Power and Sample Size Calculations for Generalized Estimating Equations via Local Asymptotics
نویسندگان
چکیده
منابع مشابه
Power and Sample Size Calculations for Generalized Estimating Equations via Local Asymptotics.
We consider the problem of calculating power and sample size for tests based on generalized estimating equations (GEE), that arise in studies involving clustered or correlated data (e.g., longitudinal studies and sibling studies). Previous approaches approximate the power of such tests using the asymptotic behavior of the test statistics under fixed alternatives. We develop a more accurate appr...
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This talk discusses the problem of calculating power in generalized estimating equation (GEE) settings that arise in biomedical studies involving clustered or correlated data (e.g., longitudinal studies and sibling studies). Existing approaches [e.g., Liu and Liang (1997) and Shih (1997)] approximate the power based on fixed alternatives. A more rigorous and potentially more accurate approach, ...
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Covariate measurement error is often a feature of scientific data used for regression modelling. The consequences of such errors include a loss of power of tests of significance for the regression parameters corresponding to the true covariates. Power and sample size calculations that ignore covariate measurement error tend to overestimate power and underestimate the actual sample size required...
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A direct extension of the approach described in Self, Mauritsen, and Ohara (1992, Biometrics 48, 31-39) for power and sample size calculations in generalized linear models is presented. The major feature of the proposed approach is that the modification accommodates both a finite and an infinite number of covariate configurations. Furthermore, for the approximation of the noncentrality of the n...
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Interactions measured on the additive scale are more relevant than multiplicative interaction for assessing public health importance and also more closely related to notions of mechanistic synergism. Most work on sample size and power calculations for interaction have focused on the multiplicative scale. Here we derive analytic expressions for sample size and power calculations for interactions...
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ژورنال
عنوان ژورنال: Statistica Sinica
سال: 2013
ISSN: 1017-0405
DOI: 10.5705/ss.2011.081