A new approach to estimating weight change and its reference intervals during the first 96 hours of life

Bibliographic Details
Main Author: Fonseca, MJ
Publication Date: 2015
Other Authors: Severo, M, Santos, AC
Format: Article
Language: eng
Source: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Download full: http://hdl.handle.net/10216/114894
Summary: AIM: We aimed to apply a novel model to estimate weight change and its reference intervals during the first 96 h of life and the time of weight nadir. METHODS: This study involved 1288 full-term singletons, from the Generation XXI birth cohort. Recruitment occurred between 2005 and 2006 in all five public units providing obstetrical and neonatal care in Porto, Portugal. Birthweight was abstracted from clinical records, and the subsequent newborn anthropometrics were obtained by trained examiners. Longitudinal models to estimate postnatal weight were tested and the weight ratio was calculated as the weight during 96 h of life divided by birthweight. RESULTS: The chosen model was (weight(t)~ 3241.442 + (-9.378) × t + 0.119 × t(2) + 0.000 × t(3) + b0i + b1i × t, where t represented the newborn infant's age in hours and bi represented the random coefficients. The curve inflection point (nadir) was achieved at 52.3 h of life, corresponding to a loss of 218 g and a weight ratio of 0.933. We estimated that at six, 12, 24 and 36 h of life the mean weight ratio and 10th-90th percentiles were 0.978 (0.968-0.988), 0.968 (0.953-0.983), 0.951 (0.928-0.974) and 0.939 (0.909-0.969), respectively. CONCLUSION: .This model allows a more accurate estimate of newborn weight change and its reference intervals, and estimated the nadir at 52.3 h of life, corresponding to a weight ratio of 0.933.
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spelling A new approach to estimating weight change and its reference intervals during the first 96 hours of lifeNeonateNewborn - Weight lossAIM: We aimed to apply a novel model to estimate weight change and its reference intervals during the first 96 h of life and the time of weight nadir. METHODS: This study involved 1288 full-term singletons, from the Generation XXI birth cohort. Recruitment occurred between 2005 and 2006 in all five public units providing obstetrical and neonatal care in Porto, Portugal. Birthweight was abstracted from clinical records, and the subsequent newborn anthropometrics were obtained by trained examiners. Longitudinal models to estimate postnatal weight were tested and the weight ratio was calculated as the weight during 96 h of life divided by birthweight. RESULTS: The chosen model was (weight(t)~ 3241.442 + (-9.378) × t + 0.119 × t(2) + 0.000 × t(3) + b0i + b1i × t, where t represented the newborn infant's age in hours and bi represented the random coefficients. The curve inflection point (nadir) was achieved at 52.3 h of life, corresponding to a loss of 218 g and a weight ratio of 0.933. We estimated that at six, 12, 24 and 36 h of life the mean weight ratio and 10th-90th percentiles were 0.978 (0.968-0.988), 0.968 (0.953-0.983), 0.951 (0.928-0.974) and 0.939 (0.909-0.969), respectively. CONCLUSION: .This model allows a more accurate estimate of newborn weight change and its reference intervals, and estimated the nadir at 52.3 h of life, corresponding to a weight ratio of 0.933.20152015-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10216/114894eng0803-5253 10.1111/apa.12894Fonseca, MJSevero, MSantos, ACinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-11-29T14:58:50Zoai:repositorio-aberto.up.pt:10216/114894Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T00:12:54.710545Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv A new approach to estimating weight change and its reference intervals during the first 96 hours of life
title A new approach to estimating weight change and its reference intervals during the first 96 hours of life
spellingShingle A new approach to estimating weight change and its reference intervals during the first 96 hours of life
Fonseca, MJ
Neonate
Newborn - Weight loss
title_short A new approach to estimating weight change and its reference intervals during the first 96 hours of life
title_full A new approach to estimating weight change and its reference intervals during the first 96 hours of life
title_fullStr A new approach to estimating weight change and its reference intervals during the first 96 hours of life
title_full_unstemmed A new approach to estimating weight change and its reference intervals during the first 96 hours of life
title_sort A new approach to estimating weight change and its reference intervals during the first 96 hours of life
author Fonseca, MJ
author_facet Fonseca, MJ
Severo, M
Santos, AC
author_role author
author2 Severo, M
Santos, AC
author2_role author
author
dc.contributor.author.fl_str_mv Fonseca, MJ
Severo, M
Santos, AC
dc.subject.por.fl_str_mv Neonate
Newborn - Weight loss
topic Neonate
Newborn - Weight loss
description AIM: We aimed to apply a novel model to estimate weight change and its reference intervals during the first 96 h of life and the time of weight nadir. METHODS: This study involved 1288 full-term singletons, from the Generation XXI birth cohort. Recruitment occurred between 2005 and 2006 in all five public units providing obstetrical and neonatal care in Porto, Portugal. Birthweight was abstracted from clinical records, and the subsequent newborn anthropometrics were obtained by trained examiners. Longitudinal models to estimate postnatal weight were tested and the weight ratio was calculated as the weight during 96 h of life divided by birthweight. RESULTS: The chosen model was (weight(t)~ 3241.442 + (-9.378) × t + 0.119 × t(2) + 0.000 × t(3) + b0i + b1i × t, where t represented the newborn infant's age in hours and bi represented the random coefficients. The curve inflection point (nadir) was achieved at 52.3 h of life, corresponding to a loss of 218 g and a weight ratio of 0.933. We estimated that at six, 12, 24 and 36 h of life the mean weight ratio and 10th-90th percentiles were 0.978 (0.968-0.988), 0.968 (0.953-0.983), 0.951 (0.928-0.974) and 0.939 (0.909-0.969), respectively. CONCLUSION: .This model allows a more accurate estimate of newborn weight change and its reference intervals, and estimated the nadir at 52.3 h of life, corresponding to a weight ratio of 0.933.
publishDate 2015
dc.date.none.fl_str_mv 2015
2015-01-01T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10216/114894
url http://hdl.handle.net/10216/114894
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 0803-5253 
10.1111/apa.12894
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instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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