Improving upon the efficiency of complete case analysis when covariates are MNAR.
Improving upon the efficiency of complete case analysis when covariates are MNAR.
复制标题
当协变量为 MNAR 时,提高完整案例分析的效率。
DOI:
10.1093/biostatistics/kxu023
复制
发表时间:
2014-10
期刊:
影响因子:
--
通讯作者:
Vansteelandt S
中科院分区:
文献类型:
--
作者:
Bartlett JW;Carpenter JR;Tilling K;Vansteelandt S
Missing values in covariates of regression models are a pervasive problem in empirical research. Popular approaches for analyzing partially observed datasets include complete case analysis (CCA), multiple imputation (MI), and inverse probability weighting (IPW). In the case of missing covariate values, these methods (as typically implemented) are valid under different missingness assumptions. In particular, CCA is valid under missing not at random (MNAR) mechanisms in which missingness in a covariate depends on the value of that covariate, but is conditionally independent of outcome. In this paper, we argue that in some settings such an assumption is more plausible than the missing at random assumption underpinning most implementations of MI and IPW. When the former assumption holds, although CCA gives consistent estimates, it does not make use of all observed information. We therefore propose an augmented CCA approach which makes the same conditional independence assumption for missingness as CCA, but which improves efficiency through specification of an additional model for the probability of missingness, given the fully observed variables. The new method is evaluated using simulations and illustrated through application to data on reported alcohol consumption and blood pressure from the US National Health and Nutrition Examination Survey, in which data are likely MNAR independent of outcome.
登录
查看更多内容
DOI:
10.1136/bmj.b2393
发表时间:
2009-06-29
期刊:
BMJ (Clinical research ed.)
影响因子:
--
作者:
Sterne JA;White IR;Carlin JB;Spratt M;Royston P;Kenward MG;Wood AM;Carpenter JR
通讯作者:
Carpenter JR
影响因子:
2
作者:
White, Ian R.;Carlin, John B.
通讯作者:
Carlin, John B.
DOI:
10.1111/j.1467-985x.2006.00407.x
发表时间:
2006-01-01
影响因子:
2
作者:
Carpenter, James R.;Kenward, Michael G.;Vansteelandt, Stijn
通讯作者:
Vansteelandt, Stijn
DOI:
10.1198/016214505000000295
发表时间:
2005-12-01
影响因子:
3.7
作者:
Qi, LH;Wang, CY;Prentice, RL
通讯作者:
Prentice, RL
DOI:
10.1111/j.1467-9876.2011.00763.x
发表时间:
2011-01-01
影响因子:
1.6
作者:
Little, Roderick J.;Zhang, Nanhua
通讯作者:
Zhang, Nanhua