Circadian misalignment measured by social jetlag from early to late pregnancy and its association with nutritional status: a longitudinal study

Abstract A mismatch between circadian and social clocks leads to a circadian misalignment, which has been widely measured by social jetlag (SJL). There are several studies measuring SJL, but it has not been studied in pregnant women. Therefore, this study aimed to identify the occurrence of SJL thro...

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Autores principales:	Laura Cristina Tibiletti Balieiro, Cristiana Araújo Gontijo, Luisa Pereira Marot, Gabriela Pereira Teixeira, Walid Makin Fahmy, Claudia Roberta de Castro Moreno, Yara Cristina de Paiva Maia, Cibele Aparecida Crispim
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2856e8f2876248eb92637bbe5e8f3a52
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spelling	oai:doaj.org-article:2856e8f2876248eb92637bbe5e8f3a522021-12-02T18:48:09ZCircadian misalignment measured by social jetlag from early to late pregnancy and its association with nutritional status: a longitudinal study10.1038/s41598-021-97946-52045-2322https://doaj.org/article/2856e8f2876248eb92637bbe5e8f3a522021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-97946-5https://doaj.org/toc/2045-2322Abstract A mismatch between circadian and social clocks leads to a circadian misalignment, which has been widely measured by social jetlag (SJL). There are several studies measuring SJL, but it has not been studied in pregnant women. Therefore, this study aimed to identify the occurrence of SJL throughout pregnancy and to verify whether there is an effect of pre-pregnancy body mass index (BMI) on SJL throughout pregnancy. The baseline of the present study was conducted with 205 1st trimester pregnant women of whom 100 were followed in their 2nd and 3rd trimester. SJL was calculated based on the absolute difference between mid-sleep time on workdays versus work-free days. The pre-pregnancy BMI and current BMI (kg/m2) were calculated. Linear regression and Generalised Estimating Equation (GEE) adjusted for confounders were used to determine the association between SJL and the gestational trimesters (time), and anthropometric variables. Most of the pregnant women (54.5%) presented SJL > 1 h in the first gestational trimester. We also found an isolated effect of the gestation trimester on the SJL mean. In this sense, pregnant women had a decrease in SJL from the second to the third trimester (1.33 ± 0.08 versus 1.12 ± 0.07, respectively; p = 0.012). GEE analyzes showed that pregnant women of a normal weight showed a decrease in SJL from the second to the third trimester (1.29 ± 0.11 and 0.93 ± 0.08, respectively, p = 0.032), but this was not found in the other groups of nutritional status (underweight, overweight and obesity). In addition, a positive association between SJL and pre-gestational BMI in the third trimester (β = 0.200, p = 0.046) was found. SJL is quite prevalent during the gestational period and excessive BMI both before and during pregnancy is associated with an increased risk of having SJL > 1 h in the third and second trimesters, respectively. In addition, pregnant women of normal weight—but not underweight or overweight—had decreased SJL from the second to the third trimester.Laura Cristina Tibiletti BalieiroCristiana Araújo GontijoLuisa Pereira MarotGabriela Pereira TeixeiraWalid Makin FahmyClaudia Roberta de Castro MorenoYara Cristina de Paiva MaiaCibele Aparecida CrispimNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Laura Cristina Tibiletti Balieiro Cristiana Araújo Gontijo Luisa Pereira Marot Gabriela Pereira Teixeira Walid Makin Fahmy Claudia Roberta de Castro Moreno Yara Cristina de Paiva Maia Cibele Aparecida Crispim Circadian misalignment measured by social jetlag from early to late pregnancy and its association with nutritional status: a longitudinal study
description	Abstract A mismatch between circadian and social clocks leads to a circadian misalignment, which has been widely measured by social jetlag (SJL). There are several studies measuring SJL, but it has not been studied in pregnant women. Therefore, this study aimed to identify the occurrence of SJL throughout pregnancy and to verify whether there is an effect of pre-pregnancy body mass index (BMI) on SJL throughout pregnancy. The baseline of the present study was conducted with 205 1st trimester pregnant women of whom 100 were followed in their 2nd and 3rd trimester. SJL was calculated based on the absolute difference between mid-sleep time on workdays versus work-free days. The pre-pregnancy BMI and current BMI (kg/m2) were calculated. Linear regression and Generalised Estimating Equation (GEE) adjusted for confounders were used to determine the association between SJL and the gestational trimesters (time), and anthropometric variables. Most of the pregnant women (54.5%) presented SJL > 1 h in the first gestational trimester. We also found an isolated effect of the gestation trimester on the SJL mean. In this sense, pregnant women had a decrease in SJL from the second to the third trimester (1.33 ± 0.08 versus 1.12 ± 0.07, respectively; p = 0.012). GEE analyzes showed that pregnant women of a normal weight showed a decrease in SJL from the second to the third trimester (1.29 ± 0.11 and 0.93 ± 0.08, respectively, p = 0.032), but this was not found in the other groups of nutritional status (underweight, overweight and obesity). In addition, a positive association between SJL and pre-gestational BMI in the third trimester (β = 0.200, p = 0.046) was found. SJL is quite prevalent during the gestational period and excessive BMI both before and during pregnancy is associated with an increased risk of having SJL > 1 h in the third and second trimesters, respectively. In addition, pregnant women of normal weight—but not underweight or overweight—had decreased SJL from the second to the third trimester.
format	article
author	Laura Cristina Tibiletti Balieiro Cristiana Araújo Gontijo Luisa Pereira Marot Gabriela Pereira Teixeira Walid Makin Fahmy Claudia Roberta de Castro Moreno Yara Cristina de Paiva Maia Cibele Aparecida Crispim
author_facet	Laura Cristina Tibiletti Balieiro Cristiana Araújo Gontijo Luisa Pereira Marot Gabriela Pereira Teixeira Walid Makin Fahmy Claudia Roberta de Castro Moreno Yara Cristina de Paiva Maia Cibele Aparecida Crispim
author_sort	Laura Cristina Tibiletti Balieiro
title	Circadian misalignment measured by social jetlag from early to late pregnancy and its association with nutritional status: a longitudinal study
title_short	Circadian misalignment measured by social jetlag from early to late pregnancy and its association with nutritional status: a longitudinal study
title_full	Circadian misalignment measured by social jetlag from early to late pregnancy and its association with nutritional status: a longitudinal study
title_fullStr	Circadian misalignment measured by social jetlag from early to late pregnancy and its association with nutritional status: a longitudinal study
title_full_unstemmed	Circadian misalignment measured by social jetlag from early to late pregnancy and its association with nutritional status: a longitudinal study
title_sort	circadian misalignment measured by social jetlag from early to late pregnancy and its association with nutritional status: a longitudinal study
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/2856e8f2876248eb92637bbe5e8f3a52
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Circadian misalignment measured by social jetlag from early to late pregnancy and its association with nutritional status: a longitudinal study

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