Evaluation of a bayesian model integration-based method for censored data.
Evaluation of a bayesian model integration-based method for censored data.
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DOI:
10.1159/000342707
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发表时间:
2012
期刊:
影响因子:
1.8
通讯作者:
Bartlett CW
中科院分区:
文献类型:
--
作者:
Hou L;Wang K;Bartlett CW
Non-random missing data can adversely affect family-based linkage detection through loss of power and possible introduction of bias depending on how censoring is modeled. We examined the statistical properties of a previously proposed quantitative trait threshold (QTT) model developed for when censored data can be reasonably inferred to be beyond an unknown threshold. The QTT model is a Bayesian model integration approach implemented in the PPL framework that requires neither specification of the threshold nor imputation of the missing data. This model was evaluated under a range of simulated datasets and compared to other methods with missing data imputed. Across the simulated conditions, the addition of a threshold parameter did not change PPL’s properties relative to quantitative trait analysis on non-censored data except for a slight reduction in the average PPL as a reflection of the lowered information content due to censoring. This remained the case for non-normally distributed data and extreme sampling of pedigrees. Overall, the QTT model showed the smallest loss of linkage information relative to alternative approaches and therefore provides a unique analysis tool that obviates the need for ad hoc imputation of censored data in gene mapping studies.
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影响因子:
4.9
作者:
Vieland, Veronica J.;Hallmayer, Joachim;Huang, Yungui;Pagnamenta, Alistair T.;Pinto, Dalila;Khan, Hameed;Monaco, Anthony P.;Paterson, Andrew D.;Scherer, Stephen W.;Sutcliffe, James S.;Szatmari, Peter
通讯作者:
Szatmari, Peter
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通讯作者:
Harrap, SB
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3.3
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Sillanpaa, Mikko J.;Hoti, Fabian
通讯作者:
Hoti, Fabian
影响因子:
2.9
作者:
Bartlett CW;Vieland VJ
通讯作者:
Vieland VJ
影响因子:
30.8
作者:
Abecasis, GR;Cherny, SS;Cardon, LR
通讯作者:
Cardon, LR