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Power analysis for a mixed effects l...
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Li, Yinmei.
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Power analysis for a mixed effects logistic regression model.
Record Type:
Electronic resources : Monograph/item
Title/Author:
Power analysis for a mixed effects logistic regression model./
Author:
Li, Yinmei.
Description:
72 p.
Notes:
Source: Dissertation Abstracts International, Volume: 67-02, Section: B, page: 0744.
Contained By:
Dissertation Abstracts International67-02B.
Subject:
Statistics. -
Online resource:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3208179
ISBN:
9780542564574
Power analysis for a mixed effects logistic regression model.
Li, Yinmei.
Power analysis for a mixed effects logistic regression model.
- 72 p.
Source: Dissertation Abstracts International, Volume: 67-02, Section: B, page: 0744.
Thesis (Ph.D.)--Louisiana State University and Agricultural & Mechanical College, 2006.
In herd health studies, the mixed effects logistic regression model with random herd effects are commonly used for modeling clustered binary data. These models are well developed and widely used in the literature, among which is the logistic-normal regression model. In contrast to the rich literature in modeling methods, the sample size/power analysis methods for such mixed effects models are sparse. The sample size/power analysis method for the logistic-normal regression model is not readily available. This study is to develop a power analysis/sample size estimation method for the logistic-normal regression model. Extended from the sample size method for the likelihood ratio test in the generalized linear models (Self et al., 1992), a power analysis method for the logistic-normal model is developed based on a noncentral chi-square approximation to the distribution of the likelihood ratio statistic. The method described in this dissertation can be applied to both exchangeable and non-exchangeable responses. The power curves are presented with respect to the change of each of the planning values while holding other planning values fixed for two examples of the logistic-normal model containing one random cluster effect.
ISBN: 9780542564574Subjects--Topical Terms:
517247
Statistics.
Power analysis for a mixed effects logistic regression model.
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Power analysis for a mixed effects logistic regression model.
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Source: Dissertation Abstracts International, Volume: 67-02, Section: B, page: 0744.
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Advisers: James Miller; Daniel Scholl.
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Thesis (Ph.D.)--Louisiana State University and Agricultural & Mechanical College, 2006.
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In herd health studies, the mixed effects logistic regression model with random herd effects are commonly used for modeling clustered binary data. These models are well developed and widely used in the literature, among which is the logistic-normal regression model. In contrast to the rich literature in modeling methods, the sample size/power analysis methods for such mixed effects models are sparse. The sample size/power analysis method for the logistic-normal regression model is not readily available. This study is to develop a power analysis/sample size estimation method for the logistic-normal regression model. Extended from the sample size method for the likelihood ratio test in the generalized linear models (Self et al., 1992), a power analysis method for the logistic-normal model is developed based on a noncentral chi-square approximation to the distribution of the likelihood ratio statistic. The method described in this dissertation can be applied to both exchangeable and non-exchangeable responses. The power curves are presented with respect to the change of each of the planning values while holding other planning values fixed for two examples of the logistic-normal model containing one random cluster effect.
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The results from this proposed sample size/power analysis method for the logistic-normal model were compared to the results from the method for the fixed effects logistic regression model. For a given total sample size and the same applicable planning values, the power for the logistic-normal regression model is smaller than that for the fixed effects logistic regression model, suggesting that the minimum required sample size calculated from using the method for the fixed effects model is too small to achieve the desired power when the logistic-normal model is to be used in data analysis.
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http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3208179
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