Small for gestational age newborn infants. The effect of standard curves of birth weight on the calculation of the prevalence and of the risk factors.

Detalhes bibliográficos
Autor(a) principal: Rodrigues, T
Data de Publicação: 1996
Outros Autores: Teles, T P, Miguel, C, Pereira, A, Barros, H
Tipo de documento: Artigo
Idioma: por
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: https://www.actamedicaportuguesa.com/revista/index.php/amp/article/view/2623
Resumo: Sampling decisions, statistical methods and criteria for dating pregnancy all influence birth-weight percentiles and the ability to classify a newborn as growth retarded or small for date. Consequently the prevalence of small for date, the type and the magnitude of risk factors associated with this condition, and the evaluation of preventive interventions are dependent on the standards used. In this study we established birthweight standards for sex and gestational age (36 to 41 weeks) in a sample of 7518 singleton newborns delivered from 1989-92 at Famalicão Hospital. Later, these reference percentiles were applied to a sample of 2210 to calculate the prevalence of small for date, to evaluate associated risk factors, and to compare these estimates with those obtained using Thompson or Lubchenco published charts. The prevalence of small for gestational age was significantly higher using local standards (9.9 or 10.0%) when compared with those obtained using Thompson (8.8%, p < 0.005) or Lubchenco (4.4%, p < 0.005) percentiles. However, the risk factors identified and the magnitude of the point estimates for odds ratios were similar regardless of the reference percentiles. This study shows a significant misclassification of newborns as small or adequate for gestational age that may affect individual prognosis, but this is not reflected in the type and the importance of detected risk factors at a group level.
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spelling Small for gestational age newborn infants. The effect of standard curves of birth weight on the calculation of the prevalence and of the risk factors.Recém-nascidos leves para a idade gestacional. Influência das curvas padrão de peso ao nascimento no cálculo da sua prevalência e dos factores de risco.Sampling decisions, statistical methods and criteria for dating pregnancy all influence birth-weight percentiles and the ability to classify a newborn as growth retarded or small for date. Consequently the prevalence of small for date, the type and the magnitude of risk factors associated with this condition, and the evaluation of preventive interventions are dependent on the standards used. In this study we established birthweight standards for sex and gestational age (36 to 41 weeks) in a sample of 7518 singleton newborns delivered from 1989-92 at Famalicão Hospital. Later, these reference percentiles were applied to a sample of 2210 to calculate the prevalence of small for date, to evaluate associated risk factors, and to compare these estimates with those obtained using Thompson or Lubchenco published charts. The prevalence of small for gestational age was significantly higher using local standards (9.9 or 10.0%) when compared with those obtained using Thompson (8.8%, p < 0.005) or Lubchenco (4.4%, p < 0.005) percentiles. However, the risk factors identified and the magnitude of the point estimates for odds ratios were similar regardless of the reference percentiles. This study shows a significant misclassification of newborns as small or adequate for gestational age that may affect individual prognosis, but this is not reflected in the type and the importance of detected risk factors at a group level.Sampling decisions, statistical methods and criteria for dating pregnancy all influence birth-weight percentiles and the ability to classify a newborn as growth retarded or small for date. Consequently the prevalence of small for date, the type and the magnitude of risk factors associated with this condition, and the evaluation of preventive interventions are dependent on the standards used. In this study we established birthweight standards for sex and gestational age (36 to 41 weeks) in a sample of 7518 singleton newborns delivered from 1989-92 at Famalicão Hospital. Later, these reference percentiles were applied to a sample of 2210 to calculate the prevalence of small for date, to evaluate associated risk factors, and to compare these estimates with those obtained using Thompson or Lubchenco published charts. The prevalence of small for gestational age was significantly higher using local standards (9.9 or 10.0%) when compared with those obtained using Thompson (8.8%, p < 0.005) or Lubchenco (4.4%, p < 0.005) percentiles. However, the risk factors identified and the magnitude of the point estimates for odds ratios were similar regardless of the reference percentiles. This study shows a significant misclassification of newborns as small or adequate for gestational age that may affect individual prognosis, but this is not reflected in the type and the importance of detected risk factors at a group level.Ordem dos Médicos1996-12-31info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://www.actamedicaportuguesa.com/revista/index.php/amp/article/view/2623oai:ojs.www.actamedicaportuguesa.com:article/2623Acta Médica Portuguesa; Vol. 9 No. 10-12 (1996): Outubro-Dezembro; 335-40Acta Médica Portuguesa; Vol. 9 N.º 10-12 (1996): Outubro-Dezembro; 335-401646-07580870-399Xreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAPporhttps://www.actamedicaportuguesa.com/revista/index.php/amp/article/view/2623https://www.actamedicaportuguesa.com/revista/index.php/amp/article/view/2623/2035Rodrigues, TTeles, T PMiguel, CPereira, ABarros, Hinfo:eu-repo/semantics/openAccess2022-12-20T11:00:52Zoai:ojs.www.actamedicaportuguesa.com:article/2623Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T16:17:52.000760Repositório 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 Small for gestational age newborn infants. The effect of standard curves of birth weight on the calculation of the prevalence and of the risk factors.
Recém-nascidos leves para a idade gestacional. Influência das curvas padrão de peso ao nascimento no cálculo da sua prevalência e dos factores de risco.
title Small for gestational age newborn infants. The effect of standard curves of birth weight on the calculation of the prevalence and of the risk factors.
spellingShingle Small for gestational age newborn infants. The effect of standard curves of birth weight on the calculation of the prevalence and of the risk factors.
Rodrigues, T
title_short Small for gestational age newborn infants. The effect of standard curves of birth weight on the calculation of the prevalence and of the risk factors.
title_full Small for gestational age newborn infants. The effect of standard curves of birth weight on the calculation of the prevalence and of the risk factors.
title_fullStr Small for gestational age newborn infants. The effect of standard curves of birth weight on the calculation of the prevalence and of the risk factors.
title_full_unstemmed Small for gestational age newborn infants. The effect of standard curves of birth weight on the calculation of the prevalence and of the risk factors.
title_sort Small for gestational age newborn infants. The effect of standard curves of birth weight on the calculation of the prevalence and of the risk factors.
author Rodrigues, T
author_facet Rodrigues, T
Teles, T P
Miguel, C
Pereira, A
Barros, H
author_role author
author2 Teles, T P
Miguel, C
Pereira, A
Barros, H
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Rodrigues, T
Teles, T P
Miguel, C
Pereira, A
Barros, H
description Sampling decisions, statistical methods and criteria for dating pregnancy all influence birth-weight percentiles and the ability to classify a newborn as growth retarded or small for date. Consequently the prevalence of small for date, the type and the magnitude of risk factors associated with this condition, and the evaluation of preventive interventions are dependent on the standards used. In this study we established birthweight standards for sex and gestational age (36 to 41 weeks) in a sample of 7518 singleton newborns delivered from 1989-92 at Famalicão Hospital. Later, these reference percentiles were applied to a sample of 2210 to calculate the prevalence of small for date, to evaluate associated risk factors, and to compare these estimates with those obtained using Thompson or Lubchenco published charts. The prevalence of small for gestational age was significantly higher using local standards (9.9 or 10.0%) when compared with those obtained using Thompson (8.8%, p < 0.005) or Lubchenco (4.4%, p < 0.005) percentiles. However, the risk factors identified and the magnitude of the point estimates for odds ratios were similar regardless of the reference percentiles. This study shows a significant misclassification of newborns as small or adequate for gestational age that may affect individual prognosis, but this is not reflected in the type and the importance of detected risk factors at a group level.
publishDate 1996
dc.date.none.fl_str_mv 1996-12-31
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https://www.actamedicaportuguesa.com/revista/index.php/amp/article/view/2623/2035
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publisher.none.fl_str_mv Ordem dos Médicos
dc.source.none.fl_str_mv Acta Médica Portuguesa; Vol. 9 No. 10-12 (1996): Outubro-Dezembro; 335-40
Acta Médica Portuguesa; Vol. 9 N.º 10-12 (1996): Outubro-Dezembro; 335-40
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