model for longitudinal markers and recurrent events. - 95 p.

Source: Dissertation Abstracts International, Volume: 66-04, Section: B, page: 2142.

Thesis (Ph.D.)--University of South Carolina, 2005.

A joint model for longitudinal markers and recurrent events is proposed. This general model accommodates internal (marker) covariates, external covariates, effects of accumulating event occurrences, and effects caused by intervention after each event occurrence. A latent class mixture-of-experts model is employed to handle an underlying heterogeneous population and associated covariates. A likelihood approach is adopted to obtain parameter estimates. A BIC approximation of integrated classification likelihood criterion is used to select the number of latent classes. A joint distance of longitudinal markers and recurrent events is proposed for classification purposes. Methods of cluster analysis based on the proposed distance are compared. The EM algorithm is used to estimate the parameters in the joint model, and a bootstrap approach is adopted to construct confidence intervals for the parameters. Explicit formulas are given to compute the initial values of parameters for the EM algorithm. Prediction of class membership and event occurrence are considered. Computational issues for obtaining estimates are addressed. A simulation study is performed to examine the properties of the estimators numerically, and theoretical properties of the estimators such as existence, consistency, uniqueness, and asymptotic normality are obtained analytically.

ISBN: 0542102196Subjects--Topical Terms:

517247
Statistics.

Parametric latent class joint model for longitudinal markers and recurrent events.
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502 $a Thesis (Ph.D.)--University of South Carolina, 2005.
520 $a A joint model for longitudinal markers and recurrent events is proposed. This general model accommodates internal (marker) covariates, external covariates, effects of accumulating event occurrences, and effects caused by intervention after each event occurrence. A latent class mixture-of-experts model is employed to handle an underlying heterogeneous population and associated covariates. A likelihood approach is adopted to obtain parameter estimates. A BIC approximation of integrated classification likelihood criterion is used to select the number of latent classes. A joint distance of longitudinal markers and recurrent events is proposed for classification purposes. Methods of cluster analysis based on the proposed distance are compared. The EM algorithm is used to estimate the parameters in the joint model, and a bootstrap approach is adopted to construct confidence intervals for the parameters. Explicit formulas are given to compute the initial values of parameters for the EM algorithm. Prediction of class membership and event occurrence are considered. Computational issues for obtaining estimates are addressed. A simulation study is performed to examine the properties of the estimators numerically, and theoretical properties of the estimators such as existence, consistency, uniqueness, and asymptotic normality are obtained analytically.
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