Low birth weight, small for gestational age and preterm births before and after the economic collapse in Iceland: a population based cohort study.

<h4>Objective</h4>Infants born small for gestational age (SGA) or preterm have increased rates of perinatal morbidity and mortality. Stressful events have been suggested as potential contributors to preterm birth (PB) and low birth weight (LBW). We studied the effect of the 2008 economic...

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Autores principales:	Védís Helga Eiríksdóttir, Tinna Laufey Ásgeirsdóttir, Ragnheiður Ingibjörg Bjarnadóttir, Robert Kaestner, Sven Cnattingius, Unnur Anna Valdimarsdóttir
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d8ed6dce4f0245589e2155d496a45e96
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spelling	oai:doaj.org-article:d8ed6dce4f0245589e2155d496a45e962021-11-18T08:43:38ZLow birth weight, small for gestational age and preterm births before and after the economic collapse in Iceland: a population based cohort study.1932-620310.1371/journal.pone.0080499https://doaj.org/article/d8ed6dce4f0245589e2155d496a45e962013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24324602/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Objective</h4>Infants born small for gestational age (SGA) or preterm have increased rates of perinatal morbidity and mortality. Stressful events have been suggested as potential contributors to preterm birth (PB) and low birth weight (LBW). We studied the effect of the 2008 economic collapse in Iceland on the risks of adverse birth outcomes.<h4>Study design</h4>The study population constituted all Icelandic women giving birth to live-born singletons from January 1(st) 2006 to December 31(st) 2009. LBW infants were defined as those weighing <2500 grams at birth, PB infants as those born before 37 weeks of gestation and SGA as those with a birth weight for gestational age more than 2 standard deviations (SD's) below the mean according to the Swedish fetal growth curve. We used logistic regression analysis to estimate odds ratios [OR] and corresponding 95 percent confidence intervals [95% CI] of adverse birth outcomes by exposure to calendar time of the economic collapse, i.e. after October 6(th) 2008.<h4>Results</h4>Compared to the preceding period, we observed an increased adjusted odds in LBW-deliveries following the collapse (aOR = 1.24, 95% CI [1.02, 1.52]), particularly among infants born to mothers younger than 25 years (aOR = 1.85, 95% CI [1.25, 2.72]) and not working mothers (aOR = 1.61, 95% CI [1.10, 2.35]). Similarly, we found a tendency towards higher incidence of SGA-births (aOR = 1.14, 95% CI [0.86, 1.51]) particularly among children born to mothers younger than 25 years (aOR = 1.87, 95% CI [1.09, 3.23]) and not working mothers (aOR = 1.86, 95% CI [1.09, 3.17]). No change in risk of PB was observed. The increase of LBW was most distinct 6-9 months after the collapse.<h4>Conclusion</h4>The results suggest an increase in risk of LBW shortly after the collapse of the Icelandic national economy. The increase in LBW seems to be driven by reduced fetal growth rate rather than shorter gestation.Védís Helga EiríksdóttirTinna Laufey ÁsgeirsdóttirRagnheiður Ingibjörg BjarnadóttirRobert KaestnerSven CnattingiusUnnur Anna ValdimarsdóttirPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 12, p e80499 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Védís Helga Eiríksdóttir Tinna Laufey Ásgeirsdóttir Ragnheiður Ingibjörg Bjarnadóttir Robert Kaestner Sven Cnattingius Unnur Anna Valdimarsdóttir Low birth weight, small for gestational age and preterm births before and after the economic collapse in Iceland: a population based cohort study.
description	<h4>Objective</h4>Infants born small for gestational age (SGA) or preterm have increased rates of perinatal morbidity and mortality. Stressful events have been suggested as potential contributors to preterm birth (PB) and low birth weight (LBW). We studied the effect of the 2008 economic collapse in Iceland on the risks of adverse birth outcomes.<h4>Study design</h4>The study population constituted all Icelandic women giving birth to live-born singletons from January 1(st) 2006 to December 31(st) 2009. LBW infants were defined as those weighing <2500 grams at birth, PB infants as those born before 37 weeks of gestation and SGA as those with a birth weight for gestational age more than 2 standard deviations (SD's) below the mean according to the Swedish fetal growth curve. We used logistic regression analysis to estimate odds ratios [OR] and corresponding 95 percent confidence intervals [95% CI] of adverse birth outcomes by exposure to calendar time of the economic collapse, i.e. after October 6(th) 2008.<h4>Results</h4>Compared to the preceding period, we observed an increased adjusted odds in LBW-deliveries following the collapse (aOR = 1.24, 95% CI [1.02, 1.52]), particularly among infants born to mothers younger than 25 years (aOR = 1.85, 95% CI [1.25, 2.72]) and not working mothers (aOR = 1.61, 95% CI [1.10, 2.35]). Similarly, we found a tendency towards higher incidence of SGA-births (aOR = 1.14, 95% CI [0.86, 1.51]) particularly among children born to mothers younger than 25 years (aOR = 1.87, 95% CI [1.09, 3.23]) and not working mothers (aOR = 1.86, 95% CI [1.09, 3.17]). No change in risk of PB was observed. The increase of LBW was most distinct 6-9 months after the collapse.<h4>Conclusion</h4>The results suggest an increase in risk of LBW shortly after the collapse of the Icelandic national economy. The increase in LBW seems to be driven by reduced fetal growth rate rather than shorter gestation.
format	article
author	Védís Helga Eiríksdóttir Tinna Laufey Ásgeirsdóttir Ragnheiður Ingibjörg Bjarnadóttir Robert Kaestner Sven Cnattingius Unnur Anna Valdimarsdóttir
author_facet	Védís Helga Eiríksdóttir Tinna Laufey Ásgeirsdóttir Ragnheiður Ingibjörg Bjarnadóttir Robert Kaestner Sven Cnattingius Unnur Anna Valdimarsdóttir
author_sort	Védís Helga Eiríksdóttir
title	Low birth weight, small for gestational age and preterm births before and after the economic collapse in Iceland: a population based cohort study.
title_short	Low birth weight, small for gestational age and preterm births before and after the economic collapse in Iceland: a population based cohort study.
title_full	Low birth weight, small for gestational age and preterm births before and after the economic collapse in Iceland: a population based cohort study.
title_fullStr	Low birth weight, small for gestational age and preterm births before and after the economic collapse in Iceland: a population based cohort study.
title_full_unstemmed	Low birth weight, small for gestational age and preterm births before and after the economic collapse in Iceland: a population based cohort study.
title_sort	low birth weight, small for gestational age and preterm births before and after the economic collapse in iceland: a population based cohort study.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/d8ed6dce4f0245589e2155d496a45e96
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Low birth weight, small for gestational age and preterm births before and after the economic collapse in Iceland: a population based cohort study.

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