An Exact Corrected Log-Likelihood Function for Cox's Proportional Hazards Model under Measurement Error and Some Extensions
AbstractThis paper studies Cox's proportional hazards model under covariate measurement error. Nakamura's ["Biometrika" 77 (1990) 127] methodology of corrected log-likelihood will be applied to the so-called Breslow likelihood, which is, in the absence of measurement error, equivalent to partial likelihood. For a general error model with possibly heteroscedastic and non-normal additive measurement error, corrected estimators of the regression parameter as well as of the baseline hazard rate are obtained. The estimators proposed by Nakamura [Biometrics 48 (1992) 829], Kong "et al." ["Scand. J. Statist." 25 (1998) 573] and Kong & Gu ["Statistica Sinica" 9 (1999) 953] are re-established in the special cases considered there. This sheds new light on these estimators and justifies them as "exact" corrected score estimators. Finally, the method will be extended to some variants of the Cox model. Copyright Board of the Foundation of the Scandinavian Journal of Statistics 2004.
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Bibliographic InfoArticle provided by Danish Society for Theoretical Statistics & Finnish Statistical Society & Norwegian Statistical Association & Swedish Statistical Association in its journal Scandinavian Journal of Statistics.
Volume (Year): 31 (2004)
Issue (Month): 1 ()
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