Bayesian Copula Density Deconvolution for Zero-Inflated Data in Nutritional Epidemiology.
Bayesian Copula Density Deconvolution for Zero-Inflated Data in Nutritional Epidemiology.
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DOI:
10.1080/01621459.2020.1782220
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发表时间:
2021
影响因子:
3.7
通讯作者:
Carroll RJ
中科院分区:
文献类型:
--
作者:
Sarkar A;Pati D;Mallick BK;Carroll RJ
Estimating the marginal and joint densities of the long-term average intakes of different dietary components is an important problem in nutritional epidemiology. Since these variables cannot be directly measured, data are usually collected in the form of 24-hour recalls of the intakes, which show marked patterns of conditional heteroscedasticity. Significantly compounding the challenges, the recalls for episodically consumed dietary components also include exact zeros. The problem of estimating the density of the latent long-time intakes from their observed measurement error contaminated proxies is then a problem of deconvolution of densities with zero-inflated data. We propose a Bayesian semiparametric solution to the problem, building on a novel hierarchical latent variable framework that translates the problem to one involving continuous surrogates only. Crucial to accommodating important aspects of the problem, we then design a copula based approach to model the involved joint distributions, adopting different modeling strategies for the marginals of the different dietary components. We design efficient Markov chain Monte Carlo algorithms for posterior inference and illustrate the efficacy of the proposed method through simulation experiments. Applied to our motivating nutritional epidemiology problems, compared to other approaches, our method provides more realistic estimates of the consumption patterns of episodically consumed dietary components.
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影响因子:
5.7
作者:
Eilers, PHC;Marx, BD
通讯作者:
Marx, BD
影响因子:
3.7
作者:
GEISSER, S;EDDY, WF
通讯作者:
EDDY, WF
DOI:
10.1080/10618600.2014.899237
发表时间:
2014-10-01
期刊:
Journal of computational and graphical statistics : a joint publication of American Statistical Association, Institute of Mathematical Statistics, Interface Foundation of North America
影响因子:
--
作者:
Sarkar A;Mallick BK;Staudenmayer J;Pati D;Carroll RJ
通讯作者:
Carroll RJ
影响因子:
--
作者:
Tooze, Janet A.;Midthune, Douglas;Kipnis, Victor
通讯作者:
Kipnis, Victor
影响因子:
1.9
作者:
Kipnis V;Midthune D;Buckman DW;Dodd KW;Guenther PM;Krebs-Smith SM;Subar AF;Tooze JA;Carroll RJ;Freedman LS
通讯作者:
Freedman LS