Titre :
|
Order-restricted tests for stratified comparisons of binomial proportions
|
Auteurs :
|
A. Agresti ;
B. Coull
|
Type de document :
|
article/chapitre/communication
|
Année de publication :
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1996
|
Format :
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1103-1111
|
Langues:
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= Anglais
|
Mots-clés:
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conditional independence
;
dose-response curve
;
isotonic regression
;
logistic regression
;
loglinear models
;
stochastic ordering
;
Biometrie
;
Caractere qualitatif
;
Test
|
Résumé :
|
The data set presented relates a binomial response to ordered levels of an explanatory variable, representing doses of a drug, with data collected at several centers. A study goal is to test independence of the response and the ordinal factor, assuming under the alternative only that the binomial parameter is a monotonically increasing function of the ordinal predictor. We present two likelihood-ratio tests that are sensitive to order-restricted alternatives. Simulating the exact distributions of the test statistics yields nearly exact P-values. We also discuss related analyses for comparing two groups on an ordinal response, and we propose a test that is sensitive to a stochastic ordering alternative.
|
Source :
|
Biometrics - 0006-341 X, vol. 52, n° 3
|