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Computational and Mathematical Methods in Medicine
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Sufficient Sample Size and Power in Multilevel Ordinal Logistic Regression Models

Sufficient sample size and power in multilevel ordinal logistic regression models
Authors: Sabz Ali; Amjad Ali 0003; Sajjad Ahmad Khan; Sundas Hussain;

Sufficient Sample Size and Power in Multilevel Ordinal Logistic Regression Models

Abstract

For most of the time, biomedical researchers have been dealing with ordinal outcome variable in multilevel models where patients are nested in doctors. We can justifiably apply multilevel cumulative logit model, where the outcome variable represents the mild, severe, and extremely severe intensity of diseases like malaria and typhoid in the form of ordered categories. Based on our simulation conditions, Maximum Likelihood (ML) method is better than Penalized Quasilikelihood (PQL) method in three-category ordinal outcome variable. PQL method, however, performs equally well as ML method where five-category ordinal outcome variable is used. Further, to achieve power more than 0.80, at least 50 groups are required for both ML and PQL methods of estimation. It may be pointed out that, for five-category ordinal response variable model, the power of PQL method is slightly higher than the power of ML method.

Keywords

maximum likelihood method, Biomedical Research, General biostatistics, Statistics as Topic, Applications of statistics to biology and medical sciences; meta analysis, multilevel ordinal logistic regression model, Humans, Computer Simulation, Typhoid Fever, Likelihood Functions, Models, Statistical, Linear regression; mixed models, Data Collection, Reproducibility of Results, Malaria, Treatment Outcome, Research Design, Data Interpretation, Statistical, Sample Size, penalized quasilikelihood, Multilevel Analysis, Regression Analysis, Algorithms, Research Article

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    influence
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
19
Top 10%
Top 10%
Average
Green
gold
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