Use of a Bayesian hierarchical model to study the allometric scaling of the fetoplacental weight ratio
Abstract Objectives: to propose the use of a Bayesian hierarchical model to study the allometric scaling of the fetoplacental weight ratio, including possible confounders. Methods: data from 26 singleton pregnancies with gestational age at birth between 37 and 42 weeks were analyzed. The placentas...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Instituto Materno Infantil de Pernambuco
2016-03-01
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| Series: | Revista Brasileira de Saúde Materno Infantil |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-38292016000100067&lng=en&tlng=en |
| _version_ | 1811321204075659264 |
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| author | Fidel Ernesto Castro Morales Anna Cecília Queiroz de Medeiros |
| author_facet | Fidel Ernesto Castro Morales Anna Cecília Queiroz de Medeiros |
| author_sort | Fidel Ernesto Castro Morales |
| collection | DOAJ |
| description | Abstract Objectives: to propose the use of a Bayesian hierarchical model to study the allometric scaling of the fetoplacental weight ratio, including possible confounders. Methods: data from 26 singleton pregnancies with gestational age at birth between 37 and 42 weeks were analyzed. The placentas were collected immediately after delivery and stored under refrigeration until the time of analysis, which occurred within up to 12 hours. Maternal data were collected from medical records. A Bayesian hierarchical model was proposed and Markov chain Monte Carlo simulation methods were used to obtain samples from distribution a posteriori. Results: the model developed showed a reasonable fit, even allowing for the incorporation of variables and a priori information on the parameters used. Conclusions: new variables can be added to the modelfrom the available code, allowing many possibilities for data analysis and indicating the potential for use in research on the subject. |
| first_indexed | 2024-04-13T13:13:52Z |
| format | Article |
| id | doaj.art-47ec18524904489f86218735f273ec54 |
| institution | Directory Open Access Journal |
| issn | 1806-9304 |
| language | English |
| last_indexed | 2024-04-13T13:13:52Z |
| publishDate | 2016-03-01 |
| publisher | Instituto Materno Infantil de Pernambuco |
| record_format | Article |
| series | Revista Brasileira de Saúde Materno Infantil |
| spelling | doaj.art-47ec18524904489f86218735f273ec542022-12-22T02:45:32ZengInstituto Materno Infantil de PernambucoRevista Brasileira de Saúde Materno Infantil1806-93042016-03-01161677010.1590/1806-93042016000100008S1519-38292016000100067Use of a Bayesian hierarchical model to study the allometric scaling of the fetoplacental weight ratioFidel Ernesto Castro MoralesAnna Cecília Queiroz de MedeirosAbstract Objectives: to propose the use of a Bayesian hierarchical model to study the allometric scaling of the fetoplacental weight ratio, including possible confounders. Methods: data from 26 singleton pregnancies with gestational age at birth between 37 and 42 weeks were analyzed. The placentas were collected immediately after delivery and stored under refrigeration until the time of analysis, which occurred within up to 12 hours. Maternal data were collected from medical records. A Bayesian hierarchical model was proposed and Markov chain Monte Carlo simulation methods were used to obtain samples from distribution a posteriori. Results: the model developed showed a reasonable fit, even allowing for the incorporation of variables and a priori information on the parameters used. Conclusions: new variables can be added to the modelfrom the available code, allowing many possibilities for data analysis and indicating the potential for use in research on the subject.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-38292016000100067&lng=en&tlng=enPeso ao nascerPlacentaAnálise estatística de dados |
| spellingShingle | Fidel Ernesto Castro Morales Anna Cecília Queiroz de Medeiros Use of a Bayesian hierarchical model to study the allometric scaling of the fetoplacental weight ratio Revista Brasileira de Saúde Materno Infantil Peso ao nascer Placenta Análise estatística de dados |
| title | Use of a Bayesian hierarchical model to study the allometric scaling of the fetoplacental weight ratio |
| title_full | Use of a Bayesian hierarchical model to study the allometric scaling of the fetoplacental weight ratio |
| title_fullStr | Use of a Bayesian hierarchical model to study the allometric scaling of the fetoplacental weight ratio |
| title_full_unstemmed | Use of a Bayesian hierarchical model to study the allometric scaling of the fetoplacental weight ratio |
| title_short | Use of a Bayesian hierarchical model to study the allometric scaling of the fetoplacental weight ratio |
| title_sort | use of a bayesian hierarchical model to study the allometric scaling of the fetoplacental weight ratio |
| topic | Peso ao nascer Placenta Análise estatística de dados |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-38292016000100067&lng=en&tlng=en |
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