Dose–response modelling for bivariate covariates with and without a spike at zero: theory and application to binary outcomes
Dose–response modelling for bivariate covariates with and without a spike at zero: theory and application to binary outcomes
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有或没有零峰值的双变量协变量的剂量响应模型:二元结果的理论和应用
DOI:
10.1111/stan.12064
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发表时间:
2015
影响因子:
1.5
通讯作者:
Becher H
中科院分区:
文献类型:
--
作者:
Lorenz E;Jenkner C;Sauerbrei W;Becher H
In epidemiology and clinical research, there is often a proportion of unexposed individuals resulting in zero values of exposure, meaning that some individuals are not exposed and those exposed have some continuous distribution. Examples are smoking or alcohol consumption. We will call these variables with a spike at zero (SAZ). In this paper, we performed a systematic investigation on how to model covariates with a SAZ and derived theoretical odds ratio functions for selected bivariate distributions. We consider the bivariate normal and bivariate log normal distribution with a SAZ. Both confounding and effect modification can be elegantly described by formalizing the covariance matrix given the binary outcome variableY. To model the effect of these variables, we use a procedure based on fractional polynomials first introduced by Royston and Altman (1994,Applied Statistics43: 429–467) and modified for the SAZ situation (Royston and Sauerbrei, 2008,Multivariable model‐building: a pragmatic approach to regression analysis based on fractional polynomials for modelling continuous variables, Wiley; Becheret al., 2012,Biometrical Journal54: 686–700). We aim to contribute to theory, practical procedures and application in epidemiology and clinical research to derive multivariable models for variables with a SAZ. As an example, we use data from a case–control study on lung cancer.
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影响因子:
1.7
作者:
Becher, Heiko;Lorenz, Eva;Sauerbrei, Willi
通讯作者:
Sauerbrei, Willi
DOI:
--
发表时间:
2014
期刊:
Biometrical journal. Biometrische Zeitschrift
影响因子:
--
作者:
E. Dreassi;A. Petrucci;E. Rocco
通讯作者:
E. Rocco
影响因子:
7.7
作者:
AHRENS, W;JOCKEL, KH;BERRINO, F
通讯作者:
BERRINO, F
影响因子:
1.5
作者:
Vink, Gerko;Frank, Laurence E.;van Buuren, Stef
通讯作者:
van Buuren, Stef
影响因子:
1.3
作者:
Ya‐Wen Yang;C. Fu
通讯作者:
C. Fu