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Mediation Analysis of Maternal Smoking, Gestational Age, and Birth Weight on the Texas–Mexico Border

Published data on the indirect effect of maternal smoking on birth weight as mediated by gestational age in Hispanic populations are lacking. Our goal was to conduct such a mediation analysis using data from El Paso County, Texas. METHODS: El Paso County is located on the US−Mexico border. A simple...

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Autores principales: Ogbutor, Chinodebem, Mishaw, Stephanie M., Mulla, Zuber D.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Lippincott Williams & Wilkins 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10208643/
https://www.ncbi.nlm.nih.gov/pubmed/37263610
http://dx.doi.org/10.14423/SMJ.0000000000001566
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author Ogbutor, Chinodebem
Mishaw, Stephanie M.
Mulla, Zuber D.
author_facet Ogbutor, Chinodebem
Mishaw, Stephanie M.
Mulla, Zuber D.
author_sort Ogbutor, Chinodebem
collection PubMed
description Published data on the indirect effect of maternal smoking on birth weight as mediated by gestational age in Hispanic populations are lacking. Our goal was to conduct such a mediation analysis using data from El Paso County, Texas. METHODS: El Paso County is located on the US−Mexico border. A simple mediation analysis was conducted using year 2010 El Paso County birth certificate data. The SAS macro PROCESS 3.5.3 was used to estimate the direct and indirect effects of active maternal smoking (by trimester) on birth weight (in grams) in the setting of linear regression. The single mediator was gestational age in weeks. A direct or indirect effect was deemed to be present if the 95% confidence limits (CLs) excluded 0. Analyses were adjusted for multiple variables, including maternal prepregnancy body mass index. The indirect effect was reported along with a 95% bootstrap CL. RESULTS: A total of 16,654 singleton births were included in the cohort. The majority of the mothers were White Hispanic (87.2%). The mean (standard deviation) birth weight was 3198.6 g (517.2). A direct effect of maternal smoking during each trimester on birth weight was detected. An indirect effect of maternal smoking on birth weight was not detected in any of the trimesters. In adjusted analyses for the third trimester, the indirect effect for every 1-U increase in the mean number of cigarettes smoked per day was −4.18 (95% bootstrap CL −10.64 to 1.99). CONCLUSIONS: In our large, predominantly Hispanic cohort, it appears that gestational age is not a mediator of the effect of maternal smoking on birth weight. Future studies in our population should explore other possible mediators of this association.
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spelling pubmed-102086432023-05-31 Mediation Analysis of Maternal Smoking, Gestational Age, and Birth Weight on the Texas–Mexico Border Ogbutor, Chinodebem Mishaw, Stephanie M. Mulla, Zuber D. South Med J Women’s & Children’s Health Published data on the indirect effect of maternal smoking on birth weight as mediated by gestational age in Hispanic populations are lacking. Our goal was to conduct such a mediation analysis using data from El Paso County, Texas. METHODS: El Paso County is located on the US−Mexico border. A simple mediation analysis was conducted using year 2010 El Paso County birth certificate data. The SAS macro PROCESS 3.5.3 was used to estimate the direct and indirect effects of active maternal smoking (by trimester) on birth weight (in grams) in the setting of linear regression. The single mediator was gestational age in weeks. A direct or indirect effect was deemed to be present if the 95% confidence limits (CLs) excluded 0. Analyses were adjusted for multiple variables, including maternal prepregnancy body mass index. The indirect effect was reported along with a 95% bootstrap CL. RESULTS: A total of 16,654 singleton births were included in the cohort. The majority of the mothers were White Hispanic (87.2%). The mean (standard deviation) birth weight was 3198.6 g (517.2). A direct effect of maternal smoking during each trimester on birth weight was detected. An indirect effect of maternal smoking on birth weight was not detected in any of the trimesters. In adjusted analyses for the third trimester, the indirect effect for every 1-U increase in the mean number of cigarettes smoked per day was −4.18 (95% bootstrap CL −10.64 to 1.99). CONCLUSIONS: In our large, predominantly Hispanic cohort, it appears that gestational age is not a mediator of the effect of maternal smoking on birth weight. Future studies in our population should explore other possible mediators of this association. Lippincott Williams & Wilkins 2023-06 2023-06-01 /pmc/articles/PMC10208643/ /pubmed/37263610 http://dx.doi.org/10.14423/SMJ.0000000000001566 Text en Copyright © 2023 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the Southern Medical Association. https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License 4.0 (CCBY-NC-ND) (https://creativecommons.org/licenses/by-nc-nd/4.0/) , where it is permissible to download and share the work provided it is properly cited. The work cannot be changed in any way or used commercially without permission from the journal.
spellingShingle Women’s & Children’s Health
Ogbutor, Chinodebem
Mishaw, Stephanie M.
Mulla, Zuber D.
Mediation Analysis of Maternal Smoking, Gestational Age, and Birth Weight on the Texas–Mexico Border
title Mediation Analysis of Maternal Smoking, Gestational Age, and Birth Weight on the Texas–Mexico Border
title_full Mediation Analysis of Maternal Smoking, Gestational Age, and Birth Weight on the Texas–Mexico Border
title_fullStr Mediation Analysis of Maternal Smoking, Gestational Age, and Birth Weight on the Texas–Mexico Border
title_full_unstemmed Mediation Analysis of Maternal Smoking, Gestational Age, and Birth Weight on the Texas–Mexico Border
title_short Mediation Analysis of Maternal Smoking, Gestational Age, and Birth Weight on the Texas–Mexico Border
title_sort mediation analysis of maternal smoking, gestational age, and birth weight on the texas–mexico border
topic Women’s & Children’s Health
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10208643/
https://www.ncbi.nlm.nih.gov/pubmed/37263610
http://dx.doi.org/10.14423/SMJ.0000000000001566
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