Covariate measurement error and the esti
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Tor D. Tosteson; John P. Buonaccorsi; Eugene Demidenko
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Article
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1998
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John Wiley and Sons
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English
โ 163 KB
๐ 3 views
We explore the effects of measurement error in a time-varying covariate for a mixed model applied to a longitudinal study of plasma levels and dietary intake of beta-carotene. We derive a simple expression for the bias of large sample estimates of the variance of random effects in a longitudinal mod